Proposal (730) to South
American Classification Committee
Revise generic limits in
the Thraupidae
Burns et al. (2016) proposed major
revisions to generic limits in the Thraupidae based on DNA sequence data
published primarily by the Kevin Burns lab and
collaborators, especially Keith Barker. 
Burns et al. (2014) and Barker et al. (2015) produced comprehensive
phylogenies that together sampled about 95% of the 372 species of true tanagers
(Thraupidae). Their genetic sampling included several mitochondrial and nuclear
makers.  Burns et al. (2016) presented a portions
of the overall tree relevant to the proposed, and so please refer to that in
evaluating the proposal.  The major
overhaul of generic limits in the Thraupidae to conform to phylogenetic data is
an essential first step for studying character evolution and biogeography of
this family and requires immediate attention.
Their results revealed numerous
problems with traditional genus-level classification in the family.  To bring Linnaean classification in line with
the phylogenetic results, Burns et al. (2016) proposed 30 changes relevant to
taxa in the SACC area, grouped as subproposals as follows:
730.01.  Resurrect Rhopospina Cabanis 1851 for Phrygilus
fruticeti.  Phrygilus
(type species = gayi) is highly
polyphyletic, with fruticeti sister
to Porphyrospiza (“Phrygilus” alaudinus + (“Phrygilus” carbonarius)).  These three “Phrygilus” are distantly related to true Phrygilus, and so clearly a change is required.  The alternative to the one proposed by Burns
et al. would be to expand Rhopospina
to include Porphyrospiza and Corydospiza (as in Dickinson & Christidis 2014).  An expanded Rhopospina would unite three species with black and gray plumage
patterns, but the fourth, Porphyrospiza
caerulescens, is all blue, but nonetheless not dissimilar in size and
shape.  However, the time-calibrated
phylogeny of Barker et al. (2015) predicts that fruticeti diverged from the others ca. 7.5 mya, i.e. significantly
older than most taxa ranked as genera in the Thraupidae.  For example, in this same clade, the split of
Stephanophorus from Cissopis + Schistochlamys is the same age as that estimated for the split of fruticeti from the others in this group
A YES vote on 730.01 would be to
follow Burns et al. in resurrecting Rhopospina.  A NO vote would indicate a preference for an
expanded Rhopospina.  I recommend a Yes because of the relatively
old age of the split of fruticeti
from the rest.
Here are specimens of the four
species:
730.02.  Resurrect Corydospiza
Sundevall 1872 for Phrygilus
alaudinus and Phrygilus carbonarius. 
See discussion in 730.01.  The
split of Porphyrospiza from Corydospiza is estimated at ca. 4 mya,
i.e. borderline but not totally out of line with the age of many thraupid
genera.
A YES vote on 730.02 would be to
follow Burns et al. in resurrecting Corydospiza.  A NO vote would indicate a preference for an
expanded Porphyrospiza.  I have no strong recommendation.  An expanded Porphyrospiza would eliminate a monotypic genus whose placement is
certain but would also create a genus that is somewhat heterogeneous in
color.  However, blue and black plumage
is found within other genera, e.g. Diglossa,
true Phrygilus (well, not really blue
blue), and possibly others, so is not of major
phylogenetic significance.
730.03.  Merge Saltatricula
into Saltator. 
Saltatricula multicolor is
sister to Saltator atricollis, and
this pair is sister to all other Saltator.  This issue has come up before with SACC and
basically left unresolved (see SACC 344 and 593 for discussion).
A YES vote on 730.03 would be for
the merger, and a NO vote would be for retaining Saltatricula and including atricollis
in Saltatricula (as in Dickinson & Christidis 2014).  The
similarities between multicolor and atricollis have been discussed in
previous proposals.  I recommend a NO
vote on this because in the time-calibrated tree of Barker et al. (2015) of multicolor and atricollis from other saltators is estimated at ca. 9.5 mya, i.e.
substantially older than that between most taxa treated as genera in the
tanagers.  I think the combination of
this estimate of lineage age combined with the characters previously discussed
provides sufficient evidence for recognizing Saltatricula (and including atricollis
in it as required by the phylogeny).  (By
the way, within remaining Saltator,
there are two primary lineages that diverged ca. 7 mya, and so if we move
towards genera defined by rough lineage age, Saltator is a strong candidate for a split.)
730.04. Merge Tiaris bicolor into (extralimital) currently monotypic Melanospiza and recognize newly named Asemospiza Burns, Unitt, & Mason
2016 for Tiaris obscurus and Tiaris fuliginosus. 
Tiaris is polyphyletic, and
the type species (olivaceus) is
sister to a group of largely Caribbean and Galapagos genera, including all
Galapagos finches.  Tiaris bicolor is sister to Melanospiza
richardsoni,
a relationship that Burns et al. noted was consistent with phenotypic features
(pink legs and dark plumage without facial markings). 
Tiaris bicolor:
Melanospiza richardsoni:
A polytomy in this area of the tree
complicates alternative solutions.  Tiaris obscurus and Tiaris fuliginosus are sisters, but together they are sister to
the Galapagos finches, and thus a new genus must named for them unless they and
all genera of Galapagos finches are merged into a single genus; the latter
radical treatment would, however, be consistent with the estimated age of the
group, i.e. only 2 MY.
A YES vote on 730.04 would be for
the merger, i.e. Tiaris bicolor
becomes Melanospiza bicolor (as in Dickinson & Christidis 2014). 
I strongly recommend a YES on this one because there really is no other
viable solution.  The only other options, both untenable in my opinion,
would be (a) to merge them with all genera of Galapagos finches plus Loxipasser and Loxigilla, or (b) ignore the phylogenetic data to maintain status
quo.
730.05. Recognize new genus Islerothraupis for Tachyphonus cristatus, T.
luctuosus, and T. rufiventer. 
The genus Tachyphonus as
traditionally constituted is highly polyphyletic.  The black and tawny plumage that currently
unites them is found in three different lineages in the Burns et al.’s
Tachyphoninae.  True Tachyphonus (type species T.
rufus) consists of three species (phoenicius,
rufus, and coronatus) that comprise the sister lineage to Ramphocelus; they are species of relatively dry, open habitats, and
two of the three forage fairly near the ground (as in sister genus Ramphocelus) and in contrast to the
species in Islerothraupis.  The sister group to Islerothraupis is Eucometis
+ Trichothraupis.  Barker et al. (2015) estimated the split of Islerothraupis from Eucometis + Trichothraupis
at ca. 8 MYA, i.e. older than most taxa ranked as genera in the tanagers.
A YES vote on 730.05 would be to
recognize Islerothraupis and to
include in it Islerothraupis cristata, I.
luctuosa, and I. rufiventer (note
changes in variable endings).  A NO vote
would indicate a preference for an alternative to recognizing Islerothraupis, i.e. expand Trichothraupis Cabanis 1851 to include
also Eucometis and Islerothraupis, as in Burns et al.’s
Table 1, Alternative 2.  I favor a YES on
this to maintain long-standing and distinctive Eucometis and Trichothraupis
and to recognize the relatively old divergence of these lineages.  However, looking at specimens of Trichothraupis, I can see more
similarities between it and Islerothraupis
than between the latter and other Tachyphonus.
730.06. Recognize new monotypic
genus Maschalethraupis for Tachyphonus surinamus and recognize new
monotypic genus Chrysocorypha for Tachyphonus delatrii. 
See  730.5
for problems with traditional Tachyphonus.  These two species are part of a group in
which the topology is poorly resolved; they have no obvious sister species, and
the only strongly reported node in this section of the tree (see Fig. 2) unites
seven genera, including Coryphospingus
and Rhodospingus.  That surinamus
and delatrii are not sister species
cannot be refuted from the data, but there is no support for that relationship
either.
A YES vote on 730.06 would be to
recognize these two monotypic genera, i.e. Maschalethraupis
surinamus and Chrysocorypha delatrii.  A NO vote would indicate a preference for an
alternative but would require explaining what that alternative would be.  I am not thrilled about recognizing two new
monotypic genera for species, but I do not see an alternative.  Additional genetic data may resolve the
topology in Fig. 2, but if the current branching pattern is close to reality,
but I don’t see any outcomes that would produce a sensible merger of these two
into existing genera; the “best” outcome might be that they are each other’s
sisters, thus combining the two into one of the new genera.  Furthermore, and critical to my views, the
ages estimated for the divergence of surinamus
and delatrii are ancient by tanager
standards, i.e. 7-8 MYA (Barker et al. 2015). 
So, I recommend a YES on this for lack of viable alternatives.
730.07. Resurrect Pseudospingus Berlepsch & Stolzmann
1896 for Hemispingus xanthophthalmus
and H. verticalis. 
Hemispingus
as traditionally defined is polyphyletic … for those who know these birds,
this was expected. 
Hemispingus (type species superciliaris) currently consists of a collection
of Andean tanagers that have rather dull plumage and insectivore bills, but
they really differ in voice and foraging behavior.  They are scattered in 6 different parts of
Burns et al.’s Poospizinae tree.  Within
that tree, these two species are on a branch all by themselves with no certain
close relatives.  These two species have
long been recognized as sister taxa (forming a classic superspecies).
A YES vote on 730.07 would be to
resurrect Pseudospingus for these two
species (as in Dickinson &
Christidis 2014). 
I strongly recommend a Yes on this one because no viable solution
presents itself other than merging multiple phenotypically divergent genera
into one huge genus.  Further, Barker et
al. (2015) estimated the divergence time between this lineage and Cnemoscopus at ca. 8 MYA.
730.08. Merge two species of Hemispingus (H. rufosuperciliaris and H.
goeringi) and the two species of Compsospiza
(C. garleppi and C. baeri) into a more restricted Poospiza (type = P. nigrorufa)
than currently recognized.  The other species retained in Poospiza would be boliviana, ornata, hispaniolensis, and rubecula.  This unites a
group of species defined by a node with high support (Fig. 3).  The two ex-Hemispingus are rare and local in Andean undergrowth.  The two Compsospiza
are also rare and local Andean species that have previously been treated in
Poospiza, so that part is not
controversial.  The four Poospiza are also relatively rare to
uncommon and local residents of Andean regions. 
You can see the ochraceous plumage theme that all members share except hispaniolensis, which is also the one
found in the driest habitats.
Hemispingus goeringi:
A YES vote on 730.08 would be to
treat H. rufosuperciliaris and H. goeringi as Poospiza rufosuperciliaris and P.
goeringi, and Compsospiza garleppi and C. baeri as Poospiza garleppi and P. baeri.  The two Hemispingus are deeply embedded in Poospiza, and so trying to maintain them
in a separate genus would require resurrecting Orospingus Riley for the two Hemispingus
(as in Dickinson & Christidis 2014), retaining Compsospiza, and naming new genera for hispaniolensis and rubecula.  Burns et al.’s revised Poospiza encompasses a group of mostly Andean species with some
shared plumage themes; the difference in bill shape between the two Hemispingus and the conical Poospiza and Compsospiza bills is irrelevant in my opinion because this feature
is highly plastic in birds, particularly tanagers.  Therefore, I recommend a Yes on this one.
730.09.  Recognize newly named Kleinothraupis for four species of Hemispingus (atropileus,
calophrys, reyi, and parodii).  See 730.07 for why Hemispingus cannot be maintained as is.  Kleinothraupis
unites a strongly supported group whose sister relationships are uncertain
other than membership in a group of as many as nine other genera, including
taxa as different as Cypsnagra,
Nephelornis, Thlypopsis, and
former members of Poospiza and Hemispingus.  The close relationship of these four species
has been recognized in traditional classifications.  All four are found in relatively
high-elevation Andean cloud-forest.
Hemispingus reyi:
A YES vote on 730.09 would be to
treat Hemispingus atropileus, H. calophrys, H. reyi, and H. parodii as Kleinothraupis atropileus, K. calophrys, K. reyi, and K. parodii.  I see no other viable alternatives and
strongly recommend a Yes on this one. 
Further, Barker et al. (2015) estimated that this lineage diverged from
their sister group ca. 7 MYA.
730.10.  Resurrect Sphenopsis
Sclater for Hemispingus melanotis and
H. frontalis. 
See 730.07 for why Hemispingus
cannot be maintained as is.  These two
species, traditionally recognized as sisters, constitute a group that is sister
to Thlypopsis.  The only alternative would be to merge these
into Thlypopsis.
A YES vote on 730.10 would be to treat Hemispingus melanotis and H. frontalis as Sphenopsis melanotis and S. frontalis (as in Dickinson & Christidis 2014).  A No vote would presumably be for expanding Thlypopsis to include them.  I recommend a Yes on this because the two species of ex-Hemispingus differ substantially in my subjective view in morphology and plumage (but I am open to alternative views on this).  Barker et al. (2015) estimated the divergence time from Thlypopsis at ca. 6 MYA, so the lineage is well within range of groups ranked as genera in tanagers.
730.11.  Merge Pyrrhocoma
ruficeps and Hemispingus
superciliaris into Thlypopsis. 
These two species are embedded in a strongly supported group that
includes all Thlypopsis.  To retain all three genera would require
naming new genera for various Thlypopsis.  I don’t know Pyrrhocoma other than that it skulks in undergrowth, that its size
and shape are consistent with Thlypopsis,
and that the female really looks like a Thlypopsis.  I used to be very familiar with H. superciliaris, and I am surprised
that this canopy-dweller would be embedded in a group that includes Thlypopsis ruficeps, T. ornata, and T. pectoralis.
A YES vote on 730.11 would be to
treat Pyrrhocoma ruficeps and Hemispingus superciliaris as Thlypopsis pyrrhocoma and T. superciliaris.  Note that the epithet ruficeps is “preoccupied” in Thlypopsis, and thus Burns et al.
introduced the new species name pyrrhocoma
for this species to preserve the connection to Pyrrhocoma (a logical choice). 
I recommend a Yes on this one because the alternatives would involve
naming two new genera, which would presumably be the alternative indicated by a
No vote.
730.12.  Resurrect Poospizopsis
Berlepsch for Poospiza caesar and P. hypochondria. 
Poospiza is highly
polyphyletic (see subproposals above and Fig. 3), and these two species form a
strongly supported group with Donacospiza
and Cypsnagra. 
When I first wrote the proposal, I
thought that any merger of these genera would be unacceptable by any subjective
standard of morphological continuity. 
However, looking at the specimens, This foursome doesn’t look that much
more heterogeneous than, say, reformed Poospiza.
A YES vote on 730.12 would be to
treat Poospiza caesar and P. hypochondria as Poospizopsis caesar and Poospizopsis hypochondria (as in Dickinson & Christidis 2014). Although this is a relatively young
lineage (est. ca. 3 MY in Barker et al. 2015), merging them and Donacospiza into Cypsnagra (which has priority) would seem unpalatable, but maybe
there are themes that they share that I don’t see.  A NO vote would presumably endorse broad Cypsnagra.
730.13.  Recognize newly named, monotypic Castanozoster for Poospiza thoracica.  As you can see from
Fig. 3, P. thoracica is on a lonely
branch within the group that includes the species in 730.12 and also a group
that includes Nephelornis, Urothraupis, and a bunch of phylogenetic
refugees from Poospiza (see next
subproposal), and its relationships within this group are unresolved.  Burns et al. were left with no choice but to
name a new genus for the species.
Phenotypically, I don’t see anything
special about this species; certainly its traditional placement in broad Poospiza cannot be criticized from the
standpoint of external plumage and morphology:
A YES vote on 730.13 would be to
treat Poospiza thoracica as Castanozoster thoracicus (note change in
variable endings because Castanozoster is
masculine). I see no alternatives to
this treatment given the phylogenetic data so far and thus strongly recommend a
Yes on this one.  Barker et al. (2015)
estimated the divergence time at ca. 5 MYA.
730.14.  Recognize Microspingus
Taczanowski, 1874 (type species = trifasciatus),
for Hemispingus trifasciatus and
merge Poospiza cabanisi, P. lateralis, P.
erythrophrys, P. alticola, P. torquata, P. cinerea, and P. melanoleuca into Microspingus.  In Fig. 3, you can see that
this group is strongly supported, as is its sister relationship to Nephelornis and Urothraupis.  Hemispingus trifasciatus is deeply
embedded in this group.
A YES vote
on 730.14 would be to treat all these species in Microspingus, i.e.
Microspingus trifasciatus, M. cabanisi, M. lateralis, M. erythrophrys, M.
alticola, M. torquatus, M. cinereus, and M. melanoleucus, as in Dickinson
& Christidis (2014).  (Note
changes in variable endings because Microspingus
is masculine.) The only alternative to this treatment would be to also include Nephelornis and Urothraupis in Microspingus;
thus, I strongly recommend a Yes on this one.
730.15.  Merge Oreomanes
into Conirostrum. 
As you can see in Fig. 3, Oreomanes
fraseri is deeply embedded in Conirostrum,
and to retain monotypic Oreomanes
would require recognizing 4 additional genera for species currently placed in Conirostrum.  Although at first the placement of the
distinctive, bark-foraging specialist Oreomanes
might seem a surprise, it shouldn’t be. 
Not only is its plumage similar to Conirostrum
but it has also hybridized with the most similar species in plumage, C. ferrugineiventre (Schulenberg 1985).
Unfortunately, fraseri is “preoccupied” in Conirostrum
by C. cinereum fraseri; the next oldest available name is Oreomanes binghami Chapman, and so the
species becomes Conirostrum binghami.
A YES vote on 730.15 would be to
treat Oreomanes fraseri as Conirostrum binghami. I see no
alternatives to this treatment given the phylogenetic data so far and thus
strongly recommend a Yes on this one.
730.16.  Recognize newly named genus Ephippiospingus for Phrygilus dorsalis and P.
erythronotus and recognize newly named genus Chionodacryon for Diuca
speculifera.  The genus Phrygilus
is perhaps the most highly polyphyletic genus in the tanagers.  Most of us suspected this already, but the
degree to which Phrygilus species are
scattered between and within subfamilies is unprecedented (see Figs. 1 and 4,
and 730.01).  Diuca is also not monophyletic (see Fig. 4; type species = D. diuca).  As can be seen in Fig. 4, these three species
plus Idiopsar brachyurus form a
strongly supported clade.  Burns et al.
reasoned that naming two new genera was better than merging all four species
into Idiopsar on the basis of the
unique bill and foraging behavior of the latter.
A YES vote on 730.16 would be to
treat Phrygilus dorsalis and P. erythronotus as Ephippiospingus dorsalis and E.
erythronotus, and to treat Diuca
speculifera as Chionodacryon speculiferum (note the required change in a variable
ending). 
A NO vote would endorse the treatment rejected by Burns et al., i.e.
all four species placed in Idiopsar,
as in Burns et al.’s Table 1, Alternative 2. 
I strongly prefer the latter treatment and thus I recommend a NO on this
subproposal.  Not only would inclusion of
all species in Idiopsar avoid
recognizing two new genera, one of which is monotypic, but it would also group
together four high-elevation species of the southern Andes that share overall
gray plumage and similar size.  As for
the unique bill shape and foraging behavior of Idiopsar, the same could be said for Oreomanes (see 730.15), which Burns et al. merged in Conirostrum (which I support).  Finally, Idiopsar
brachyurus and Diuca speculifera are extremely close genetically (closer than
almost any two species in the phylogeny), to the point that recognition of Chionodacryon as monotypic is not
supported by genetic distance. Another potential solution would be to include speculifera in Idiopsar while recognizing Ephippiospingus.  Barker et al. (2015) estimated the age of the
node that unites all four species at ca. 4 MYA, and so they are all well within
the range of groups included in a single genus.
730.17.  Resurrect Geospizopsis
Bonaparte 1856 for Phrygilus unicolor and P. plebejus. 
As can be
seen in Fig. 4, these three species plus Haplospiza
unicolor and extralimital Acanthidops
bairdi form a strongly supported group. 
Of great surprise (to me anyway) is that the two traditional Haplospiza are not sister
species, with rustica sister to Acanthidops. 
Although the support for this is strong, it is not 100%, and the
position of Haplospiza unicolor
within the group is uncertain.
A YES vote on 730.17 would be to
treat Phrygilus unicolor and P. plebejus as Geospizopsis unicolor and G.
plebejus.  This would leave our
current Haplospiza as likely paraphyletic,
but that is preferable, temporarily, to retaining a polyphyletic Phrygilus until the problem with
homonymy (see below) is solved.  A NO
vote would be for an alternative treatment, e.g. to treat all 5 species in a
single genus (Haplospiza Cabanis 1851
has priority over Acanthidops Ridgway
1882), as in Burns et al.’s Table 1, Alternative 2.  I actually prefer the latter treatment.  I have a difficult time with the two species
of current Haplospiza being in
different genera, which would not be diagnosable on morphological grounds. These
two plus Acanthidops are bamboo
specialists, and there seems to be a remote chance that additional genetic data
might actually group the three species. 
The two former Phrygilus also
share with the three bamboo specialists an all-gray plumage, and the five
species together differ primarily in bill shape.  Barker et al. (2015) estimated the age of the
node that unites H. rustica and Acanthidops at ca. 4 MYA, the age of the
divergence between them and Geospizopsis at
ca. 5.5 MYA, and the age of the node that unites all 5 taxa, including Haplospiza unicolor, at ca. 6.5
MYA.  Thus, lineage age are does not
provide any clear guideline here; certainly an expanded Haplospiza would fit with the ages estimated for most genera in
tanagers.  However, the main problem for a
single genus treatment is one of nomenclature: in an expanded Haplospiza, Phrygilus unicolor was described (as Emberiza unicolor Lafresnaye & d’Orbigny 1837) before Haplospiza unicolor (1851), and so that
mess would have to be sorted out in a separate publication.  A new name would be required for Haplospiza unicolor, a name that has
been in use for nearly 170 years.  Therefore,
I recommend a YES vote (resurrect Geospizopsis,
retain Haplospiza as currently
constituted) just as a temporary solution while nomenclature is sorted out.
730.18.  Recognize a
monotypic Tephrophilus Moore 1934 for
Buthraupis wetmorei; recognize
monotypic Sporathraupis Ridgway 1898
for Thraupis cyanocephala; and continue
to recognize Anisognathus as
monophyletic despite lack of support.  In Fig. 5, you can
see there is a group of montane tanagers, including all species in our current Buthraupis and Anisognathus plus Chlorornis
and “Thraupis” cyanocephala, that has mixed support (Bayesian PP 1.0 but Maximum
Likelihood bootstrap only 69); within this group the topology is largely
unresolved.  This was the subject of
now-tabled SACC proposal 569 (see for valuable discussion). 
There is a 6-way polytomy: (1) Buthraupis/Tephrophilus wetmorei; (2) Buthraupis montana (the type species of Buthraupis);
(3) Thraupis/Sporathraupis cyanocephala;
(4) Chlorornis + Cnemathraupis eximia and C. aureodorsalis
(note that we already approved recognition of Cnemathraupis); (5) Anisognathus
somptuosus + A. notabilis; and (6) Anisognathus
melanogenys, A. lacrymosus, and A.
igniventris.  Burns et al. recommend the
solution as stated in 730.18; concerning the problem with lack of support for
monophyletic Anisognathus, they stated: “In addition, support for a few genera (Anisognathus, Certhidea, and Sicalis)
was equivocal. Because there was neither support for or against monophyly in
these cases, we retained the current genus assignment, pending further data.” 
Hellmayr (1936) recognized Poecilothraupis
Cabanis 1851 for these three species and Compsocoma
Cabanis 1851 for somptuosus and notabilis.
A YES vote on 730.18 would support
treatment of Buthraupis wetmorei as Tephrophilus wetmorei, Thraupis cyanocephala
as Sporathraupis cyanocephala, and Buthraupis eximia and B. aureodorsalis as Cnemathraupis eximia and C.
aureodorsalis, and maintain Anisognathus
as currently defined (all as in in Dickinson
& Christidis 2014).  In Table
1, Burns et al. provided an alternative treatment, namely combining all of
these genera with Dubusia, Pseudosaltator, and Pipraeidea (with Pipraeidea
having priority).  The unstated rationale
for this was to expand the boundary of the genus to encompass the first
strongly supported node (BPP = 1.0, MLB = 96). 
This alternative would produce an exceptionally heterogeneous genus and
would likely be unpalatable.  However, I
like an intermediate solution, namely combining the six branches that form a
polytomy into a single genus: Chlorornis
Reichenbach 1850 has priority.  Given the
uncertain relationships within this group, combining them all into a single
genus, at least until relationships within the group are better resolved, has
some appeal.  Although heterogeneous in
plumage, they are roughly similar in size and bill shape, and they share an Andean
cloud-forest distribution. Also, to recognize an expanded Chlorornis would (1) avoid maintaining Anisognathus, for which there is no support for monophyly (and was
not considered monophyletic by Hellmayr), and (2) avoid resurrecting 3 genera (Cnemathraupis, Sporathraupis, Tephrophilus),
two of which would be monophyletic.  Barker
et al. (2015) estimated that the age of the node that unites this group at
about 8 mya, so this fits nicely the age of taxa ranked as genera in tanagers;
however, most of the divergence among lineages that Burns et al. proposed as
genera are also fairly old, ca. 6 MYA (in other words, relatively little recent
divergence), so either recommendation fits my scheme of using lineage age as a guide
in delimiting genera.  A disadvantage of
a single genus is that it would create nine novel combinations with Chlorornis, which is also the only
almost-all-green species in the group.  I
lean towards a NO vote on this subproposal but will decide based on comments.
730.19.  Resurrect Ixothraupis
Bonaparte 1851 (type species = Tangara
punctata), for Tangara punctata, T. varia, T. rufigula, T. xanthogastra, and T. guttata. 
In Fig. 5, one can see that traditional Tangara (type species = chilensis)
is not monophyletic because Thraupis
is embedded within it.  As Burns et al.
(2016) noted, their previous suggestion to merge Thraupis and Tangara was
not adopted by anyone, and so Burns et al.’s (2016) solution was to maintain Thraupis by dismembering Tangara. 
Although many of us will mourn the loss of broadly defined Tangara, that classification is really a
Meyer de Schauensee (1966) construct, and previous classifications (e.g.,
Hellmayr 1936) divided the genus into Tanagra
and Calospiza.  The 5 species in Ixothraupis form a strongly supported group, as would be predicted
from shared plumage patterns.
A YES vote on 730.19 would support
treatment of Tangara punctata, T. varia,
T. rufigula, T. xanthogastra, and T.
guttata as Ixothraupis punctata, I.
varia, I. rufigula, I. xanthogastra, and I. guttata.  This is
consistent with the data and required to keep a pruned Tangara and Thraupis
monophyletic; I recommend a Yes on this one. 
Barker et al. (2015) estimated the divergence time between this lineage
and the rest at ca. 6 MYA, so this fits within the range of the age of genera
in tanagers.
730.20.  Recognize newly named Poecilostreptus for Tangara palmeri (and extralimital T. cabanisi); resurrect Chalcothraupis Bonaparte 1851 for Tangara ruficervix; and recognize newly
named Stilpnia for Tangara cyanoptera, T. larvata, T.
nigrocincta, T. cyanicollis, T. preciosa, T. peruviana, T, meyerdeschauenseei,
T. vitriolina, T. cucullata, T. cayana, T. viridicollis, T, phillipsi, T.
argyrofenges, and T. heinei. 
See 730.19 for the need to break up Tangara
to maintain Thraupis.  As one can see in Fig. 5, these changes are
required within the section of the tree that includes Thraupis to maintain that genus. 
Stilpnia is a heterogeneous
group for which the node has substandard MLB support (72) but strong BPP
support (.97); Burns et al. outlined some plumage features that distinguish
members of this group from true Tangara.
A YES vote on 730.20 would support
recognition of Poecilostreptus,
Chalcothraupis, and Stilpnia as
outlined above as well as traditional Thraupis
(minus cyanocephala; see 730.18).  I recommend a Yes on this one.  Barker et al. (2015) estimated the divergence
time among these lineages at ca. 5 MYA, so this fits within the range of the
age of genera in tanagers.
Literature Cited
BARKER, F. K., K. J. BURNS, J. KLICKA, S. M. LANYON, AND I. J.
LOVETTE.  2015. New insights
into New World biogeography: An integrated view from the phylogeny of
blackbirds, cardinals, sparrows, tanagers, warblers, and allies.  Auk 132: 333–348.
BURNS, K. J., A. J. SCHULTZ, P. O. TITLE, N. A. MASON, F. K. BARKER, J.
KLICKA, S. M. LANYON, AND I. J. LOVETTE. 
2014.  Phylogenetics and
diversification of tanagers (Passeriformes: Thraupidae), the largest radiation
of Neotropical songbirds. Molecular Phylogenetics and Evolution 75: 41–77.
BURNS, K. J., P. UNITT, AND N. A. MASON.  2016. 
A genus-level classification of the family Thraupidae (Class Aves: Order
Passeriformes).  Zootaxa 4088: 329–354.
SCHULENBERG, T. S.  1985. An intergeneric hybrid conebill (Conirostrum
X Oreomanes) from Peru.  Pp.
390-395 in "Neotropical Ornithology" (P. A. Buckley et al., eds.).
Ornithological Monographs No. 36.
Van Remsen, October 2016
P.S. Once
the outcomes of these proposals are determined, I will work on a proposal on
revising the linear sequence of genera in Thraupidae.  Fortunately, Burns et al. (2016) already
addressed this and provided a phylogenetic sequence.
========================================================
Comments from Areta: “This is the longest proposal ever seen in SACC and one that shall not be
easily solved, given the many nuances of each subproposal. After spending some
hours reading through the papers and the proposal, I realized that many of the
most conflicting situations for me did arise from newly described or old
monotypic genera that are part of polytomies. Also, I feel that trying to
accommodate a classification recurring almost exclusively to sequence data and
without including natural history (and other) data is very difficult. I've
tried to contribute with other lines of evidence when I felt that the sequence
(and sometimes plumage) data were insufficient to gain a good understanding of
the birds. I am pleased to see the authors of phylogenetic papers taking the time
to propose detailed taxonomic treatments derived from their trees.
“730.01. NO. I prefer an expanded Rhopospina.
Fruticeti, caerulescens, alaudinus
and carbonarius form a coherent group
in terms of plumage (especially when in new plumage, which changes greatly once
worn), shape and bill coloration. Alaudinus
is sometimes strikingly bluish-gray, approaching the unique color of caerulescens, and bibs are more or less
apparent in different individuals or at different times in fruticeti and alaudinus.
In terms of habitat and behavior, they also share important features. All
species sing from exposed dry perches, and at least fruticeti and carbonarius
also make parachuting flights while singing. Structurally, the songs differ
either within Corydospiza, in an
expanded Porphyrospiza or in my
preferred choice of Rhopospina. I
find it very easy and intuitive to accommodate variation in these four taxa as
occurring within a single genus. This also facilitates phylogenetic allocation
of all four species.
“One final note: Porphyrospiza
Sclater & Salvin 1873 is younger than Rhopospina
Cabanis 1851, so I think that the Alternative 2 in Burns et al. 2016 (Table 1,
page 345) including all four species in Porphyrospiza
is an error.”
“730.02. NO. For reasons stated in 730.01.
“730.03. NO to their merger in Saltator.
However, I do not like both under Saltatricula
either. Multicolor and atricollis are very different in
vocalizations, plumage, behavior and sociality. It looks like a case in which
much differentiation has occurred in comparison to other similarly distant
species in the tanager clade.”
“730.04. YES and perhaps NO. Clearly,
all three species need to be removed from Tiaris.
YES to the placement of fuliginosa
and obscura in Asemospiza. However, I have trouble in supporting the relationship
between richardsoni and bicolor to the exclusion of other
possibilities. To me, bicolor sounds
and looks like an Asemospiza. Given
the polytomy in which these taxa are placed, may future genetic studies show
different phylogenetic relationships? I am open to suggestions/interpretations
of this by other SACC members.”
“730.05. YES. I like the idea of keeping Eucometis and Trichothraupis
separate while recognizing Islerothraupis
for this set of ex-Tachyphonus. I've
always had trouble in accommodating all the variation found in Tachyphonus. Having more experience with
the southern birds, my encounters with other species always left me scratching
my head. It is good to see order brought to this.”
“730.06. NO. I am not in favor of recognizing monotypic genera unless
there is a good set of reasons to do so. Given the uncertainties regarding
their placement, I imagine they could be accommodated in Rhodospingus or perhaps even in Lanio.
If these were long-described genera, I might be slightly more convinced of
recognizing them. But in this era, I would like to see better arguments to
erect monotypic genera.”
“730.07. YES. Phylogenetic relationships, biogeographic patterns and
phenotypic data support the treatment of xanthophthalmus
and verticalis in Pseudospingus.”
“730.08. YES? Although an alternative treatment that will also please me
is to see ornata, boliviana and nigrorufa/whitii in Poospiza and hispaniolensis, rubecula,
baeri, garleppi, superciliaris
and goeringi in Compsospiza. If this later alternative is
preferred by others, I would vote for it. If not, I can go with this
"larger-but-smaller" new Poospiza
conception.”
“730.09. YES.”
“730.10. A hesitant YES. See comments on 730.11 below.”
“730.011. YES. Pyrrhocoma
females are very similar to other Thlypopsis,
and vocally, the males also fit nicely in this genus. Thlypopsis pyrrhocoma is an elegant solution to the taxonomic
homonymy between both ruficeps.
“The inclusion of superciliaris
in Thlypopsis adds diversity in shape
and vocalizations to an otherwise reasonably tight group and also makes me
wonder on the need to separate frontalis
and melanotis in Sphenopsis. If we accept superciliaris
in Thlypopsis, why do not accept
those two too? I look forward to receiving input from those who know these
birds in life.”
“730.012. YES. Two neat Andean birds that share the same pectoral
pattern, inverting the colors of the flanks and breast-band.”
“730.013. A mild YES. Again, I would appreciate input on the life of thoracica to inform a better decision.”
“730.014. YES. Here is the other lot of Poospiza-like birds. It makes sense vocally and morphologically to
keep them all under Microspingus.”
“730.015. YES, but YUCK! I do not see
any way out of this. It is sad to see Oreomanes
fraseri becoming Conirostrum binghami.”
“730.016. NO on several grounds. First, all species in this clade are
exclusively high-Andean taxa occurring in a relatively narrow zone, frequently
replacing each other geographically or in terms of habitat. Second, as argued
by Van repeatedly, bill features are extremely plastic and in this case, brachyurus can be understood as just a
version of the other birds with a larger (particularly longer) bill, whereas speculifera is a more boldly patterned
bird than the other species. Third, facial patterns (white crescent below the
eye, faintly mottled or striped ocular region, red eyes of variable intensity),
white throats and gray bellies are very similar among all four species. Fourth,
except for the reddish back of dorsalis
(and juvenile erythronotus) these are
mostly gray birds. Fifth, all species seem to sing during a short period of
time and remain vocally little known and all have various similar high-pitched
and squeaky calls. Sixth, the glacier-nesting speculifera has taken an extreme evolutionary path in this, as much
as brachyurus took the road to a
humongous bill and dorsalis is
restricted to above 4000 m asl (at least in Argentina, but possibly also
elsewhere?). All in all, despite their extremes, I find many similarities among
these four birds that make it unjustified to have three genera for them. Lastly
(and more subjectively), Ephippiospingus
and Chionodacryon are unnecessarily
convoluted names that may cause more trouble than clarity. In sum, I do not
endorse unnecessary over-splitting of a genus that seems to me coherent: I
support placing all the species in Idiopsar.”
 “730.018. Difficult
proposal in the face of an enduring polytomy. However, I will follow the
treatment that I endorsed in Proposal 569, which implies
resurrecting several old genera.
--Sporathraupis: given the long branch and distinctive morphology, Sporathraupis cyanocephala seems the way
to go.
--Tephrophilus: in the recent paper by Barker et al. (2015) Tephrophilus wetmorei was
found to be sister to Buthraupis montana,
making it possible for it to be retained in Buthraupis.
Nevertheless, even if part of a polytomy, long branches and very different
external appearance support the inclusion of wetmorei in a different genus.
--Compsocoma:
Compsocoma (with somptuosus and notabilis)
is separated from the remainder of Anisognathus
by deep branching and is morphologically coherent (yellow nape and plain-black
face without facial markings), thus I favor its recognition, which is also
consistent with treatment of other genera in the group.
--Cnemathraupis: recognize this genus for aureodorsalis and melanogenys.”
“730.019. YES. Plumage and natural history data support their collective
placement in Ixothraupis.”
“730.020. YES. Seems a reasonable way to sort the distinctive "black
collared" Poecilostreptus palmeri and cabanisi, accommodate the oddly patterned Chalcothraupis ruficervix
and place the remaining ex-Tangara.”
Comments
from Robbins:
“730.01. NO.  I agree with Nacho that an expanded Rhopospina, with the caveat that perhaps
Rhopospina may have priority over Porphyrospiza, is the better choice with
dealing with this group of birds.
“730.02.
NO, for the reason pointed out by Nacho.
“730.03.
NO, to the merger of multicolor and atriceps into Saltator for reasons mentioned in earlier proposals coupled with
the new genetic data and timing of the split from the rest of Saltator.
“730.06.
NO.  I totally agree with Nacho’s
philosophy about recognizing monotypic genera. 
Moreover, the relationships are clearly unresolved, so I prefer we wait
until more data arise.
“730.07.
YES.  This makes total sense in placing xanthophthalmus and verticalis in Pseudospingus,
as they clearly are quite distinct in all facets from other “Hemispingus”.
“730.10.
A tentative YES, as I can easily be convinced with including these two species
in an expanded Thlypopsis.
“730.11.
YES, for merging Pyrrhocoma and superciliaris into Thlypopsis. Like Van, I’m surprised that superciliaris is closely related to ruficeps, ornate, and pectoralis.
“730.13.
YES. There does not seem to be an alternative, so concur with the new genus Castanozoster.
“730.15. YES.  Unfortunately by having to also change the
specific name makes the English name the only stability of this wonderful
taxon!  Jeez……
“730.16.
NO.  I agree with the comments of Van and
Nacho concerning why these taxa should all be included in Idiopsar.
 “730.18. Clearly whatever we do here is
tentative.  I support placing cyanocephala in Sporathraupis. Given that Barker et al. (2015) subsequently found
that wetmorei is sister to montana, I do not support resurrecting a
new genus for it, i.e., for now, maintain wetmorei
in Buthraupis. We continue to place aureodorsalis and eximia in Cnemathraupis
and recognize Anisognathus.  This provides the most stability until we
have the final word on relationships within this clade.
Comments
from Stiles:
“730.01: resurrect Rhopospina
for ”Phrygilus” fruticeti: YES.
It is clearly distinct genetically and phenotypically from the other species of
this clade.
“730.02: Resurrect Corydospiza
for “P.” alaudinus and carbonarius:
YES. The proposal is not clear on whether caerulescens
should be included: however, similar color differences also occur in Diglossa and in this case, the genus
would have to be Porphyrospiza by
priority.
“730.03: NO. Include both species in Saltatricula, which clearly merits
generic status.
 
“730.04: YES: Merge the two ”Tiaris” into Asemospiza
and merge bicolor into Melanospiza. This is definitely
preferable to sweeping under the rug the great genetic and phenotypic variation
in the rest of this clade in a virtually undiagnosable Tiaris. Here, I prefer being flexible with regard to branch lengths
and estimated ages, and the status quo is clearly not acceptable either.
“730.05: YES. Clearly these cannot be maintained in Tachyphonus s.s., and the “typical” black-below Tachyphonus plumage is subject to much
homoplasy (such homoplasy is also evident 
among  the genera of
hummingbirds).
“730.06: YES. Genetic data favor monotypic genera for Maschalethraupis surinamus and Chrysocorypha delattrei, and no
alternative treatment is reasonable with  the data available.
“730.07: YES. The close affinity of these two canopy
species has long been suspected and they cannot be included in Hemispingus, so resurrecting
Pseudospingus is the best choice.
“730.08: YES. The difference in bill sizes does not
disturb me as it is clearly a flexible character related to diet shifts, which
have occurred in several other tanager genera; Poospiza as reconstituted thus seems preferable to more generic
splitting in this clade.
“730.09: YES. These four species form a well-supported
genus genetically.
“730.10: YES to resurrecting Sphenopsis for these two species; they represent an appropriately
old lineage distinct from Thlypopsis and
are ecologically similar, although in my experience, melanotis seems to like areas with more bamboo while frontalis seems more indifferent.  I disagree with Mark on including these two
larger and heavier-bodied species in Thlypopsis,
which increasingly would verge on undiagnosability.
“730.11: YES, but with one reservation - I hope that
the phenotypically discordant (in Thlypopsis)
genetic sample of “Hemispingus” superciliaris is supported by a suitably
vouchered and identified specimen – this should be checked and if necessary,
repeat this analysis with a duly vouchered specimen. (Such a case with a
mislabeled genetic sample did occur with a hummingbird, so best to be sure).
“730.12: YES, given the strong support for placing
both in Poospizopsis and the
impossibility of including these two species in Poospiza, as redefined above.
“730.13: YES to a monotypic Castanozoster.  Cypsnagra and Donacospiza are sufficiently distinct genetically, ecologically and
phenotypically that a merger would produce a totally undiagnosable genus.
“730.14: YES to including these seven species in a
resurrected Pseudospingus, which is
well supported and both its nearest relations, Nephelornis and Urothraupis,
are sufficiently distinct to continue as monotypic genera. The “cascade” of
branch lengths in this group would make any further splitting within it
arbitrary.
“730.15: YES; O.
fraseri is best considered an ecologically and dietarily specialized Conirostrum, and the change in the
species name is thus mandatory.
“730.16: NO. 
Including all four species in Idiopsar
seems the best choice, as all four form a fairly coherent group,
phenotypically and biogeographically; as in the previous case, the unusual bill
of I. brachyurus presumably
represents a relatively recent dietary shift (cf. Conirostrum).  The most
feasible alternative to me would be a two-genus split: Idiopsar for brachyurus and
speculifera, Ephippiospingus for dorsalis and erythronotus.
 “730.18: Yes,
at least in part. Another study places wetmorei
and montana as sisters, but the
relationship is not close; given the very different plumages, I favor
recognizing Tephrophilus as distinct
from Buthraupis. Sporathraupis should
also be recognized as a separate genus: it certainly is not a Thraupis, and its plumage and bill also
differ from the remainder of this
polytomy.  However, I also strongly favor
recognizing Compsocoma as distinct
from Anisognathus; it is well
characterized by plumage, ecology and morphology and genetically, it seems quite distinct from the “true” Anisognathus. The split of Chlorornis
from the two Cnemathraupis appears
more recent and is therefore somewhat more debatable. Given its completely
different coloration including the bill, I lean towards maintaining the two
genera to facilitate diagnoses; this also is better for maintaining
stability.  However, all three are
seemingly similar in morphologically, o I could also live with an enlarged Chlorornis, despite the color clash.
“730.19: YES to recognizing Ixothraupis; its species share a distinctive plumage pattern; this
split also makes the partial dismemberment of Tangara and maintenance of the vocally and morphologically
distinctive Thraupis consistent with
the genetic data.
“730.20: YES to recognizing Poecilostreptus, Chalcothraupis and Stilpnia to complete the generic rearrangement of the species of Tangara. Both Poecilostreptus and Stilpnia are
well characterized genetically and by plumage; a monotypic Chalcothraupis for ruficervix
is justified by its lack of close relatives as well as its distinctive
plumage and bill shape.  For those that
bemoan the “loss” of Tangara,
consolation remains: it is still the second-largest largest genus in the
Thraupidae, only exceeded by Sporophila!
Comments from Pacheco:
“730.01.
YES. Based on the phenotypic and genetic divergences, and especially the age of
separation in the clade.
730.02.
YES. However, it is necessary - as alerted by Gary - to decide how to
subordinate the Blue Finch. Corydospiza Sundevall, 1872, takes
precedence over Porphyrospiza Sclater & Salvin, 1873.
730.03.
NO. Preferring once again to keep both species apart, in Saltatricula
730.04.
YES. It seems to me <<merge the two "Tiaris" into Asemospiza
and merge into bicolor Melanospiza >> is preferable. Both genera
with only two species.
730.05.
YES. From direct field experience, it seems to me quite natural to gather these
3 taxa in a separate genus Islerothraupis.
730.06.
YES. Unless a broad genus is maintained, I consider the evidence satisfactory
at present for the treatment of these taxa in monospecific genera.
730.07.
YES. Recognizing Pseudospingus seems well supported decision.
730.08.
YES. In this case, I vote by “simpler approach that does not require two
additional new generic names”.
730.09.
YES. The treatment of these four taxa under this new genus is well supported.
730.10.
YES. Based on Gary's comment.
730.11.
YES. In my experience with "Pyrrhocoma" ruficeps, I
find quite plausible to combine it with Thlypopsis sordida, the only
member of the genus that I know in field but type of this genus
730.12.
YES. Well-founded support for placing both taxa in Poospizopsis.
730.13.
YES for a monotypic Castanozoster. Put in perspective, thoracica
is even fairly distinct from the traditional "Poospiza", at least of
the Brazilian species that I know.
730.14.
YES. The set of taxa under Microspingus is basically a well-interrelated
group.
730.15.
YES. A double change (name of genus, name of species) but clearly necessary.
730.16.
NO. For the reasons put forward by Van: Idiopsar brachyurus and Diuca
speculifera being extremely close genetically, my vote is for the
maintenance of all 4 taxa in Idiopsar ­– the oldest available name for
this set.
730.18.
An almost YES. I give my vote for the recognition of Tephrophilus,
Sporathraupis, Cnemathraupis, but also of Compsocoma.
730.19.
YES. A set very well correlated from among "Tangara".
730.20. YES. The maintenance of the distinctive Thraupis
outside of Tangara requires all these arrangements.”
Comments from Claramunt:
“730.01. NO. I agree
with Nacho and Mark. Merging these four species into a single genus makes
better sense and would result in a fairly coherent genus (habitat, bluish
plumage, yellow bill), avoids the resurrection of a monotypic genus and
eliminates an additional one. Not impressed by the estimated crown age of the
clade; not much older than Incaspiza, for example. Rhopospina
Cabanis 1851 has priority over Porphyrospiza Sclater & Salvin, 1873,
for the expanded genus.
730.02. NO. See above.
730.03. NO to merge Saltatricula into Saltator.
Although Saltatricula is sister to S. atricollis, atricollis
itself is an “aberrant” Saltator and given the diversity already
contained in Saltator and the position and distance of the Saltatricula/atricollis
clade, I think it is better to maintain Saltatricula, containing multicolor
and atricollis, as a separate genus. Although different in size, S.
atricollis and S. multicolor share some similarities, including bill
shape and color and a mostly-black face that makes them a coherent group, if
not homogeneous.
730.04. YES to both changes regarding the disintegration of former Tiaris.
Genetic data seems robust, taxonomic changes unavoidable.
730.05. NO to recognize the new genus Islerothraupis. Instead, I
see the opportunity to get rid of two questionable monotypic genera based
mostly on plumage and taxonomic uncertainty (Trichothraupis and Eucometis)
by merging them with the “Islerothraupis” clade to form an expanded Trichothraupis.
The result would be a somewhat diverse but coherent genus in terms of behavior
and morphology. I’m emphasizing the similarities across species (bill shape,
elongated crown feathers, plumage patterns) over the differences. I think it
would be a better use of the “genus” category in this highly diverse and
complex tanager taxonomy.
730.06. YES to recognize new monotypic genera Maschalethraupis
but NO to recognize Chrysocorypha. Relationships are still unresolved
but I’m willing to accept the new genus for surinamus given the
phylogenetic evidence so far. However, delatrii may be sister to Rhodospingus
(Burns et al. 2014, albeit with no statistical support) and thus the most
conservative solution is to include delatrii in Rhodospingus
instead of erecting a new monotypic genus, at least until relationships are
resolved with more confidence.
730.07. Reluctant YES to resurrect Pseudospingus for Hemispingus
xanthophthalmus and H. verticalis. There is some signal of them
being sister to Cnemoscopus (Burns et al. 2014) thus placing them in
that genus may have been a more conservative solution. Phenotypic, behavioral
and ecological similarities are evident. But given the uncertainty and that a
name is already available, resurrecting Pseudospingus is a sensible
solution right now.
730.08. YES to the redefinition of Poospiza. Clade support is not
super high but the group makes sense phenotypically, although still
heterogeneous in size and color. Splitting the group into two genera, as Nacho
suggested, is another possibility. If P. hispaniolensis grouped with the
nigrorufa clade, I will be inclined to favor the two-genera solution but
given the current tree, I prefer the more widely defined Poospiza
suggested by Burns et al.
730.09. YES to recognize Kleinothraupis.
730.10. Reluctant YES to resurrecting Sphenopsis. The
homogeneity of Thlypopsis is already disturbed by the inclusion of Pyrrhocoma
and H. superciliaris. If we accept the new more-heterogeneous Thlypopsis,
the inclusion of melanotis and frontalis in it would not add much
heterogeneity to the group.
730.11. YES to merging Pyrrhocoma ruficeps and Hemispingus
superciliaris into Thlypopsis.
730.12. YES to resurrecting Poospizopsis for Poospiza
caesar and P. hypochondria. The alternative of merging all four taxa
into a single genus would result in a genus that makes no sense phenotypically
or ecologically.
730.13. YES. Let’s concede a new genus to this phylogenetic
refugee.
730.14. YES to recognize Microspingus.
730.15. YES to merge Oreomanes into Conirostrum.
Fascinating result.
730.16. NO. I fully agree with the arguments presented by Van and Nacho.
I prefer to include these taxa in Idiopsar.
730.18. NO. This is a case where a “radical” solution such as treating
all taxa under Chlorornis makes more sense than trying to saves some
traditional generic names at the cost of erecting some new ones leading to
multiple monotypic genera and small genera with no consistent diagnosable
traits. After seeing the phenotypic heterogeneity of other genera in the new
classification, the heterogeneity within the new expanded Chlorornis is
about normal.
730.19. YES to resurrect Ixothraupis. It helps solving the
“Tangara/Thraupis” issue and the resultant genus is cohesive.
730.20. NO to the recognize Poecilostreptus and Chalcothraupis
but yes to split the clade between Thraupis and Stilpnia
(although I don’t like the name because it is difficult to pronounce). I don’t
see ruficervix and palmeri distinct enough to deserve their own
genera so the argument rests solely on phylogenetic uncertainty, which is not a
sufficient reason by itself, in my opinion. A conservative solution would be to
include ruficervix in Thraupis and palmeri in Stilpnia,
as there is some phylogenetic signal for that (see fig. 6 in Burns et al.
2014).”
Comments from Jaramillo: “I should first say that this was a beautifully
well done proposal!
730.01: “YES, fruticeti
is quite an unusual bird, quite unlike alaudinus
in the other group. Not only in the very large size and overall bulk, but also
the voice is almost icterid like. It does stand alone, at least knowing the
live bird.”
730.02: “NO, I prefer an
expanded Porphyrospiza.”
730.06: “NO. Maybe I am
misunderstanding, but doesn’t the data suggest that delatrii is
sister to Rhodospingus? Why not merge it with Rhodospingus,
and leave surinamus in the new genus?
730.10: “YES resurrect, Sphenopsis.
Although I am not averse to expanding Thlypopsis.”
730.12: “NO. Donacospiza always
seemed like a “Poospiza” to me, of course that means little now that we
have sorted out Poospiza in a different format. However, the
oddball in this group is Cypsnagra, yet it is clearly in the group.
I don’t know what to do exactly, but it seems to me that uniting these four,
although unpalatable, may be the best thing to do. By the way, that specimen
of Donacospiza may be a juvenile, the adult would look a lot
more like two of the four of this group with an obvious supercilium etc.
730.16:
“YES/NO. YES, recognize Ephippiospingus for dorsalis and erythronotus.
I am unclear if they are not actually the same species! Juvenile erythronotus have
reddish backs, similar to dorsalis. But that will need more
research. HOWEVER, on the second part of this I am very happy that the data
bear out something that I have been seeing in the field for years, i.e.
that speculifera is no Diuca! But rather than give
it its own genus, it is clearly fine in Idiopsar. Now, Idiopsar has
an odd bill, but this is an incredibly plastic trait. In the field, and even if
you look at photos, the look of Idiopsar is similar to that of
“Diuca” speculifera, particularly so in the face pattern
with the pale area below the eye, and the overall gray color. Including speculifera in Idiopsar is
actually preferable.
730.18: “YES. Not a strong
vote on my part, the additional genera are more palatable to me that lumping
all in Dubusia for example.”
730.19: ““YES,
resurrect Ixothraupis. Morphologically not that far off, and fits
the molecular data.”