O. Biström & G. Wewalka 1994: Hydrovatus asymmetricus sp. n. (Coleoptera, Dytiscidae) - an Enigmatic Species From Southeast-Asia. - Entomologica Fennica 5: 103-104.
Hydrovatus asymmetricus sp. n. is described from Kamputchea, Burma and Indonesia (Java), and its enigmatic systematic position is discussed.