Glochiceras

Glochiceras is a haploceratid ammonite characterized by a small, smooth, compressed, evolute shells with large lappets and a median lateral groove. Its geographic distribution is fairly cosmopolitan, but it is limited stratigraphically to the Oxfordian and Kimmeridgian stages in the Upper Jurassic.^[2]

Glochiceras Temporal range: Oxfordian–Kimmeridgian[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:	†Haploceratidae
Genus:	†Glochiceras Hyatt, 1900
Species
See text

The earlier, Bajocian, Cadomoceras is similar overall, except for having a large ventral rostrum and spatulate lappets at the aperture, and coarse ventral plications.