Australiceras

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Australiceras
Temporal range: Aptian[1]
Australiceras sp., Late Jurassic to Early Cretaceous, Volga River, Russia - Houston Museum of Natural Science - DSC01900.JPG
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

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

Description[edit]

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.[citation needed]

The type species is Australiceras jacki.

References[edit]

Notes
  1. ^ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28. 
  2. ^ Paleobiology Database - Australiceras. 2014-05-29.
Bibliography
  • W. J. Arkell et al. 1957. Mesozoic Ammonoidea, Treatise on Invewrtebrate Paleontology, Part L. Geological Society of America, R.C.Moore, (ed)
  • F. W. Whitehouse. 1926. "The Cretaceous Ammonoidea of Eastern Australia", Memoirs of the Queensland Museum 8(3):195-242.