Australiceras

Australiceras
Temporal range: Aptian[1]
Australiceras species
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Ammonoidea
Genus: Australiceras
Whitehouse
Species [2]
  • A. gracile
  • A. hirtzi
  • A. irregulare
  • A. jacki
  • A. lampros
  • A. robustum
  • A. transiente
Wikimedia Commons has media related to Australiceras.

Australiceras is an extinct ammonite genus from the upper part of the Early Cretaceous, Aptian stage, included in the Ancyloceratidae.

Description

Australiceras has an evolute shell, coiled with all whorls showing in keeping with its inclusion in the Ancyloceratida. The inner, early, whorls bear ribs that alternate between those that are smooth and those the bear stout blunt or conical tubercles. Ribs on the outer whorls become free of tubercles and end up all smooth.

Australiceras bears some resemblance to Tropaeum and Balearites, both related genera.

The type species is Australiceras jacki.

References

Notes
  1. Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
  2. Paleobiology Database - Australiceras. 2014-05-29.
Bibliography
This article is issued from Wikipedia - version of the Thursday, March 10, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.