1) Mississippian ammonite
Found on
https://www.crosswordclues.com/clue/michiganites
Michiganites is a member of the ammonoid order Prolecanitida, named by Ruzhencev in 1962, which comes from the Meramacian stage of Mississippian Period (early Carboniferous Visian). The shell of Michiganites is discoidal and smooth, as for the family. The ventral lobe of the suture is expanded; three lobes are formed on either side. Michiganites i...
Found on
http://en.wikipedia.org/wiki/Michiganites
No exact match found.
