title: Redescription and lectotype designation of Chasmogenus abnormalis (Sharp), with notes on its distribution.
abstract: Chasmogenus Sharp, 1882 is a relatively small genus of 43 described species of aquatic beetles assigned to the subfamily Acidocerinae of Hydrophilidae (Hansen 1999; Short & Hebauer 2006; Short & Fikáček 2011, 2013; Clarkson & Ferreira-Jr. 2014). It is distributed in all zoogeographic regions except the Nearctic, with the highest species richness known from the Afrotropical (18 spp.) and Neotropical (15 spp.) Regions. Only four species have been described from the Oriental Region: C. abnormalis (Sharp, 1890), C. rubricollis (Régimbart, 1903), C. larsi Hebauer, 1995, and C. cattienus Hebauer, 2002. Of these, only C. abnormalis was recorded multiple times after its description.
authors.affiliation: Laboratory of Entomology, P.G. Department of Zoology, D. M. College of Science, Imphal-795001, Manipur, India; Email: mbhubaneshwari@yahoo.com.
authors.forename: M Bhubaneshwari
authors.initials: MB
authors.lastname: Devi
authors.affiliation: Laboratory of Entomology, P.G. Department of Zoology, D. M. College of Science, Imphal-795001, Manipur, India; Email: unknown.
authors.forename: O Sandhyarani
authors.initials: OS
authors.lastname: Devi
authors.affiliation: National Museum, Department of Entomology, Cirkusova 1740, CZ-19300 Praha 9, Czech Republic Department of Zoology, Faculty of Science, Charles University in Prague, Viničná 7, CZ-12843 Praha 2, Czech Republic; Email: mfikacek@gmail.com.
authors.forename: Martin
authors.initials: M
authors.lastname: Fikáček
authors.affiliation: Natural History Division, Kitakyushu Museum of Natural History and Human History, Higashida 2-4-1, Yahatahigashi-ku, Kitakyushu, Fukuoka, 805-0071 Japan; Email: unknown.
authors.forename: Yûsuke N
authors.initials: YN
authors.lastname: Minoshima
authors.affiliation: Laboratory of Entomology, P.G. Department of Zoology, D. M. College of Science, Imphal-795001, Manipur, India; Email: unknown.
authors.forename: Leiphon
authors.initials: L
authors.lastname: Wanghengbam
mesh_terms: D063147:Animal Distribution / Q000502:physiology; D000818:Animals; D001517:Coleoptera / Q000033:anatomy & histology / Q000145:classification* / Q000502:physiology; D007194:India; D013045:Species Specificity