北极棘鲨属
银鲛目的一属已灭绝鱼类 来自维基百科，自由的百科全书
北极棘鲨属（學名：Arctacanthus）为弓鮫目的一个属。生存於二疊紀吳家坪期 ，且可能存活至三疊紀。
本属包括以下物种：[2]
- Arctacanthus exiguus Yamagishi, 2004
- Arctacanthus uncinatus Nielsen, 1932
- 怀俄明北极棘鲨 Arctacanthus wyomingensis Branson, 1934
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