Australiceras
| Australiceras Temporal range: Aptian |
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| Australiceras species | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Genus: | Australiceras Whitehouse |
| Species | |
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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.[citation needed]
Species
Seven species of Australiceras are recognized, A. gracile, A. hirtzi, A. irregulare, A. jacki, A. lampros, A. robustum, and A. transiente. The type species is Australiceras jacki.
References
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This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations. (April 2013) |
- 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.
- Paleobiology Database Australiceras entry
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