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|regnum = Animalia |phylum = Mollusca |classis = Cephalopoda |subclassis = Ammonoidea |genus = ''Australiceras'' |genus_authority = Whitehouse |subdivision_ranks = Species 〔(Paleobiology Database - Australiceras ). 2014-05-29.〕 |subdivision = * ''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 == ''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''. 抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Australiceras」の詳細全文を読む スポンサード リンク
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