Biology:Oecoptychius

From HandWiki
Short description: Genus of molluscs (fossil)


Oecoptychius
Temporal range: Bajocian–Callovian[1]
Scientific classification
Kingdom:
Phylum:
Class:
Subclass:
Order:
Superfamily:
Family:
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

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

Wikidata ☰ Q7078470 entry