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来自维基百科,自由的百科全书
銳稜菊石(學名:Oxynoticeras),又名尖背菊石,是生存在侏羅紀海洋中的一屬菊石,為游速最快的菊石之一。[1]其化石分佈於歐洲及北美等地。[2]
銳稜菊石具有緊縮內旋的外殼和刀鋒般的腹稜,銳利的腹稜使牠們在水中游動時的阻力很小。縫合線複雜且有褶邊。體管從腹邊可見。[1]常見直徑為10厘米。[3]
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