Liobagrus chengduensis, a new species of torrent catfish (Teleostei: Siluriformes: Amblycipitidae) from the upper Changjiang River basin in southwest China

• Published in: Dōngwùxué yánjiū 2022-07, Vol.43 (4), p.679-682
• Main Authors: Chen, Zhong-Guang, Guo, Yan-Shu, Wu, Jia-Yun, Wen, An-Xiang
• Format: Article
• Language: English
• Subjects: Anus; Catfish; DNA; Endemic species; Ethanol; Fins; Fish; Hydrobiology; Insertion; Jaw; Liobagrus; Mandible; Maxilla; Museums; New species; Nucleotide sequence; PCR; Phylogenetics; Polymerase chain reaction; Primers; River basins; Rivers; Thermal cycling; Vertebrae; Zoology
• ISSN: 0254-5853
• DOI: 10.24272/j.issn.2095-8137.2022.114

The region belongs to the upper Changjiang River basin and has a unique fish composition with many endemic species. Polymerase chain reaction (PCR) amplifications of cyt b were performed in a final 23 gL volume mixture containing 1 gL of template DNA, 1 gL of each pair of primers, and 20 gL of 1·T3 Super PCR Mix (Tsingke, China). College of Life Sciences, Sichuan Agricultural University, Ya'an, China (SAULS); Natural History Museum, London, UK (BMNH); Institute of Zoology, Chinese Academy of Sciences, Beijing, China (ASIZB); Chonbuk National University, Jeonju, South Korea (CNUC); Field Museum of Natural History, Chicago, USA (FMNH); Sichuan Academy of Forestry Sciences, Chengdu, China (SAFS); Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China (IHB). While Liobagrus chengduensis sp. nov., L. marginatus, L. nigricauda, L. kingi, L. chenghaiensis, L. huaiheensis, L. pseudostyani, L. andersoni, L. mediadiposalis, L. obesus, L. somjinensis, and L. hyeongsanensis are defined by pectoralfin spine with serrated posterior edge, the new species can be distinguished from all other species in this group by the following characteristics: upper jaw obviously shorter than lower jaw (vs. longer in L. mediadiposalis, L. somjinensis, L. hyeongsanensis, L. huaiheensis, and L. pseudostyani), analfin rays 15-16 (vs. 11-14 in L. marginatus, 9-12 in L. kingi, 10-12 in L. chenghaiensis, and 13-14 in L. mediadiposalis), post-Weberian vertebrae 36-37 (vs. more than 37 in L. andersoni, L. mediadiposalis, L. obesus, L. somjinensis, and L. hyeongsanensis), caudal fin rounded (vs. subtruncate in L. marginatus, L. chenghaiensis, L. andersoni, L. mediadiposalis, and L. somjinensis), anus closer to pelvic-fin insertion than to anal-fin origin (vs. closer to anal-fin origin than to pelvic-fin insertion in L. kingi, L. andersoni, and L. obesus), marked incision present at confluence between adipose and caudal fin (vs. incision absent in L. nigricauda, L. hyeongsanensis, and L. pseudostyani), posterior margin of pectoral-fin spine not reaching dorsal-fin base (vs. reaching dorsal-fin base in L. marginatus, L. nigricauda, L. kingi, L. chenghaiensis, L. huaiheensis, L. andersoni, L. mediadiposalis, L. obesus, and L. somjinensis) (Supplementary Table S3).