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FIONOIDEA Gray, J.E., 1857

FIONIDAE Alder, J. & A. Hancock, 1855 Type Genus : Fiona Alder, J. & A. Hancock in Forbes, E. & S. Hanley, 1851 ThumbNails
CALMIDAE Iredale, T. & C.H. O'Donoghue, 1923 Type Genus : Calma Alder, J. & A. Hancock, 1855 ThumbNails
CUTHONIDAE Odhner, N.H.J., 1968 ThumbNails
EUBRANCHIDAE Odhner, N.H.J., 1934 Type Genus : Eubranchus Forbes, E., 1834 ThumbNails
TERGIPEDIDAE Bergh, L.S.R., 1889 Type Genus : Tergipes Cuvier, G.L.C.F.D., 1805 ThumbNails