Megasybacodes brevitarsis, a new genus and species of Rhyparini (Coleoptera: Scarabaeidae: Aphodiinae) from Borneo

Abstract

Megasybacodes brevitarsis Kakizoe, Maruyama & Masumoto, a new genus and new species of the tribe Rhyparini, is described based on a single female from Borneo. It is allied to the genus Sybacodes Fairmaire, 1896, but easily distinguished by its short protarsi, broad flattened basal tarsomeres of the meso- and metatarsi, broad flattened tibiae, and wrinkled pronotal and elytral surfaces. Checklist of rhyparine species from Borneo is also provided.

Myrmecophily of the enigmatic stag beetleTorynognathus chrysomelinus(Coleoptera: Lucanidae: Lucaninae) with remarks on adult morphology, immature stages, and systematic position

“…5) may also be related to myrmecophily in T. chrysomelinus. The simplification and miniaturization of mouthparts are typical morphological features in myrmecophilous and termitophilous symbionts (Parker 2016;Kakizoe et al 2019). This morphology suggests that the adults of T. chrysomelinus does not eat anything or is fed with liquid food by Pseudolasius sp., as hypothesized for the obligatory termitophilous tribe Corythoderini (Scarabaeidae: Aphodiinae) (Tangelder & Krikken 1982).…”