Taxonomic revision of the cavefish genus Karstsinnectes (Cypriniformes, Nemacheilidae), with a description of a new species from Guangxi Province, China Author Ge, Jia-Yue Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, Guangxi 541004, China Author Nong, Zheng-Quan Guangxi Key Laboratory of Rare and Endangered Animal Ecology, College of Life Science, Guangxi Normal University, Guilin, Guangxi 541004, China Author Yang, Jian Administration Center of Guangxi Nonggang National Nature Reserve, Longzhou Guangxi 532400, China Author Du, Li-Na 0000-0002-2246-643X Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection (Guangxi Normal University), Ministry of Education, Guilin, Guangxi 541004, China Author Zhou, Jia-Jun 0000-0003-1038-1540 Key Laboratory of Environment Change and Resource Use, Beibu Gulf, Nanning Normal University, Nanning, Guangxi, 530001, China & Zhejiang Forest Resource Monitoring Center, Hangzhou, Zhejiang 310020, China text Zoosystematics and Evolution 2024 2024-05-27 100 2 663 673 journal article 10.3897/zse.100.118061 0440F4DE-BECE-4B8B-9D84-88E17489226C Genus Karstsinnectes Zhou, Luo, Wang, Zhou & Xiao, 2023 Karstsinnectes Zhou, Luo, Wang, Zhou & Xiao, 2023 , 696 original descriptions. Type species. Oreonectes anophthalmus Zheng, 1981 . Diagnosis. Base of anterior nostril tube-like and tip not elongated to barbel-like; anterior and posterior nostrils adjacent; lips with furrows; caudal peduncle with adipose crests; bony capsule of swim bladder opens posteriorly. Remarks. In the family Nemacheilidae , the genera Eonemachilus Berg, 1938 ; Karstsinnectes ; Micronemacheilus Rendahl, 1944 ; Protonemacheilus Yang & Chu, 1990 ; Traccatichthys Freyhof & Serov, 2001 ; and Yunnanilus Nichols, 1925 , are characterized by a tube-like anterior nostril with tip not elongated to barbel-like structure ( Du et al. 2021 , 2023 ). However, Karstsinnectes can be distinguished from Eonemachilus , Protonemacheilus , Traccatichthys , and Yunnanilus by anterior and posterior nostrils adjacent (vs. separated in Eonemachilus and Yunnanilus , closely set in Protonemacheilus and Traccatichthys ) and from Micronemacheilus and Traccatichthys by lips with furrows (vs. with papillae). Species included. Karstsinnectes acridorsalis ( Lan, 2013 ) , K. anophthalmus (Zheng, 1981) , K. hyalinus (Lan, Yang & Chen, 1996) , K. longzhouensis sp. nov. , and K. parvus ( Zhu & Zhu, 2014 ) .