Description of the larva of Cybister (Melanectes) brevis Aubé, 1838 (Coleoptera, Dytiscidae, Cybistrinae)

By

Watanabe, Kohei
Hayashi, Masakazu

Type

Article

Date of Publication

2025-10-29

Original Publication

ZooKeys

Volume

1257

Pages

137--151

Subjects

chaetotaxy , diving beetle , larval stage , red list , water beetle

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1257.168982

 

Abstract

<br> Cybister (Melanectes) brevis Aubé, 1838 is an endangered species in Japan. Here, we present the first description of C. (M.) brevis larvae, emphasizing the chaetotaxy of the cephalic capsule, head appendages, legs, last abdominal segment, and urogomphi. Morphological differences between the subgenera<br> Cybister<br> Curtis, 1827 and<br> Melanectes<br> Brinck, 1945 include (1) the width of notches between medial and lateral projections of frontoclypeus, (2) the shape of egg bursters, and (3) the appearance of the clypeal lamellae.<br>