''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]
/ref>
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