Genus Beguina P. F. Roding, 1798

(3-4-4-0-5-1-3-3-0-0-0-0-0)
Ref. Abbott & Dance, 1982 p 324
Lindner, 1977 p 108
Vokes, 1980 p 117
Syn. Azarella J. E. Gray, 1854
Ref. Vaught, 1989 p 128

semiorbiculata (C. v. Linne, 1758)
(3-4-4-0-5-1-3-3-0-1-0-0-0)
Half-round Cardita
Ref. Abbott & Dance, 1982 p 324 c