Chasmogenus

Chasmogenus er en slekt av biller som hører til familien vannkjær (Hydrophilidae).

Utseende 
Små til middelsstore, ovale, blankt svarte vannkjær. Palpene er lange og tynne, mye lengre enn de spinkle antennene med en løs, tre-leddet klubbe.

Levevis 
Chasmogenus-artene lever i vegetasjonsrike ferskvann.

Systematisk inndeling 

Artslisten følger  og 

 Ordenen biller, Coleoptera
 Underordenen Polyphaga
 Overfamilien vannkjær, Hydrophiloidea
 Familien vannkjær, Hydrophilidae
 Underfamilien Acidocerinae Zaitzev, 1908
 Slekten Chasmogenus Sharp, 1882
 Underslekten Crephelochares Kuwert, 1890
 Chasmogenus (Crephelochares) abnormalis (Sharp, 1890)
 Chasmogenus (Crephelochares) africanus (d'Orchymont, 1937)
 Chasmogenus (Crephelochares) irianus Hebauer, 2001
 Chasmogenus (Crephelochares) livornicus (Kuwert, 1890) - eneste art i Europa
 Chasmogenus (Crephelochares) luctuosus (d'Orchymont, 1939)
 Chasmogenus (Crephelochares) lycetus (d'Orchymont, 1939)
 Chasmogenus (Crephelochares) mauritiensis (Balfour-Browne, 1958)
 Chasmogenus (Crephelochares) molinai Hebauer, 1992
 Chasmogenus (Crephelochares) mollis (Régimbart, 1903)
 Chasmogenus (Crephelochares) molluscus Hebauer, 1992
 Chasmogenus (Crephelochares) nitescens (Fauvel, 1883)
 Chasmogenus (Crephelochares) omissus Hebauer, 1995
 Chasmogenus (Crephelochares) orbus (Watanabe, 1987)
 Chasmogenus (Crephelochares) paramollis Hebauer, 1992
 Chasmogenus (Crephelochares) patrizii (Balfour-Browne, 1957) 
 Chasmogenus (Crephelochares) ruandanus (Balfour-Browne, 1957)
 Chasmogenus (Crephelochares) rubellus Hebauer, 1992
 Chasmogenus (Crephelochares) rubricollis (Régimbart, 1903)
 Chasmogenus (Crephelochares) rudis Hebauer, 1992
 Chasmogenus (Crephelochares) rusticus (d'Orchymont, 1939)
 Chasmogenus (Crephelochares) rutiloides (d'Orchymont, 1939)
 Chasmogenus (Crephelochares) rutilus (d'Orchymont, 1925)
 Chasmogenus (Crephelochares) szeli Hebauer, 1992
 Underslekten Chasmogenus (i snever forstand)
 Chasmogenus (Chasmogenus) australis García, 2000
 Chasmogenus (Chasmogenus) balkei Short, 2010
 Chasmogenus (Chasmogenus) bariorum García, 2000
 Chasmogenus (Chasmogenus) barrae Short, 2005
 Chasmogenus (Chasmogenus) cattienus Hebauer, 2002
 Chasmogenus (Chasmogenus) fluminensis Clarkson & Rivera, 2014 
 Chasmogenus (Chasmogenus) fragilis Sharp, 1882
 Chasmogenus (Chasmogenus) itatiaia Clarkson & Rivera, 2014
 Chasmogenus (Chasmogenus) lilianae Clarkson & Rivera, 2014
 Chasmogenus (Chasmogenus) lorenzo  Short, 2005
 Chasmogenus (Chasmogenus) occidentalis García, 2000
 Chasmogenus (Chasmogenus) punctulatus  Short, 2010
 Chasmogenus (Chasmogenus) rufinasus (Knisch, 1924)
 Chasmogenus (Chasmogenus) ruidus Short, 2005
 Chasmogenus (Chasmogenus) sapucay Fernandez, 1986
 Chasmogenus (Chasmogenus) schoedli Short, 2005
 Chasmogenus (Chasmogenus) ubatuba Clarkson & Rivera, 2014
 Chasmogenus (Chasmogenus) yukparum García, 2000

Referanser

Kilder 
 Hansen, M. 1987. The Hydrophiloidea (Coleoptera) of Fennoscandia and Denmark. Fauna Entomologica Scandinavica 18. E.J. Brill/Scandinavian Science Press Ltd.
 Bilde av Chasmogenus abnormalis

Eksterne lenker 
 

Vannkjær
Dyr formelt beskrevet av David Sharp