A preliminary review of Isonychia Eaton, 1871 from Chinese mainland with a re-description of I. kiangsinensis Hsu, 1936 (Insecta, Ephemeroptera, Isonychiidae)

By

Qiang, Xinhe
Zhou, Changfa

Type

Article

Date of Publication

2023

Original Publication

ZooKeys

Volume

1178

Pages

115--141

Subjects

Biogeography , mayfly , Morphology , Species diversity , taxonomy

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1178.104619

 

Abstract

Previously, seven species of the genus Isonychia Eaton, 1871 were reported in China, but they have never been systematically reviewed. After examining our collections from the Chinese mainland, six species and one additional subspecies have been recognized, compared, and photographed. Among them, I. kiangsinensis is redescribed in all stages and a neotype is designated. Its males have triangular penes and nymphs have three dark pigments on each gill. A synonym of I. guixiensisWu et al., 1992 (I. sinensisWu et al., 1992) is confirmed. The males of this species have nearly cylindrical penes and clear abdominal markings. Finally, two species and one subspecies are recorded for the first time in China: I. ussurica sibiricaTiunova et al., 2004, I. ussurica ussurica Bajkova, 1970 and I. vshivkovae vshivkovaeTiunova et al., 2004. Together with the I. ignota (Walker, 1853), I. sexpetalaTiunova et al., 2004, I. formosana (Ulmer, 1912) and possible I. japonica (Ulmer, 1920), they show the rich diversity of the genus Isonychia in China.