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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 41, No. 6, 2020, pp. 656-669
Bioline Code: zr20072
Full paper language: English
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 41, No. 6, 2020, pp. 656-669

 en Mitogenomic phylogeny of the Asian colobine genus Trachypithecus check for this species in other resources with special focus on Trachypithecus phayrei check for this species in other resources (Blyth, 1847) and description of a new species
Roos, Christian; Helgen, Kristofer M; Miguez, Roberto Portela; Thant, Naw May Lay; Lwin, Ngwe; Lin, Aung Ko; Lin, Aung; Yi, Khin Mar; Soe, Paing; Hein, Zin Mar; Myint, Margaret Nyein Nyein; Ahmed, Tanvir; Chetry, Dilip; Urh, Melina; Veatch, E. Grace; Duncan, Neil; Kamminga, Pepijn; Chua, Marcus A. H.; Yao, Lu; Matauschek, Christian; Meyer, Dirk; Liu, Zhi-Jin; Li, Ming; Nadler, Tilo; Fan, Peng-Fei; Quyet, Le Khac; Hofreiter, Michael; Zinner, Dietmar & Momberg, Frank

Abstract

Trachypithecus, which currently contains 20 species divided into four groups, is the most speciose and geographically dispersed genus among Asian colobines. Despite several morphological and molecular studies, however, its evolutionary history and phylogeography remain poorly understood. Phayre’s langur (Trachypithecus phayrei) is one of the most widespread members of the genus, but details on its actual distribution and intraspecific taxonomy are limited and controversial. Thus, to elucidate the evolutionary history of Trachypithecus and to clarify the intraspecific taxonomy and distribution of T. phayrei, we sequenced 41 mitochondrial genomes from georeferenced fecal samples and museum specimens, including two holotypes. Phylogenetic analyses revealed a robustly supported phylogeny of Trachypithecus, suggesting that the T. pileatus check for this species in other resources group branched first, followed by the T. francoisi group check for this species in other resources , and the T. cristatus check for this species in other resources and T. obscurus check for this species in other resources groups most recently. The four species groups diverged from each other 4.5–3.1 million years ago (Ma), while speciation events within these groups occurred much more recently (1.6–0.3 Ma). Within T. phayrei, we found three clades that diverged 1.0–0.9 Ma, indicating the existence of three rather than two taxa. Following the phylogenetic species concept and based on genetic, morphological, and ecological differences, we elevate the T. phayrei subspecies to species level, describe a new species from central Myanmar, and refine the distribution of the three taxa. Overall, our study highlights the importance of museum specimens and provides new insights not only into the evolutionary history of T. phayrei but the entire Trachypithecus genus as well.

Keywords
Colobinae; Integrative zoology; Mitochondrial genome; Museum specimens; New species

 
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