Grammoceras
id:
grammoceras-290-17183348
title:
Grammoceras
text:
Grammoceras is an extinct genus of ammonite found in Yorks Ravenscar, England, from Jurassic period sediments. Its overall distribution is fairly worldwide. Grammoceras has a thin, discoidally evolute shell with simple, gently sigmoid ribbing and a low ventral keel. Dumortiera and Catulloceras from the same age are similar except that Dumortiera has a more rounded venter and Catulloceras has a subquadrate whorl section. Asthenoceras from the slightly younger lower Bajocian may be a subgenus.
brand slug:
wiki
category slug:
encyclopedia
description:
Genus of ammonite
original url:
https://en.wikipedia.org/wiki/Grammoceras
date created:
date modified:
2023-12-20T17:10:06Z
main entity:
{"identifier":"Q5593715","url":"https://www.wikidata.org/entity/Q5593715"}
image:
fields total:
13
integrity:
14