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来自维基百科,自由的百科全书
圓柱箭石(學名:Cylindroteuthis)是生存於早侏羅紀至早白堊紀的一屬箭石,生活在較深的大陸棚海域中,為肉食性動物。牠們是體型最大的箭石之一,其長度能長到25公分。[2]其化石分佈於舊蘇聯地區、墨西哥、瑞士和美國等地。[3]
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