Jonas is a genus of crustaceans belonging to the family Corystidae.
The species of this genus are found in Japan, Malesia and Australia.
Species:
Jonas choprai Serène, 1971
Jonas distinctus (De Haan, 1835)
Jonas formosae (Balss, 1922)
Jonas indicus (Chopra, 1935)
Jonas kalpakkamensis Barathkumar, N.P.I.Das & Satpathy, 2016
Jonas leuteanus Ward, 1933
Jonas macrophthalmus Hombron & Jacquinot, 1846