Rodzaj Paralytoceras Frech, 1902
Gatunek typowy Opis Conch form discoidal, evolute, with moderately wide umbilicus. Venter at later stages broadly rounded or oxycone and always with separate keel. Growth striae lamellate or sometimes crenulate; simple riblets present. Ventral lobe wide, ventrolateral saddle rounded, adventitious lobe deep. Synonimy Zasięg czasowy Literatura |
|