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| 墨脱棱鼻树蛙 | Nasutixalus medogensis
Jiang, Yan, Wang & Che, 2016
photo: Ke JIANG [蒋珂] || DOI: 10.13918/j.issn.2095-8137.2016.1.15
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Abstract
A new genus and species of threefrog is described from Medog, southeastern Tibet, China based on morphological and phylogenetic data. The new genus can be distinguished from other treefrog genera by the following combination of characters: (1) body size moderate, 45.0 mm in male; (2) snout rounded; (3) canthus rostralis obtuse and raised prominently, forming a ridge from nostril to anterior corner of eyes; (4) web rudimentary on fingers; (5) web moderately developed on toes; (6) phalange "Y" shaped, visible from dorsal side of fingers and toes; (7) skin of dorsal surfaces relatively smooth, scatted with small tubercles; (8) iris with a pale yellow, "X" shaped pattern of pigmentation.
Key words: Taxonomy, New genus, New species, Theloderma moloch, Nasutixalus medogensis sp. nov.
Phylogenetic analysis: Currently recognized genera of the family Rhacophoridae were recovered as monophyletic groups in our phylogenetic analysis (Figure 1). However, similar to previous studies (Li et al., 2009), our data cannot resolve phylogenetic relationships among different genera. The Medog treefrog was clustered and share the haplotype with a formerly identified T. moloch (specimen voucher number 6255 RAO) in Li et al. (2009), and both of them form a distinct clade from all other species of genus Theloderma, including the true T. moloch. Such result is similar to the phylogenetic topography recovered in Li et al. (2013) using more datasets. Therefore, according to a combination of morphological characters and phylogenetic data of mitochondrial genes, we conclude that the male treefrog specimen (KIZ016395) consisted an independent evolutionary lineage and concordant evidence confirm species status (Hou et al., 2014; Wu & Murphy, 2015), which is described as a new species and a new genus in family Rhacophoridae.
Nasutixalus gen. nov. Jiang, Yan, Wang and Che
Type species: Nasutixalus medogensis sp. nov.
Diagnosis: (1) Body size moderate (45.0 mm in male); (2) snout rounded; (3) canthus rostralis obtuse and raised prominently, forming a ridge from nostril to anterior corner of eyes; (4) web rudimentary on fingers; (5) web moderately developed on toes; (6) phalange “Y” shaped, visible from dorsal side of fingers and toes; (7) skin of dorsal surfaces relatively smooth, scatted with small tubercles; (8) iris with a pale yellow, “X” shaped pattern of pigmentation, especially distinct in preservative.
Distribution: Currently known only from the type locality, Medog, Tibet, China.
Etymology: The generic nomen Nasutixalus is derived from the Latin adjective nasutus (“large-nosed” in English), means the prominent ridge from nostril to the anterior corner of eye, and ixalus, a common generic root for treefrogs. We suggest the common name of the new genus be “ridged-nose treefrog” in English, and “Leng Bi Shu Wa” (棱鼻树蛙) in Chinese.
Content: The new genus currently contains a single species, Nasutixalus medogensis sp. nov. which is described below.
Nasutixalus medogensis sp. nov. Jiang, Wang, Yan and Che (Figures 2-4)
Synonyms: Thermoderma moloch: Li et al., 2009
Holotype: KIZ 016395, adult male, collected from Gelin (N29.21665°, E95.17571°, elevation 1 619 m), Beibeng, Medog, southeastern Tibet, China, on 28 April 2015, by Ke JIANG.
Etymology The species name “medogensis” is named after the type locality, Medog, Tibet, China. According to the Latin name, we suggest the English common name as “Medog Ridged-nose Treefrog”, and the Chinese formal name as “Muo Tuo Leng Bi Shu Wa” (墨脱棱鼻树蛙).
Ke JIANG, Fang YAN, Kai WANG, Da-Hu ZOU, Cheng LI and Jing CHE. 2016. A New Genus and Species of Treefrog from Medog, southeastern Tibet, China (Anura, Rhacophoridae).
ZOOLOGICAL RESEARCH. 37(1); 15-20. DOI: 10.13918/j.issn.2095-8137.2016.1.15
ZOOLOGICAL RESEARCH. 37(1); 15-20. DOI: 10.13918/j.issn.2095-8137.2016.1.15
藏东南发现树蛙科新属新种
就在今年，包括笔者在内的几位研究人员一道，在西藏东南部墨脱热带雨林中发现一类全新的树蛙物种！通过DNA和形态比较，我们中国的两栖爬行动物学者确定这不仅仅是一个新物种，它更代表一个从未被描述过的新属！
