Cybister dehaanii Aubé, 1838

Hendrich, Lars & Balke, Michael, 2004, Aquatic Coleoptera Of Singapore: Species Richness, Ecology And Conservation #, Raffles Bulletin of Zoology 52 (1), pp. 97-145 : 120

Cybister dehaanii Aubé, 1838

Cybister dehaani Aubé, 1838: 101 ; Sharp, 1882: 726; Régimbart, 1899: 356; Zimmermann, 1920: 259; Guignot, 1956b: 397; Vazirani, 1968: 286; 1977: 88; Hebauer et al., 1999: 339.

Cybister dehaanii Aubé, 1838 : Nilsson, 2001: 91.

Material known. – Number? – “ Singapour ”, in TDMB ( Guignot, 1956b). Not seen.

Distribution. – India: West Bengal ( Vazirani, 1977), Indonesia [Sumatra, Kalimantan] ( Régimbart, 1899), Thailand (in coll. Hendrich), West Malaysia [Pahang: Tasek Cini] ( Hebauer et al., 1999), Singapore ( Guignot, 1956b).

Ecology. – Cybister dehaanii lives in permanent water bodies in freshwater swamps and in shallow lakes. In general the water is shaded and rich in plant debris such as leaf litter and rotten trunks (pers. observ. at Tasek Cini/West Malaysia). There is no such habitat in Singapore. The species is thus considered locally extinct. Cybister dehaanii is less frequently attracted to light than other species of the genus. It is quite rare in museum collections.