Order: Pterioida N. D. Newell, 1965

(3-7-8-0-0-0-0-0-0-0-0-0-0)
Ref. Abbott, 1974 p 440
Bernard, 1983 p 21
Lindner, 1977 p 101
Vaught, 1989 p xi,117
Vokes, 1980 p 30
Wagner, 1984 p 54
Syn. Pteroconchida Ref. Keen, 1971 p 75