cyrtocone

English

A oncocerid; its shell is a cyrtocone.

Etymology

From cyrto- +‎ cone.

Noun

cyrtocone (plural cyrtocones)

1. (malacology) A curved (cyrtoconic) form of the young shell that succeeds the more primitive orthocone in nautiloid cephalopods.

   Coordinate term: cyrtoceracone