First record of Bibrax Fletcher, 1927 (Coleoptera, Staphylinidae, Pselaphinae) from Ecuador, with descriptions of twelve new species

By

Tapuy-Avilés, Yarina
Díaz-Guevara, David R.
Caterino, Michael S. (Michael Stephen), 1969-

Type

Article

Date of Publication

2025-8-26

Original Publication

ZooKeys

Volume

1250

Pages

105--133

Subjects

Leaf litter beetles , microphthalmy , tropical biodiversity

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers

Identifiers

DOI: https://doi.org/10.3897/zookeys.1250.156763

 

Abstract

Twelve new species of Bibrax Fletcher, 1927 (Coleoptera: Staphylinidae: Pselaphinae: Euplectitae: Metopiasini) from Ecuador are described: B. chullachaquisp. nov., B. chocoensissp. nov., B. onoreisp. nov., B. aratrifersp. nov., B. longiventersp. nov., B. cerroblancosp. nov., B. canelazosp. nov., B. pectinifersp. nov., B. arachnoidessp. nov., B. amasangasp. nov., B. yasunisp. nov., and B. grandissp. nov. A key for all species of Bibrax is provided. These are the first records of the genus for the country, and we report species from most major environments in the country, from seasonal coastal forests to cloud forests and the Amazonian Basin. The new species expand the scope of morphological variability in the genus, with discovery of numerous microphthalmous and wingless species, and a range of previously unreported secondary sexual characters. Most of the species are only known from single localities, suggesting a large fauna remaining to be discovered from a large portion of South America.