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ammonoid

[古生] 菊石

1、内化

属节肢动物门,甲壳纲,十足目,爬一个是蛸亚纲(Coleoidea)又称为二腮亚纲,外壳已经消失或是内化。此亚(ammonoid 亚纲动物解剖方法亚纲: 前腮亚纲腮足强壮, 亚螯状,两肋足几乎等大腮足较细弱, 亚螯状,除底节板外腮足较细小,几乎同形, 亚 ...

ammonoid zone菊石带

ammonoid fossil菊石化石

ammonoid facies菊石相

ammonoid fauna菊石动物群

ammonoid assemblage菊石组合

Late Permian-Earliest Triassic Ammonoid Sequen湖南桑植县仁村坪上二叠统

生物学

n.one of the coiled chambered fossil shells of extinct mollusks

同义词：ammonite

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