A new species of Cycreon d’Orchymont, 1919 from Singapore (Coleoptera: Hydrophilidae: Megasternini)

Abstract

The monotypic genus Cycreon Orchymont, 1919 was established for the species Cycreon sculpturatus Orchymont, 1919, based on a single female specimen from Palembang, Sumatra (Orchymont 1919). At some later point, d’Orchymont studied a specimen from Singapore and labelled it with a note indicating it may be either a male of C. sculpturatus or a new species (Fig. 27). Examination of the holotype of C. sculpturatus revealed the Singapore specimen does indeed represent a new species. It was additionally labeled by d’Orchymont: “Cycreon emarginatus n. sp. voir cependantsi ce n’esl pas le ♂ de sculpturatus” [Cycreon emarginatus n. sp. however, whether is it not the male of C. sculpturatus] but it has never been described.

A review of Himalcercyon stat. nov., with description of a new species from the Chinese Himalaya and an updated key to Asian genera of Megasternini (Coleoptera, Hydrophilidae)

“…Megasternini is the largest clade of terrestrial water scavenger beetles, containing approximately 580 described species currently classified in 52 genera (Jia et al 2011(Jia et al , 2019Ryndevich 2011;Short and Fikáček 2011;Fikáček et al 2012aFikáček et al , 2015bFikáček and Rocchi 2013;Makhan 2013;Deler-Hernández et al 2014;Arriaga-Varela et al 2017, 2018aRyndevich and Prokin 2017;Shatrovskiy 2017;Szczepański et al 2018). Since the 1980s, 20 new genera of Megasternini have been described from the Afrotropical, Australian, Oriental, and Neotropical regions by Hansen (1989Hansen ( , 1990Hansen ( , 1999a, Hebauer (2002aHebauer ( , 2003, Arriaga-Varela et al (2018a).…”