Review of the flower-inhabiting water scavenger beetle genus Cycreon (Coleoptera, Hydrophilidae), with descriptions of new species and comments on its biology

By

Arriaga-Varela, Emmanuel
Wong, Sin Yeng
Kirejtshuk, Alexander G, 1952-
Fikáček, Martin

Type

Article

Date of Publication

2018

Original Publication

Deutsche entomologische Zeitschrift

Volume

65

Series / Issue

Issue: 1

Pages

99--115

Subjects

Araceae , Borneo , flower visitor , Malay Peninsula , Megasternini , new species , Oriental region , Pollination , Schismatoglottideae , Sphaeridiinae

Contributed by

Pensoft Publishers

Language

English

Published by

Berlin Nicolai'sche Verlags-Buchandlung 1881-

Identifiers

DOI: https://doi.org/10.3897/dez.65.26261

 

Abstract

The hydrophilid genusCycreonOrchymont, 1919, previously known from two historical specimens only, is reviewed based on the numerous material collected recently from the inflorescences of various Araceae species in the Malay Peninsula and Borneo. Four species are recognized in the genus:C.sculpturatusOrchymont, 1919 from Sumatra,C.armandiShatrovskiy, 2017 from Singapore,C.adolescenssp. n.from peninsular Malaysia, andC.floricolasp. n.with two subspecies, the nominotypical one from Peninsular Malaysia, andC.floricolaborneanussubsp. n.from Borneo. All species are very similar, differing only by the pronotal punctation, shape of the clypeus and the mentum, and the form of the median lobe of the aedeagus. Specimens ofC.floricolasp. n.andC.adolescenssp. n.were collected from inflorescences of various genera of the family Araceae. The field observations and analysis of mid gut contents indicates that they feed on organic material on internal organs of the inflorescences, including the pollen of the host plant. They were also observed to carry a large amount of pollen and are likely pollinators of their host species of Araceae.