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| Tylototriton daloushanensis Zhou, Xiao & Luo, in Luo, Yan, Xiao, ... et Zhou, 2022. |
A new newt species, Tylototriton daloushanensis Zhou, Xiao & Luo, sp. nov., is described from Guizhou, China, based on phylogenetic and morphological analyses. Phylogenetic analyses based on mitochondrial 16S and ND2 genes show that the new species is an independent lineage closely related to T. maolanensis, T. broadoridgus, T. dabienicus, T. anhuiensis, and T. wenxianensis. Morphologically, the new species is distinguished from its congeners by a combination of the following morphological characters: (1) large body size (SVL 64.7-83.6 mm in male and 70.5-100.3 mm in female); (2) head longer than wide, prominent bony ridges present; (3) snout rounded in dorsal view; (4) tail length less than snout-vent length in both males and females; (5) dark black body coloration, except for bright orange cranial region, palms and soles, vent region, and ventral ridge of tail; (6) relative length of toes III > IV > II > I > V; (7) fingertips reaching to between the eyes and nostrils when the forelimbs are stretched forward; (8) distal tip of the limbs greatly overlapping when the fore and hind limbs are pressed along the trunk; (9) presence of gular fold; (10) vertebral ridge slightly segmented, slightly flattened rib nodules, indistinct interspaces between rib nodules; and (11) lacking orange color markings on posterior parotoids and rib nodules. The found of the new species suggests that the species diversity of the genus Tylototriton may be underestimated.
Key words: Asian knobby newts, systematics, cryptic species, taxonomy.
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| Tylototriton daloushanensis Zhou, Xiao & Luo, sp. nov. in life. A–C. Male holotype, GZNU20180806001, dorsal, ventral, and dorsolateral views. D–F. Female paratype, GZNU20180607001, dorsal, ventral, and dorsolateral views. H–I. Male holotype, GZNU20180806001, ventral view of the hand, foot, and cloaca. J–L. Female paratype, GZNU20180607001, ventral view of the hand, foot, and cloaca (yellow arrow). All photos were taken at around 9:00 am. |
Tylototriton daloushanensis Zhou, Xiao & Luo, sp. nov
Diagnosis. The new species is assigned to the T. wenxianensis species group of the subgenus Yaotriton based on
phylogenetic analysis and on the following morphological characters: body almost black, except for the orange cranial region,
palms and soles, vent region, and ventral ridge of tail (Yang et al., 2014, Fei & Ye, 2016); head longer than wide; tubercles
on dorsal and ventral surfaces almost equal in size; ventral skin without transverse wrinkles; and indistinct interspaces
between rib nodules
Etymology. The specific epithet, daloushanensis, is in reference to the type locality, Mt. Dalou in Guizhou Province, China. For the common name, we suggest “Mt. Dalou’s Knobby Newt,” and for the Chinese name, “Da Lou Shan You Yuan (大娄山疣螈).”
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| Habitat and eggs of Tylototriton daloushanensis Zhou, Xiao & Luo, sp. nov. at the type locality. A. Microhabitats. B. Individual found in the type locality. C. Eggs laid by GZNU20180607001 on 7 June 2018. D. Individual GZNU20180608001 collected on 8 June 2018 in Kuankuoshui National Nature Reserve. |
Tao Luo, Shasha Yan, Ning Xiao, Wei Li , Huaiqing Deng and Jiang Zhou. 2022. A New Species of the Genus Tylototriton (Amphibia: Urodela: Salamandridae) from the Eastern Dalou Mountains in Guizhou, China. Zoological Systematics. 47(1): 66-88. DOI: 10.11865/zs.2022102
