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Perisphinctes

Perisphinctes is an extinct genus of ammonite cephalopod. They lived during the Jurassic Period and serve as an index fossil for that time period.

1、三义菊石

... 易裂海胆目 Perischoechinoidea 三义菊石 Perisphinctes 奇蹄目 Perissodactyla ...

2、菊石

在离开小岛大约1公里以后，这条Cryptoclidus遇上了这个地区最大菊石之一的旋菊石（Perisphinctes），后者正慢条斯理地巡视珊瑚礁。旋菊石螺旋形外壳的直径长达1米，是可怕的肉食动物。

Perisphinctes Perisphinctes tiziani侏罗纪期间

地球科学

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