Gatunek typowy
A. ancestralis Bogoslovsky, 1979 from the Egedin Formation of the Urals.

Opis

Diagnosis. — Incipient septal vaulting expressed as an asymmetric angulation of the flank lobe, relatively involute conch with subtrapezoidal whorl cross section.

Remarks.— Bogoslovsky considered the type species of the genus ancestral to the branch of the Clymeniidae because its evolute conch and shallow flank lobe of the suture. The Polish species supports this interpretation. The incipient marginal vaulting of the septum seems to be inherited after a tornoceratid ancestor, preserved in the Cymaclymeniidae but apparently lost in the lineage of Clymenia. 

Synonimy

Zasięg czasowy

Literatura

Dzik, J. 2006. The Famennian "Golden Age" of conodonts and ammonoids in the Polish part of the Variscan sea. Palaeontologia Polonica 63, 1-359.