criocone

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criocone (plural criocones)

1. (malacology) An organism or fossil with a crioconic shell, or such a shell itself.
   • 2002, K. Histon, Albert Daurer, Cephalopods, present and past:

     Small planospiral criocones with partially coiled whorls (microconchs) or completely uncoiled (macroconchs). Whorl-section hexagonal, rounded up to round. The protoconch and the first whorl unknown, but [...]

criocone

1. (malacology) Crioconic.
   • 1927, Sydney Savory Buckman, Martin Simpson, George Young, Type Ammonites:

     [...] disturbance to such a form might produce rapid acceleration in two ways — in shape, from serpenticone to criocone, in ornament, from tuberculate to costate, that is, costate post-tuberculate.

• coercion