Prothalassoceras bashkiricum
Prothalassoceras biforme
Prothalassoceras notabile
Prothalassoceras kingorum
Prothalassoceras bogoslovskayae
Prothalassoceras bostocki
Prothalassoceras caddoense
Prothalassoceras serratum
Prothalassoceras welleri
Prothalassoceras inexpectans
Prothalassoceras inflatum
Prothalassoceras solitum
Prothalassoceras sangvorense
Prothalassoceras jaikense