Cheltonia

Cheltonia; Temporal range: Sinemurian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Ammonoidea
Superfamily:	Psiloceratoidea
Family:	Oxynoticeratidae
Genus:	Cheltonia; Buckman, 1904
Type species
	Ammonites accipitris Buckman, 1844;
Species
	Ch. accipitris Buckman, 1844; Ch. galeata Hoffmann, 1944; Ch. oustense Rakús & Guex, 2002;

Cheltonia is an extinct genus of ammonite from the Upper Sinemurian substage of Lower Jurassic of Europe, Africa,^[2] and America.^{[citation needed]} It is probably a microconch of genus Oxynoticeras.^[1]

Description[]

Ammonites belonging to this genus had small platyconic shell, on which the last whorl has been eccentrically coiled. Ventral rostrum could be preceded by 3 to 5 crawlings. Umbilicus took about 30—40% of diameter. Ribs were falcoid and weak. Suture has been the same as in the case of young Oxynoticeras.^[1]

References[]

^ Jump up to: ^a ^b ^c M. K. Howarth 2013. Treatise on Invertebrate Paleontology, Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eoderoceratoidea, Hildoceratoidea.
^ Cheltonia at Fossilworks.org

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[Howarth2013-1] Jump up to: ^a ^b ^c M. K. Howarth 2013. Treatise on Invertebrate Paleontology, Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eoderoceratoidea, Hildoceratoidea.

[FWCheltonia-2] Cheltonia at Fossilworks.org

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[2]