Genus Megalonaias Utterback, 1915

(3-5-4-0-4-9-0-5-0-0-0-0-0)
Ref. Amer. Fish. Soc., 1988 p 31
[see under Subfamily: AMBLEMINAE; Tribe: Amblemini]

boykiniana (I. Lea, 1840)
(3-5-4-0-4-9-0-5-0-1-0-0-0)
Round Washboard
Ref. Amer. Fish. Soc., 1988 p 31

nervosa (C. S. Rafinesque, 1820)
(3-5-4-0-4-9-0-5-0-2-0-0-0)
Washboard
Ref. Amer. Fish. Soc., 1988 p 31