Australiceras

Australiceras; Temporal range: Aptian PreꞒ Ꞓ O S D C P T J K Pg N
	Australiceras species
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Suborder:	†Ancyloceratina
Family:	†Ancyloceratidae
Genus:	†Australiceras; Whitehouse
Species
	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 family 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, some even considers that Australiceras is actually synonymous with Tropaeum,^[3] while others denying that.^[4]

The type species is Australiceras jacki.

References

Notes

^ Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
^ Paleobiology Database - Australiceras. 2014-05-29.
^ McKenzie, E. Donald; Rozefelds, Andrew C.; Deacon, Paula (2014-04-03). "An ancyloceratid ammonite from the Aptian Maryborough Formation, Queensland, Australia, and synonymy of Australiceras Whitehouse with Tropaeum Sowerby". Alcheringa: An Australasian Journal of Palaeontology. 38 (2): 256–265. doi:10.1080/03115518.2014.862062. ISSN 0311-5518.
^ Lehmann, Jens; Ifrim, Christina; Bulot, Luc; Frau, Camille (2015), Klug, Christian; Korn, Dieter; De Baets, Kenneth; Kruta, Isabelle (eds.), "Paleobiogeography of Early Cretaceous Ammonoids", Ammonoid Paleobiology: From macroevolution to paleogeography, Topics in Geobiology, Dordrecht: Springer Netherlands, pp. 229–257, doi:10.1007/978-94-017-9633-0_9, ISBN 978-94-017-9633-0, retrieved 2024-02-09

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.

Media related to Australiceras at Wikimedia Commons

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[Sepkoski_Ceph-1] Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.

[paleodb-2] Paleobiology Database - Australiceras. 2014-05-29.

[3] McKenzie, E. Donald; Rozefelds, Andrew C.; Deacon, Paula (2014-04-03). "An ancyloceratid ammonite from the Aptian Maryborough Formation, Queensland, Australia, and synonymy of Australiceras Whitehouse with Tropaeum Sowerby". Alcheringa: An Australasian Journal of Palaeontology. 38 (2): 256–265. doi:10.1080/03115518.2014.862062. ISSN 0311-5518.

[4] Lehmann, Jens; Ifrim, Christina; Bulot, Luc; Frau, Camille (2015), Klug, Christian; Korn, Dieter; De Baets, Kenneth; Kruta, Isabelle (eds.), "Paleobiogeography of Early Cretaceous Ammonoids", Ammonoid Paleobiology: From macroevolution to paleogeography, Topics in Geobiology, Dordrecht: Springer Netherlands, pp. 229–257, doi:10.1007/978-94-017-9633-0_9, ISBN 978-94-017-9633-0, retrieved 2024-02-09

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