Ancistroceras
id:
ancistroceras-302-13941303
title:
Ancistroceras
text:
Ancistroceras is one of the two ancestral lituitids from the late Early Ordovician (Arenigian). The other being Holmiceras. The shell is weakly annulate, starts off with 1.5 to 2 contiguous or slightly separated whorls followed by a rapidly expanding orthocone with an apical angle of about 30 deg. Growth lines are sinuous, show a pronounced hyponomic sinus in the coiled juvenile portion at the apex but almost none at the mature aperture of the orthcone. Holmiceras is similar except that its whor
brand slug:
wiki
category slug:
encyclopedia
description:
original url:
https://en.wikipedia.org/wiki/Ancistroceras
date created:
date modified:
2023-07-18T19:14:49Z
main entity:
{"identifier":"Q4753065","url":"https://www.wikidata.org/entity/Q4753065"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/4/4c/Ancistroceras_undulatum_01.jpg","width":2892,"height":1362}
fields total:
13
integrity:
14