Kingdom Animalia Class Cephalopoda Family Poterioceratidae | Phylum Mollusca Order Oncocerida Rank Genus | |
Mecynoceras is a genus of Late Devonian oncocerids included in the Poterioceratidae, a family of subcircular to compressed exogastric cyrtocones without a hyponomic sinus.
Mecynoceras has a compressed, gibbous cyrtoconic shell. The venter, especially of the chambered phragmocone is convex in profile; the body chamber long and tubular. Septa are transverse, close spaced; the siphuncle large, subcentral, with actinosiphonate deposits.
Cyrtogomphus, Lysagoroceras, and Poterioceras are among related genera.
References
Mecynoceras Wikipedia(Text) CC BY-SA