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海神石科的一属软体动物(化石) 来自维基百科,自由的百科全书
海神石(学名:Clymenia)是生存于泥盆纪法门期的一属菊石,为生活在海底的肉食性动物。其外壳内旋,有宽阔、敞口的核心,表面光滑,有着模糊并微弯的生长线。腹面浑圆,缝合线简单。[2]
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