Sinocyclocheilus xingrenensis (Cypriniformes, Cyprinidae), a new underground fish from Guizhou Province, Southeastern China

Zoosystematics and Evolution, Journal Year: 2025, Volume and Issue: 101(2), P. 419 - 436

Published: Feb. 24, 2025

This study describes a new species, Sinocyclocheilus xingrenensis sp. nov. , collected from cave near Xingren City, Guizhou Province, China. Morphologically, the species can be distinguished 80 currently assigned to genus by combination of following characteristics: absence horn-like structures and indistinct elevation at head-dorsal junction; body scaleless, with irregular black markings scattered above lateral line; tip pectoral fin not reaching pelvic origin; anus; line complete curved, pores 65–77; maxillary barbel anterior margin operculum; six rakers on first gill arch. Phylogenetic trees constructed based mitochondrial genes indicate that represents an independent evolutionary lineage relatively large genetic differences 2.8–9.0% for Cyt b 2.7–8.5% ND4.

Language: Английский

Genetic Structure of the Cave-Dwelling Catfish Pterocryptis anomala (Siluriformes: Siluridae) in Southwest China

Animals, Journal Year: 2025, Volume and Issue: 15(9), P. 1202 - 1202

Published: April 23, 2025

The mountainous regions of Southwest China are biodiversity hotspots where geographical isolation promotes genetic differentiation and species diversification. For cave-dwelling like the Pterocryptis anomala, how isolation, historical climate, riverscapes have influenced their evolution remains largely unexplored. Based on 255 samples from Pearl River Yangtze River, this study integrated two mitochondrial genes nuclear to analyze diversity structure P. anomala population. Phylogenetic trees based DNA revealed distinct clades while loci showed no clear separation. Spatial Analysis Molecular Variance (SAMOVA) confirmed groups: Clade I (the Yangtze, Guijiang, Duliujiang Rivers) II Nanpanjiang, Hongshui, Dahuanjiang, Youjiang, Rongjiang Rivers). divergence time between was estimated at 13.73 million years ago, which potentially linked impact QTP uplift monsoonal systems. star-like network analysis neutrality test results indicated that population has maintained a stable state over long period, trend expansion. Additionally, features such as Nanling Mountains major river systems may obstructed gene flow, leading differentiation. These findings improved our understanding species’ evolutionary history structure, offering valuable insights for conservation efforts.

Language: Английский

Four new hypogean species of the genus Triplophysa (Osteichthyes, Cypriniformes, Nemacheilidae) from Guizhou Province, Southwest China, based on molecular and morphological data

ZooKeys, Journal Year: 2023, Volume and Issue: 1185, P. 43 - 81

Published: Nov. 28, 2023

Recently described cave species of the genus Triplophysa have been discovered in southwestern China, suggesting that diversity is severely underestimated and there may be many undescribed species. In this work, four new are from Guizhou Province, namely cehengensis Luo, Mao, Zhao, Xiao & Zhou, sp. nov. rongduensis Yu, Rongdu Town, Ceheng County, Guizhou, panzhouensis Lan, Hongguo Panzhou City, anlongensis Song, Xinglong Anlong Guizhou. These can distinguished all recognized congeners by a combination morphological characteristics significant genetic divergences. The discovery these increases number known within to 39, making second most diverse group fishes China after golden-line fish Sinocyclocheilus . Based on non-monophyletic relationships different watershed systems phylogenetic tree, study also discusses use determine possible historical connectivity river systems.

Language: Английский