Order: Nuculoida W. H. Dall, 1889

(3-6-1-0-0-0-0-0-0-0-0-0-0)
Ref. Abbott, 1974 p 409
Amer. Fish. Soc., 1988 p 21
Bernard, 1983 p 9
Keen, 1971 p 24
Lindner, 1977 p 98
Vaught, 1989 p xi,113
Vokes, 1980 p 1
Wagner, 1984 p 45