Gleviceras

Gleviceras is an ammonite genus (order Ammonitida) that lived during the Early Jurassic Period, found in Canada, Hungary, Mexico and the United Kingdom.

Gleviceras Temporal range: Sinemurian[1] PreꞒ Ꞓ O S D C P T J K Pg N
Fossil of Gleviceras guabalianum
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Oxynoticeratidae
Genus:	†Gleviceras Buckman, 1918
Synonyms
Glevumites Buckman, 1924 Guibaliceras Buckman, 1918 Riparioceras Schindewolf, 1962 Tutchericeras Buckman, 1919 Victoriceras Buckman, 1918

Glevumites Buckman 1924, Guibaliceras Buckman 1918, Riparioceras Schindewolf 1962, Tutchericeras Buckman 1919, and Victoriceras Buckman 1918 are considered synonyms.

Description

Gleviceras produced laterally compressed involute shells with a small umbilicus, close spaced sinuous ribbing, and a sharp keel along venter. The suture is ammonitic with deep narrow complex lobes. It is similar to Oxynoticeras except for being less narrow and having a more rounded venter. Fastigiceras differs primarily in having an occluded umbilicus.

Taxonomy

Gleviceras was described by Buckman in 1918 and is included in the Family Oxynoticeratidae and superfamily Psiloceratoidea. Species include:

• Gleviceras doris Reynes, 1879
• Gleviceras guibalianum D'orbigny, 1844
• Gleviceras iridescens Tutcher and Trueman, 1925
• Gleviceras lotharingius Reynes, 1879
• Gleviceras palomense Erben, 1956

Gleviceras is closely related to the genera Cheltonia, Hypoxynoticeras, Oxynoticeras, Paracymbites, Paroxynoticeras, Radstockiceras and Slatterites.