1961  Protosageceras Popov: 10.
     1962  Protosageceras.-Osnovy: 356.
     1996  Episageceras.-Dagys & Ermakova: 403.

Type species: Protosageceras antiquum Popov,1961, p.10 [OD].

Like Episageceras, but with crenulated ventral shoulders (teste Dagys & Ermakova, 1996, p.403).