Genus Amygdalum Megerle v. Muhlfeld, 1811

(3-7-5-0-1-2-3-3-0-0-0-0-0)
Ref. Abbott, 1974 p 436
Amer. Fish. Soc., 1988 p 23
Bernard, 1983 p 19
Keen, 1971 p 74
Lindner, 1977 p 101
Syn. Modiella T. A. Monterosato, 1884
Ref. Vaught, 1989 p 116
Syn. Amigdalum Rovereto, 1898
Ref. Vokes, 1980 p 22

americanum Soot-Ryen, 1955
(3-7-5-0-1-2-3-3-0-1-0-0-0)
Ref. Bernard, 1983 p 19
Keen, 1971 p 74 d

dendriticum Megerle v. Muhlfeld, 1811 [T]
(3-7-5-0-1-2-3-3-0-2-0-0-0)
Ref. Abbott, 1974 p 436

pallidulum [pallidulus] (W. H. Dall, 1916)
(3-7-5-0-1-2-3-3-0-3-0-0-0)
Pallid Papermussel
Ref. Abbott, 1974 p 436
Amer. Fish. Soc., 1988 p 23
Keen, 1971 p 74 d
Syn. Modiola polita authors, not A. E. Verrill & K. J. Bush, 1880;
Modiolus (Modiolus) politus pallidulus W. H. Dall, 1916
Ref. Bernard, 1983 p 19

papyrium (T. A. Conrad, 1846)
(3-7-5-0-1-2-3-3-0-4-0-0-0)
Atlantic Papermussel, Paper Mussel
Ref. Amer. Fish. Soc., 1988 p 23
Syn. Modiola pulex H. C. Lea, 1842, not J. B. P. A. de Lamarck, 1819
Ref. Abbott, 1974 p 436 bw

politum (A. E. Verrill & E. A. Smith, 1880)
(3-7-5-0-1-2-3-3-0-5-0-0-0)
Ref. Abbott, 1974 p 436 d

sagittatum H. A. Rehder, 1934
(3-7-5-0-1-2-3-3-0-6-0-0-0)
Arrow Papermussel
Ref. Abbott, 1974 p 436
Amer. Fish. Soc., 1988 p 23