1) Cretaceous ammonite
Found on
https://www.crosswordclues.com/clue/didymoceras
Didymoceras is an extinct genus of ammonite cephalopod. It is one of the most bizarrely shaped genera, with a shell that spirals upwards into a loose, hooked tip. It is thought to have drifted in the water vertically, moving up and down. The generic name is Latin for `paired horns`. Its taxonomic place is often in flux, being placed in either Tu.....
Found on
http://en.wikipedia.org/wiki/Didymoceras
No exact match found.
