Perisphinctes

Perisphinctes is an extinct genus of ammonite cephalopod. They lived during the Middle to Late Jurassic epochs and serve as an index fossil for that time period.^[5] The species P. boweni was named after the English chemist and geologist E. J. Bowen (1898–1980).^[6]

Perisphinctes Temporal range: Callovian–Tithonian[1] PreꞒ Ꞓ O S D C P T J K Pg N
Exhibit from the Museum of Natural History in Berlin
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Perisphinctidae
Subfamily:	†Perisphinctinae
Genus:	†Perisphinctes Waagen, 1869[2]
Type species
Ammonites variocostatus[3] Buckland, 1836
Species[4]
P. abadiensis P. arussiorum P. birmensdorfensis P. choffati P. gallarum P. hillebrandti P. jubailensis P. parandieri P. picteti P. roubyanus P. stenocyclus P. variocostatus

Distribution

Cephalopods of species belonging to this genus have been found in the Jurassic of Antarctica, Argentina, Chile, Cuba, Egypt, Ethiopia, France, Germany, Hungary, India, Iran, Italy, Japan, Madagascar, Poland, Portugal, Russia, Saudi Arabia, Spain, Switzerland, the United Kingdom and Yemen.^[4]

Gallery

• 
  Perisphinctes virguloides
• 
  Perisphinctes choffati
• 
  Perisphinctes plicatilis
• 
  Perisphingtes oxfordien

References

• Paleontology portal

1. "A compendium of fossil marine animal genera (Cephalopoda entry)". Bulletins of American Paleontology. 2002. pp. 1–560. Archived from the original on 2016-02-25. Retrieved 2017-10-18.
2. Waagen, W. (1869). "Die Formenreihe des Ammonites subradatus". Geognostisch-Paläontologischen Beiträgen. 2 (2). München: R. Oldenbourg: 248. hdl:2027/nnc1.0030928605.
3. Hemming, Francis (1954). "Opinion 303: Designation, under the Plenary Powers, of type species in harmony with current usage for the nominal genera Kosmoceras, Perisphinctes and Harpoceras (class Cephalopoda, order Ammonoidea) established by Waagen in 1869". Opinions and Declarations Rendered by the International Commission on Zoological Nomenclature. 8 (20): 273–284.
4. "Paleobiology Database - Perisphinctes". Retrieved 17 December 2021.
5. Index Fossils, United States Geological Service, USA.
6. Bell, R. P. (November 1981). "Edmund John Bowen 29 April 1898 – 19 November 1980 Elected F.R.S. 1935". Biographical Memoirs of Fellows of the Royal Society. 27: 83–101. doi:10.1098/rsbm.1981.0004. JSTOR 769866.