Schlotheimia
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''Schlotheimia'' is a genus of extinct cephalopods belonging to the subclass Ammonoidea that lived during the Hettangian stage at the beginning of the Early
Jurassic The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of ...
.Jack Sepkoski's list of Cephalopod general
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Description

The shell, or conch, of ''Schlotheimia'' rather evolute, coiled with all whorls exposed and only slightly embracing. The umbilicus is perforate as with more finely ribbed '' Angulaticeras''. whorls are compressed, bearing ribs that cross the venter in chevrons, less developed in '' Sulciferites''


Distribution

Fossils of ''Schlotheimia'' species have been found in Lower
Jurassic The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of ...
rocks of Argentina, Austria, Belgium, Canada, France, Germany, Indonesia, Italy, Luxembourg, Switzerland, United Kingdom, United States.


References


Further reading

* W. J. Arkell ''et al.'', 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Geological Society of America and University of Kansas Press. Schlotheimiidae Ammonitida genera Jurassic ammonites Ammonites of Asia Jurassic Asia Jurassic ammonites of Europe Jurassic Italy Jurassic ammonites of North America Jurassic Canada Jurassic United States Ammonites of South America Jurassic Argentina {{Ammonitina-stub