Gatunek typowy
Ramosites ramosus Ruzhentsev & Bogoslovskaia, 1969

Opis

Conch pachyconic to subdiscoidal with completely involute whorls; umbilical walls diverge slightly only in large specimens; umbilicus tight to very tight, slightly step-like, only in completely grown forms; sculpture well developed, represented by dichotome riblets; doubling takes place on a considerable, and constantly growing, distance from the umbilical rim; riblets proceed radially in young specimens and often form a significant ventral sinus in adults; ventral lobe wide from the beginning, widens strongly in course of evolution; median saddle well developed.

Synonimy

Zasięg czasowy

Carboniferous; Bashkirian-Moscovian

Literatura

Ruzhencev, V.E. & Bogoslovskaya, M. F. 1969. Revision of the family Dimorphoceratidae. Paleontological Journal 3: 43-56.

Ruzhencev, V.E & Bogoslovskaya, M.F. 1978. Namurskiy etap v evolutsii ammonoidey. Pozdnenamurskiye ammonoidei. Trudy Paleontologicheskogo Instituta Akademii Nauk SSSR 167: 1-336.