Carinoclymenia,new genus of family Rectoclymeniidae |
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| Abstract: | This new genus is based on the species Tornoceras? beuelense Lange, originally described from the top of the Prolobites horizon in the Fammenian stage of West Germany. Additional specimens from Aktyubinsk province (South Urals) show clearly by the dorsal position of the siphuncle that this is a clymeniid. The general shape of the suture line is close to that of other members of the family Rectoclymeniidae, to which this genus belongs. The flat phacoidal, involute shape of the shell with its carinifortn venter suggests derivation of Carinoclymenia from the phacoidalforms of Rectoclymenia. In West Germany C. beuelensis (Lange) occurs with Platyclymenia and Prionoceras in Fammenian zone LVα. In the Urals it is found with Prolobites and rare Prionoceras in the slightly older Fammenian zone IIIβ.-M. Gordon, Jr. |
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