腹菊石（学名：Gastrioceras），又名腹棱角石，是生存在晚石炭纪至晚二叠纪海洋中的一属菊石。牠们的游水能力很差。[2]
特征
腹菊石的外壳内旋，有宽阔而深的核心。旋环紧密地挤压在一起，并有宽阔、略圆的腹。壳体侧面的结节组成了横贯腹部的肋条。缝合线为许多线条分明的褶皱，褶皱的前部是圆的，后部则是尖的。[2]
物种[1]
- Gastrioceras (Lissogastrioceras)
- Gastrioceras formosum
- Gastrioceras glenisteri
- Gastrioceras liratum
- Gastrioceras listeri
- Gastrioceras magoffinense
- Gastrioceras melvillensis
- Gastrioceras montgomeryense
- Gastrioceras noduliferum
- Gastrioceras occidentale
- Gastrioceras planorbiformis
- Gastrioceras prone
- Gastrioceras retiferum
- Gastrioceras richthofeni
- Gastrioceras williamsi
参考文献
外部链接
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