1) Cretaceous ammonite
Found on
https://www.crosswordclues.com/clue/astiericeras
Astiericeras is an ammonite from the Lower Cretaceous, the shell of which is evolute, stout; outer whorl with strong, well spaced, transverse ribs that cross smoothly over the broad venter; early whorls with lateral tubercles. The outer, mature whorl separates from the coil but hooks back quickly, referred to as a heteromorph. Astiericeras is gene...
Found on
http://en.wikipedia.org/wiki/Astiericeras
No exact match found.
