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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（學名：Clymenia）是生存於泥盆紀法門期的一屬菊石，為生活在海底的肉食性動物。其外殼內旋，有寬闊、敞口的核心，表面光滑，有著模糊並微彎的生長線。腹面渾圓，縫合線簡單。[2]
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