Oecoptychius
{{Short description|Genus of molluscs (fossil)}}
{{italic title}}
{{Taxobox
|name = Oecoptychius
|fossil_range = {{fossil range|Bajocian|Callovian|ref={{cite web |last= Sepkoski |first= Jack |title= Sepkoski's Online Genus Database |year= 2002 |url= http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class |accessdate= 2014-05-28 |archive-date= 2016-02-25 |archive-url= https://web.archive.org/web/20160225225905/http://strata.geology.wisc.edu/jack/showgenera.php?taxon=231&rank=class |url-status= dead }}}}
|regnum = Animalia
|phylum = Mollusca
|classis = Cephalopoda
|subclassis = Ammonoidea
|ordo = Ammonitida
|superfamilia = Haploceratoidea
|familia = Strigoceratidae
|genus = Oecoptychius
}}
Oecoptychius is an extinct genus of fossil ammonite cephalopods. The species lived during the Middle Jurassic.
Taxonomic position
Oecophtychius was named by Neumayr{{who|date=March 2015}} in 1878. It is placed into Oecoptychitidae, a family of dwarf ammonites established by Arkell{{who|date=March 2015}}, 1957, that is a part of the superfamily Stephanoceratoidea.{{citation needed|date=March 2015}}
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|date=March 2015}}
Distribution
Fossils of the Oecophtychius species have been found in Jurassic sediments of France, Germany and Madagascar.{{cite web | title= Fossilworks.org - Oecoptychius |url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=15276 |access-date= 17 December 2021 }}
References
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- W.J. Arkell, et al., 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L, Ammonoidea. Geological Society of America and University of Kansas Press.
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Category:Prehistoric animals of Madagascar
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