Hlawiceras

Hlawiceras is an extinct genus from a well known subclass of fossil cephalopods known informally as ammonites that lived during the Jurassic Period, which lasted from approximately 200 to 145 million years ago.

Hlawiceras Temporal range: Bajocian[1] PreꞒ Ꞓ O S D C P T J K Pg N ↓
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Ammonoidea
Order:	Ammonitida
Family:	Stephanoceratidae
Genus:	Hlawiceras [2]

Hlawiceras belongs to the family Stephanoceratidae,true ammonites, which is contained in the Stephanoceratoidea. It is probably synonymous with the better known Garantiana

Hlawiceras(Garantiana) has an evolute discoidal shell with a subcircular cross section and close spaced transverse ribbing.

References

1. Sepkoski, Jack (2002). "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 363: 1–560. Archived from the original on 2008-05-07. Retrieved 2017-10-18.
2. "Paleobiology Database - Hlawiceras". Retrieved 2017-10-19.

• Classification of the Jurassic Ammonitina, D. T. Donovan and J. H. Calloman 1981, in The Ammonoidea, edited by M.R. House and J.R. Senior;