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Rodzina Dimorphoceratidae
Opis Completely involute suboxyconic to pachyconic shell with sculpture consisting only of growth lines, umbilicus closed; sometimes with delicate spiral ornamentation; whorls completely involute; ventral lobe becoming extremely wide by subdivision. Synonimy Zasięg czasowy Carboniferous; Der Erdbacher Kalk base to Chokierian Literatura Hyatt, A. 1884. Genera of fossil cephalopods. Boston Society of Natural History, Proceedings 22: 253-338, Boston, Mass. |
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