A new species of Opsariichthys (Teleostei, Cypriniformes, Xenocyprididae) from Southeast China

By

Peng, Xin
Zhou, Jia-Jun
Gao, Hong-Di
Yang, Jin-Quan

Type

Article

Date of Publication

2024

Original Publication

ZooKeys

Volume

1214

Pages

15--34

Subjects

cytochrome b , Morphology , opsariichthine , phylogenetic analysis , Principal Component Analysis (PCA) , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1214.127532

 

Abstract

Opsariichthys iridescenssp. nov. is described from the Qiantang and Oujiang rivers in Zhejiang Province and a tributary of the Yangtze River adjacent to the Qiantang River. It is distinguished from congeners by the following combination of morphological features: no obvious anterior notch on the tip of the upper lip; 45–52 lateral-line scales; 18–21 pre-dorsal scales; two rows of pharyngeal teeth; a maxillary extending to or slightly beyond the vertical anterior margin of the orbit in adult males; a pectoral fin extending to the pelvic fin in adult males; nuptial tubercles on the cheeks and lower jaw of males, which are usually united basally to form a plate; uniform narrow pale pink cross-bars on trunk and two widening significantly on caudal peduncle. Its validity was also supported by its distinct Cyt b gene sequence divergence from all congeners and its monophyly recovered in a Cyt b gene-based phylogenetic analysis.