1) Cretaceous ammonite
Found on
https://www.crosswordclues.com/clue/spitidiscus
Spitidiscus is an ammonite genus placed in the family Holcodiscidae. Member species have a rather evolute shell in which the whorl section is more or less circular, venter broadly rounded and dorsum fairly deeply impressed. Close, fine low, single or rarely branching ribs are interspersed by frequent straight or slightly sinous, moderately deep bu...
Found on
http://en.wikipedia.org/wiki/Spitidiscus
No exact match found.
