Journal Article

A new cave-dwelling blind loach, Triplophysa erythraea sp. nov. (Cypriniformes: Nemacheilidae), from Hunan Province, China.

Huang, T.F., Zhang, P.L., Huang, X.L., Wu, T., Gong, X.Y., Zhang, Y.X., Peng, Q.Z. and Liu, Z.X.

Record Number:
4344
Year:
2019
Journal:
Zoological Research
Pages:
331-336
Volume:
40
Abstract:
A new blind loach species, Triplophysa erythraea sp. nov., from a karst cave in Hunan Province, central south China, is described based on morphology and cyt b gene sequencing. It can be distinguished from other species of Triplophysa by the following combination of characters: eyes absent; body scaleless and colorless; caudal-fin 17; maxillary barbel longest; fins transparent, compressed pectoral-fin reaching 2/ 3 distance between pectoral-fin and pelvic-fin origins; pelvicfin and dorsal-fin origins relative; posterior chamber of airbladder well developed, long, oval, and dissociative. Blindfish possess distinctly degenerated or completely lost eyes due to their cave or subterranean water system or deep ocean habitats (Zhao & Zhang, 2009). These specialized fish species are found within Cypriniformes, mostly belonging to Sinocyclocheilus or Triplophysa, and inhabit various inland river systems in China (Zhang & Dai, 2010). The genus Triplophysa (Nemacheilidae, Cypriniformes) is comprised of small fish living in streams and primarily distributed in the Tibetan Plateau and adjacent areas (He et al., 2011; Jacobsen et al., 2017; Xiao & Dai, 2011). A total of 202 species have been reported within the genus (Eschmeyer et al., 2018), including a number of cave-dwelling species (or populations) specialized for living in underground environments (Lan et al., 2013; Li et al., 2008; Yan, 2017). So far, a total of 30 cave-dwelling species of Triplophysa are known to occur in China (Li et al., 2017, 2018; Wu et al., 2018; Yan, 2017), of which 27 species have been identified from Yunnan, Guizhou, and Guangxi, and two from Chongqing (T. rosa) and Hunan (T. xiangxiensis) (Lan et al., 2013; Li et al., 2017; Wu et al., 2018; Yan, 2017; Zhang & Zhao, 2016
Times Cited:
1
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