Vanmanenia marmorata, a new species of loach (Teleostei: Gastromyzontidae) from the middle Chang-Jiang Basin in Guizhou Province, south China
Citation
Deng S (2021). Vanmanenia marmorata, a new species of loach (Teleostei: Gastromyzontidae) from the middle Chang-Jiang Basin in Guizhou Province, south China. Biodiversity Data Journal. Checklist dataset https://doi.org/10.3897/bdj.9.e72432 accessed via GBIF.org on 2024-12-13.Description
The gastromyzontid genus Vanmanenia was established by Hora in 1932, based on the type species Vanmanenia stenosoma. The genus is a loach group adapted to running waters of streams from southern China, northern Vietnam and Laos. Currently, 19 valid species of the genus have been recognised. The northernmost distribution of the genus is the Yangtze River (= Chang-Jiang in Chinese) Basin and five species (V. maculata, V. intermedia, V. stenosoma, V. pseudostriata and V. gymnetrus) have been reported from the Basin.Vanmanenia marmorata, a new hillstream species of loach, is here described from the middle Chang-Jiang Basin in Guizhou Province, south China. It is distinguished from its congeners by having a combination of the following characters: three triangular-shaped rostral lobules; postdorsal saddles wider than interspaces; a more backwards-placed anus (the vent to anal distance 30.5–36.9% of the pelvic to anal distance); a larger gill opening with its upper extremity reaching the level of the middle of the orbit; anal-fin base length 5.6–6.4% of SL; caudal-peduncle length 11.6–12.9% of SL; prepelvic length 51.1–53.4% of SL. Its validity is also affirmed by its distinct cyt b gene sequence divergence with all sampled congeners and its monophyly recovered in a cyt b gene-based phylogenetic analysis.Taxonomic Coverages
Geographic Coverages
Bibliographic Citations
Contacts
Shuqing Dengoriginator
position: Dr
Institute of Hydrobiology, Chinese Academy of Sciences
Wuhan
CN
email: shuqingdeng@ihb.ac.cn
Shuqing Deng
metadata author
position: Dr
Institute of Hydrobiology, Chinese Academy of Sciences
Wuhan
CN
email: shuqingdeng@ihb.ac.cn
Shuqing Deng
administrative point of contact
position: Dr
Institute of Hydrobiology, Chinese Academy of Sciences
Wuhan
CN
email: shuqingdeng@ihb.ac.cn