特诺拉虫(学名:Ktenoura),又名科坦虫、棒鞍虫,是生存于志留纪的一属三叶虫,生活在大陆棚上。这种三叶虫的外骨骼为长形,胸部分为11节。面线为原颊虫式,与头部侧缘相交。颊与肋叶很窄,眼睛长在前部靠近头鞍的地方。头鞍突起,朝前方逐渐变宽。体节间突出与凹窝铰合的复杂结构使其紧紧卷起。尾甲大小中等,有三对向后弯曲的长棘。[1]
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