Cheltonia
Temporal range:
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: †Ammonoidea
Order: †Ammonitida
Family: †Oxynoticeratidae
Genus: †Cheltonia
Buckman, 1904
Type species
Ammonites accipitris
Buckman, 1844
Species
  • Cheltonia accipitris Buckman, 1844
  • Cheltonia galeata Hoffmann, 1944
  • Cheltonia 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. 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

  1. 1 2 3 M. K. Howarth 2013. Treatise on Invertebrate Paleontology, Part L, Revised, Volume 3B, Chapter 4: Psiloceratoidea, Eoderoceratoidea, Hildoceratoidea.
  2. ↑ Cheltonia at Fossilworks.org


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