Subclass: Prosobranchia H. Milne-Edwards, 1848

(5-4-0-0-0-0-0-0-0-0-0-0)
Ref. Abbott, 1989 p 33,208
Lindberg, 1981 p 18
Vaught, 1989 p viii,5
Syn. Prosobranchiata <"gills forward">,
Streptoneura <"twisted nerves">
Ref. Abbott, 1974 p 15
Keen, 1971 p 307
[=Streptoneura]
Ref. Lindner, 1977 p 30