Oecoptychius

Oecoptychius Temporal range: Bajocian–Callovian [1] PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	† Ammonoidea
Order:	† Ammonitida
Family:	† Strigoceratidae
Genus:	† Oecoptychius

Oecoptychius is an extinct genus of fossil ammonite cephalopods. The species lived during the Middle Jurassic. ^[1]

Taxonomic position

Oecophtychius was named by Neumayr^{[ who? ]} in 1878. It is placed into Oecoptychitidae, a family of dwarf ammonites established by Arkell^{[ who? ]}, 1957, that is a part of the superfamily Stephanoceratoidea.^{[ citation needed ]}

Diagnosis

Oecoptychius is an eccentrically coiled, dwarf ammonite. Inner whorls smooth, spheroidal; outer whorls with fine biplicate ribbing, ventral groove, and an acute elbow at half a whorl before the aperture; peristome contracted, with outwardly directed lappets.^{[ citation needed ]}

Distribution

Fossils of the Oecophtychius species have been found in Jurassic sediments of France, Germany and Madagascar. ^[2]

References

1. Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Archived from the original on 2016-02-25. Retrieved 2014-05-28.
2. "Fossilworks.org - Oecoptychius" . Retrieved 17 December 2021.

• W.J. Arkell, et al., 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L, Ammonoidea. Geological Society of America and University of Kansas Press.