1) Cretaceous ammonite
Found on
https://www.crosswordclues.com/clue/dipoloceras
Dipoloceras is a rather evolute, strongly ribbed and well keeled acanthocerataean ammonite from the Albian stage of the Lower Cretaceous included in the brancoceratid subfamily Mojsisovicziinae. The whorl section is typically inflated or depressed. Ribs are high standing, may be sharp, close to wide spaced. The ventral keel may sit below the level...
Found on
http://en.wikipedia.org/wiki/Dipoloceras
No exact match found.
