Genus Didonta C. F. Schumacher, 1817

(3-4-3-1-2-1-0-33-0-0-0-0-0)
Syn. Diodonta L. Agassiz, 1845
[=Hiatella F. M. Daudin, 1801]
[in L. A. G. Bosc, 1801]
Ref. Vaught, 1989 p 138
Vokes, 1980 p 186

bicarinata C. F. Schumacher, 1817
(3-4-3-1-2-1-0-33-0-1-0-0-0)
[=Hiatella (Hiatella) arctica (C. v Linne, 1767)]
Ref. Bernard, 1979 p 56
Bernard, 1983 p 59
Wagner, 1984 p 72