Subgenus (Eontia) F. S. MacNeil, 1938
(3-7-3-0-1-1-4-1-1-0-0-0-0) Ref. Abbott, 1974 p 425 ponderosa (T. Say, 1822) [T] (3-7-3-0-1-1-4-1-1-1-0-0-0) Ponderous Ark Ref. Abbott, 1974 p 425 bw Abbott & Dance, 1984 p 293 c Amer. Fish. Soc., 1988 p 24
(3-7-3-0-1-1-4-1-1-0-0-0-0) Ref. Abbott, 1974 p 425
ponderosa (T. Say, 1822) [T] (3-7-3-0-1-1-4-1-1-1-0-0-0) Ponderous Ark Ref. Abbott, 1974 p 425 bw Abbott & Dance, 1984 p 293 c Amer. Fish. Soc., 1988 p 24