1900  Thalassoceratidae Hyatt in Zittel-Eastman,p.553.
     1944  Thalassoceratidae.-Miller in King et al.: 93.
     1950  Thalassoceratidae.-Ruzhentsev,p.103.
     1952  Thalassoceratidae.-Ruzhentsev: 58.
     1957  Thalassoceratidae.-Treatise,p.L68.
     1960  Thalassoceratidae.-Ruzhentsev,p.205.
     1962  Thalassoceratidae.-Osnovy,p.370.
     1999  Thalassoceratidae.-Leonova: 36.

Thalassocerataceae:

A:    Conch form thick-discoidal to subglobular, involute. Umbilicus narrow or closed. B: Growth striae biconvex,
       with ventral sinus.
G:    Ventral lobe extremely wide; height of median saddle may extend considerably half the height of the entire
        ventral lobe. Lobes simple (Bisatoceratidae) or serrate and digitate (Thalassoceratidae).

Thalassoceratidae:

E:    Some forms with ventrolateral grooves. F: No spiral ornamentation. Umbilical callus may be present.
G:    Lobes asymmetrical serrate to digitate, with tendency toward increased degree of digitation; saddles
        rounded.

Fig. TAX5215 A: Eothalassoceras, B: Aristoceras, C: Prothalassoceras, D: Thalassoceras, E: Epithalassoceras
(sutures).

Fig. TAX5215A: A: Eothalassoceras inexpectans, B: Aristoceras chkalovi, C: Prothalassoceras jaikense,
D: Thalassoceras phillipsi (cross-sections).