Tyrannides (1 Viewer)

[andrew147]

Any arguments for splitting Oxyruncus cristatus in two species? Two deeply clades were found by Harvey & al., 2020

I tentatively have as:

Central American Sharpbill Oxyruncus [c.] frater
Amazonian Sharpbill Oxyruncus [c.] hypoglaucus
Peruvian Sharpbill Oxyruncus [c.] sp/ssp nov.
Southeastern Sharpbill Oxyruncus [c.] cristatus

Each lineage is >1 my old. There are still several un-named populations though, so things might change.

 

[Jim LeNomenclatoriste]

I tentatively have as:

Central American Sharpbill Oxyruncus [c.] frater
Amazonian Sharpbill Oxyruncus [c.] hypoglaucus
Peruvian Sharpbill Oxyruncus [c.] sp/ssp nov.
Southeastern Sharpbill Oxyruncus [c.] cristatus

Each lineage is >1 my old. There are still several un-named populations though, so things might change.

I had thought of two species minimum, cristatus and frater, but perhaps future revisions will recognize more

 

[Jim LeNomenclatoriste]

In this figure, Camptostoma obsoletum is polyphyletic. Which subspecific taxon corresponds to the green and red dots?

 

[TomDerutter]

according to TiF:

Beardless-Tyrannulets:Based on Fitzpatrick (2004a), Rheindt et al. (2008d), Harvey et al. (2020),and the HBW Checklist, the Southern Beardless-Tyrannulet, Camptostoma obsoletum,has been split into five species:

• Western Beardless-Tyrannulet, Camptostoma sclateri, including maranonicum and griseum
• Central American Beardless-Tyrannulet, Camptostoma flaviventre, including orphnum and majus
• Colombian Beardless-Tyrannulet, Camptostoma pusillum, including napaeum and perhaps caucae
• Olive Beardless-Tyrannulet, Camptostoma olivaceum, monotypic
• Southern Beardless-Tyrannulet, Camptostoma obsoletum, including bolivianum and cinerascens

Red dot:

• Western Beardless-Tyrannulet, Camptostoma sclateri, including maranonicum and griseum

Green dot:

• Central American Beardless-Tyrannulet, Camptostoma flaviventre, including orphnum and majus
• Colombian Beardless-Tyrannulet, Camptostoma pusillum, including napaeum and perhaps caucae
• Olive Beardless-Tyrannulet, Camptostoma olivaceum, monotypic
• Southern Beardless-Tyrannulet, Camptostoma obsoletum, including bolivianum and cinerascens

 

[Jim LeNomenclatoriste]

according to TiF:



Red dot:

• Western Beardless-Tyrannulet, Camptostoma sclateri, including maranonicum and griseum

Green dot:

• Central American Beardless-Tyrannulet, Camptostoma flaviventre, including orphnum and majus
• Colombian Beardless-Tyrannulet, Camptostoma pusillum, including napaeum and perhaps caucae
• Olive Beardless-Tyrannulet, Camptostoma olivaceum, monotypic
• Southern Beardless-Tyrannulet, Camptostoma obsoletum, including bolivianum and cinerascens

Thank you. For now, I will maintain two species, sclateri and obsoletum pending future revisions. Some suggestions of Boyd are odd, e.g. the split of Mitrephanes phaeocercus in three species while Harvey & al show two deep lineages in this species

 

[Mysticete]

Thank you. For now, I will maintain two species, sclateri and obsoletum pending future revisions. Some suggestions of Boyd are odd, e.g. the split of Mitrephanes phaeocercus in three species while Harvey & al show two deep lineages in this species

He might be bringing additional information in like vocals or such, that are necessarily reflected in Harvey?

 

[Jim LeNomenclatoriste]

He might be bringing additional information in like vocals or such, that are necessarily reflected in Harvey?

🤷

 

[Peter Kovalik]

Proposal (967) to SACC

Transfer the subspecies minor and cinerascens from Myiodynastes chrysocephalus to M. hemichrysus, thereby adding Myiodynastes hemichrysus to SACC list

PASSED (26 November 2023)

 

[Peter Kovalik]

Proposal (956) to SACC

Species limits and generic placement of Phaeomyias murina

(in part). Species limits and generic placement of Phaeomyias murina (Areta) PASSED (26 Nov 2023) Not yet fully implemented pending proposal on English names.

 

[Peter Kovalik]

Proposal (961) to SACC

Treat Tolmomyias viridiceps as a separate species from T. flaviventris

PASSED (4 March 2024)

 

[Peter Kovalik]

Emilio A. Jordan and Juan I. Areta (2024) Biogeography, speciation and niche evolution of doraditos (Aves: Pseudocolopteryx). Zoologica Scripta, published online 01 March 2024.
https://doi.org/10.1111/zsc.12655

Abstract
Ecological and geographical factors shape the current distribution of species. Analysing their interplay in a phylogenetic framework is key to understand the historical processes that have shaped the evolution of a group. Here, we modelled the ecological niches and geographic distributions of the five species of doraditos (Pseudocolopteryx spp.) to study their biogeographic histories, niche evolution and speciation process in a phylogenetic framework. Our potential distribution models uncovered novel range-wide distributional patterns and seasonal movements in the doraditos, where four species are migratory with distinct breeding and non-breeding distributions, and one (P. sclateri) exhibits a complex spatiotemporal distribution indicating nomadism. Ecological niche pairwise comparisons showed that none of the doraditos have equivalent niches and that niche differences are due to species-specific habitat preferences. Phylogenetically weighted geographical and ecological analyses showed patterns of allopatric speciation and niche lability in the evolution of doraditos. The divergence of P. sclateri seems tied to its tropical-to-temperate wetland specialization. The montane P. acutipennis expanded to human-modified lowlands following speciation, highlighting the need to control for post-speciational changes in ecological niche comparisons as done here. In turn, P. dinelliana, P. citreola and P. flaviventris showed essentially allopatric breeding distributions, as a product of environmentally mediated divergence during their speciation processes. The distribution and migration data of the recently diverged cryptic sister species P. citreola and P. flaviventris are consistent with two possible speciation scenarios: peripatric speciation and migration dosing speciation.