Showing posts with label Turdidae. Show all posts
Showing posts with label Turdidae. Show all posts

Monday, January 29, 2024

[Ornithology • 2023] Catharus arcanus, C. fuscater, C. mirabilis, etc. • Integrative Taxonomy reveals Hidden Diversity in the Catharus fuscater (Passeriformes: Turdidae) complex in Central and South America


 Darién Nightingale-thrush Catharus arcanus
 Halley, Catanach, Klicka & Weckstein, 2023
 

Abstract
We assembled datasets of genetic (genomic ultraconserved elements [UCEs], mtDNA) and phenotypic (morphology, voice) characters to address species limits and taxonomy in the slaty-backed nightingale-thrush Catharus fuscater (Passeriformes: Turdidae), a polytypic complex of songbirds with a broad montane distribution in Central and South America. We identified 10 allopatric populations that have been evolving independently for multiple glacial cycles. Genetic structure is broadly correlated with divergence in phenotypic characters, including plumage colour, iris colour, maxilla (bill) colour, and the acoustic structure of vocalizations (calls and songs). We propose an integrative taxonomic revision that recognizes seven species in the complex, including a newly described species from eastern Panama, and four subspecies, of which two are newly described.

phylogenetics, Neotropics, nightingale-thrush, systematics






 ... taxonomic revision splits the C. [fuscatercomplex into 7 species, of which 1 is newly described, and 4 subspecies, of which 2 are newly described. We also proposed new English names for each species. They are …

1. Talamanca Nightingale-thrush (Catharus hellmayri
– monotypic – 
Northern mountains of Costa Rica (Rincón de la Vieja, Miravalles, Tenorio) to west-central Panama (Parque Nacional Santa Fé, Veraguas). 


2. Darién Nightingale-thrush (Catharus arcanus, sp. nov.
– monotypic –
 E Panama, endemic to Serranía de Majé and Serranía del Darién, from Cerro Azul in the west, to Cerro Tacarcuna in the east 


3. Pirre Nightingale-thrush (Catharus mirabilis
– monotypic –
 Endemic to Cerro Pirre, Darién province, E Panama 
(Photo: ML 242929041) 


4. Cordilleran Nightingale-thrush (Catharus fuscater
– polytypic –
 (1) C. f. sanctaemartae, endemic to Sierra Nevada de Santa Marta, NE Colombia; 
(2) C. f. fuscater, Sierra de Perijá of Venezuela, N and E Andes of Colombia and Venezuela. 
(Photo: ML 206115721) 

5. Trans-Andean Nightingale-thrush (Catharus berlepschi
– polytypic –
 (1) C. b. berlepschi, W Andes in Ecuador; 
(2) C. b. caniceps, W Andes in Ecuador, S to NW Peru; 
(3) C. b. nebulus, ssp. nov., E Peruvian Andes. 
(Photo: ML 38468741)


6. Antioquia Nightingale-thrush (Catharus opertaneus
– polytypic – 
(1) C. o. opertaneus, NW and Central Andes in Colombia, S to Napo, Ecuador; 
(2) C. o. tenebris, ssp. nov., Río Chinchipe watershed of N Peru and SE Ecuador 


7. Cochabamba Nightingale-thrush (Catharus mentalis
– monotypic –
 S Peru, east of the Río Apurímac, E to Santa Cruz, Bolivia





Matthew R. Halley, Therese A. Catanach, John Klicka and Jason D. Weckstein. 2023. Integrative Taxonomy reveals Hidden Diversity in the Catharus fuscater (Passeriformes: Turdidae) complex in Central and South America. Zoological Journal of the Linnean Society. 199(1); 228–262. DOI: 10.1093/zoolinnean/zlad031


Thursday, January 28, 2016

[Ornithology • 2016] Integrative Taxonomy of the Plain-backed Thrush (Zoothera mollissima) complex (Aves, Turdidae) reveals Cryptic Species, including A New Species, Zoothera salimalii, from the eastern Himalayas


Himalayan Forest Thrush | Zoothera salimalii
 Alström, Rasmussen, Zhao, Xu, Dalvi, Cai, Guan, Zhang, Kalyakin, Lei & Olsson, 2016
   
photo: C. Brelsford    DOI:  10.1186/s40657-016-0037-2

Abstract
Background
The Plain-backed Thrush Zoothera mollissima breeds in the Himalayas and mountains of central China. It was long considered conspecific with the Long-tailed Thrush Zoothera dixoni, until these were shown to be broadly sympatric.

Methods
We revise the Z. mollissimaZ. dixoni complex by integrating morphological, acoustic, genetic (two mitochondrial and two nuclear markers), ecological and distributional datasets.

Results
In earlier field observations, we noted two very different song types of “Plain-backed” Thrush segregated by breeding habitat and elevation. Further integrative analyses congruently identify three groups: an alpine breeder in the Himalayas and Sichuan, China (“Alpine Thrush”); a forest breeder in the eastern Himalayas and northwest Yunnan (at least), China (“Himalayan Forest Thrush”); and a forest breeder in central Sichuan (“Sichuan Forest Thrush”). Alpine and Himalayan Forest Thrushes are broadly sympatric, but segregated by habitat and altitude, and the same is probably true also for Alpine and Sichuan Forest Thrushes. These three groups differ markedly in morphology and songs. In addition, DNA sequence data from three non-breeding specimens from Yunnan indicate that yet another lineage exists (“Yunnan Thrush”). However, we find no consistent morphological differences from Alpine Thrush, and its breeding range is unknown. Molecular phylogenetic analyses suggest that all four groups diverged at least a few million years ago, and identify Alpine Thrush and the putative “Yunnan Thrush” as sisters, and the two forest taxa as sisters. Cytochrome b divergences among the four Z. mollissima sensu lato (s.l.) clades are similar to those between any of them and Z. dixoni, and exceed that between the two congeneric outgroup species. We lectotypify the name Oreocincla rostrata Hodgson, 1845 with the Z. mollissima sensu stricto (s.s.) specimen long considered its type. No available name unambiguously pertains to the Himalayan Forest Thrush.

Conclusions
The Plain-backed Thrush Z. mollissima s.l. comprises at least three species: Alpine Thrush Z. mollissima s.s., with a widespread alpine breeding distribution; Sichuan Forest Thrush Z. griseiceps, breeding in central Sichuan forests; and Himalayan Forest Thrush, breeding in the eastern Himalayas and northwest Yunnan (at least), which is described herein as a new species. “Yunnan Thrush” requires further study.

Keywords: Systematics, Morphology, Bioacoustics, Altitudinal distributions, Genetic distances, Undescribed taxa, Zoothera dixoni, Lectotypification, Holotype


Fig. 5 Alpine Thrush Zoothera mollissima sensu stricto, Niubei Shan, Sichuan, China, mid June (Chao Zhao; same individual as in Figs. 6, 9, IOZ 20890 and probably also AV19499) (a, e, i, l); Himalayan Forest Thrush Z. salimalii, sp. nov., Dulongjiang, Yunnan, China, mid June (Per Alström; same individual as in Fig. 10, IOZ 19659 and AV19235) (b, f, j, m); Dulongjiang, Yunnan, China, mid June (Per Alström; same individual as in Fig. 10, IOZ 19658 and AV19240) (d, g); Sichuan Forest Thrush Z. griseiceps, Jiuding Shan, Sichuan, China, mid May (Per Alström; same individual as in Fig. 12, IOZ 20222 and AV19505) (c, h, k); Vietnam, 24 December 1929, holotype in BMNH (Per Alström) (n)

Himalayan Forest Thrush Zoothera salimalii, sp. nov.,  Dulongjiang, Yunnan, mid June 
photo: C. Brelsford    DOI:  10.1186/s40657-016-0037-2


Etymology: We name this new species for Dr Sálim Ali, in honor of his huge contributions to the development of Indian ornithology and conservation.

Status and conservation of all taxa: As the Alpine Thrush is widely distributed and its habitat is not under threat, it should be considered as being of least concern. Zoothera salimalii is locally common in West Bengal and Arunachal Pradesh, India, and locally abundant at Dulongjiang, Yunnan province, China. Because it is widely distributed and its habitat is not under any imminent threat (other than forest areas in general), it should be considered as being of least concern. Zoothera griseiceps is only known to breed in a rather small area in Sichuan province, China. However, as it is locally fairly common, and occurs in several protected areas, it is probably not under any imminent threat, at least not on its breeding grounds.


Fig. 7 Himalayan Forest Thrush Zoothera salimalii, sp. nov., Darjeeling District, West Bengal, India (Subrato Sanyal) (a); Baihualing, Yunnan, China, early February (Craig Brelsford; same individual as in Fig. 4, but other side of head; the tail has apparently been accidentally lost and is growing) (b); Darjeeling District, West Bengal, India (Subrato Sanyal; different individual from a) (c); Dulongjiang, Yunnan, mid June (Craig Brelsford; same individual) (d–f)

Conclusion: 
Based on analyses of plumage, morphometrics, mitochondrial and nuclear DNA, song, breeding habitat and geographical distributions, we conclude that Zoothera mollissima s.l. should be split into at least three species, one of which is described here as a new species: Alpine Thrush Z. mollissima s.s., Himalayan Thrush Zoothera salimalii (sp. nov.) and Sichuan Forest Thrush Z. griseiceps, all monotypic. In addition, a distinct lineage, “Yunnan Thrush”, was identified genetically, but as we have no corroborating evidence that it is distinct from Alpine Thrush, we refrain from describing it here. Z. dixoni should be retained as a distinct species.



Per Alström, Pamela C. Rasmussen, Chao Zhao, Jingzi Xu, Shashank Dalvi, Tianlong Cai, Yuyan Guan, Ruiying Zhang, Mikhail V. Kalyakin, Fumin Lei and Urban Olsson. 2016. Integrative Taxonomy of the Plain-backed Thrush (Zoothera mollissima) complex (Aves, Turdidae) reveals Cryptic Species, including A New Species.
Avian Research. 20167:1. DOI:  10.1186/s40657-016-0037-2  

New species of bird discovered in India, China by international team of scientists
Bird has been named the Himalayan Forest Thrush
: A new species of bird has been described in north-eastern India and adjacent parts of China by a team of scientists. The bird has been named the Himalayan Forest Thrush, Zoothera salimalii.

Himalayan Forest Thrush: New Species of Bird Discovered http://saevus.in/blog/himalayan-forest-thrush-new-species-discovered/ via @SaevusWildlife

Himalayan Forest Thrush — New Bird Species discovered in India and China http://www.conservationindia.org/articles/himalayan-forest-thrush
New species of bird discovered in India and China
http://phy.so/372515252 via @physorg_com

Friday, August 31, 2012

[Ornithology • 1999] Speciation in African forest robins (Stiphrornis): species limits, phylogenetic relationships, and molecular biogeography


Stiphrornis e. gabonensis, Gabon Forest Robin (top) and 
Stiphrornis e. erythothorax, Western Forest Robin (bottom)
Source: Catalogue of the birds in the British Museum. Volume 7. 1883
Author: Joseph Smit (1836–1929) | http://en.wikipedia.org/wiki/File:StiphrornisSmit.jpg

Abstract
The monotypic genus Stiphrornis (Aves: Turdidae) is revised under a phylogenetic species concept to include four species, one of which, from the southwest Central African Republic, is new. Mitochondrial DNA sequence data are analyzed to explore the phylogenetic relationships within Stiphrornis. These data indicate relatively high levels of sequence divergence among the species and corroborate their recognition as diagnosable taxa, a conclusion also supported by morphological evidence. These findings, along with the allopatric distributions of the species, compel attention to their phylogenetic and spatial history, which was not explored when this group was ascribed to a single ‘‘biological’’ species.

Data reviewed here also suggest that the northwest Congo Basin forest, where the new species was discovered, is more zoogeographically complex than has been previously suspected. In addition, application of a phylogenetic species concept emphasizes the narrow endemism of S. gabonensis and S. sanghensis, along with its implications for conserving their threatened habitats.

The findings of this paper also reinforce the notion that patterns of geographic variation in the lowland forests of West and Central Africa are still incompletely understood and that the impact of environmental and geological history on the diversification of the forest avifauna has not yet been fully explored.




Beresford, P. & Cracraft, J. 1999. Speciation in African forest robins (Stiphrornis): species limits, phylogenetic relationships, and molecular biogeography. American Museum Novitates. 3270: 1–22.