Mecynoceras

Mecynoceras
Temporal range: Late Devonian
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: †Oncocerida
Family: †Poterioceratidae
Genus: †
Foerste, 1926

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


This article is issued from Wikipedia. The text is available under Creative Commons Attribution-Share Alike 4.0 unless otherwise noted. Additional terms may apply for the media files.