Opis

Conch moderately to completely involute, subdiscoidal with wide to narrow umbilicus; growth lines linear or biconvex, crossed by longitudinal lirae thus forming reticulate ornamentation; nodelike riblets and lateral plications in some forms; ventrolateral furrows may be present; relatively simple and rounded in some forms suture line; usually well developed, but less pouched prongs of ventral lobe ; median saddle usually about half as high as entire ventral lobe, or slightly higher; advanced genera with wider lateral lobe and generally attenuate lobes.

Synonimy

Zasięg czasowy

Carboniferous, Bashkirian-Moscovian.

Literatura

Librovich, L.S. 1957. O nekotorykh novykh gruppakh goniatitov iz kamennougolnykh otlozhenii SSSR. Ezhegodnik vesuyuznogo paleontologicheskogo obshchestva 16: 246-273.