Revision of the genus Exalloniscus Stebbing, 1911 (Crustacea, Isopoda, Oniscidea)

The present taxonomic revision recognizes 16 species of Exalloniscus. Seven spacies, namely E. maschwitzi, E. caudatus, E. malaccensis, E. bicoloratus from West Malaysia, E. borneanus from East Malaysia, E. beroni from northern Thailand and E. vietnamensis from Vietnam, are described as new. Lectotypes of E. coecus (Dollfus, 1898) and E. albus (Dollfus, 1898) are designated. Diagnostic characters of all the species are illustrated. A map and comments on the distribution and biology of the 16 species are included.