旋齒鯊科（學名：Helicoprionidae）是尤金齒目下的一個科。首次於晚石炭紀(二億八千萬年)前出現 , 在二疊紀大量繁盛起來 , 至三疊紀早期滅絕。對它們的認識僅限於發現一些螺旋形並有鋸齒切邊的牙齒化石。
下屬分類
本科包括以下屬：[2]
- 阿格賽茲鯊屬 Agassizodus iSt.John & Worthen, 1875
- Arpagodus Trautschold, 1879
- 曲鋸鯊屬 Campyloprion Eastman, 1902
- 旋齒鯊屬 Helicoprion iKarpinsky, 1899
- 湖南旋齒鯊屬 Hunanohelicoprion Liu, 1994
- Karpinskiprion Karpinsky, 1922
- 副旋齒鯊屬 Parahelicoprion Karpinski, 1924
- Shaktauites Tchuvashov, 2001
- 沙寇鋸鯊屬 Sarcoprion Nielsen, 1952
- 中華旋齒鯊屬 Sinohelicoprion Liu & Chang, 1963
- 弓鋸鯊屬 Toxoprion Hay, 1910
參考文獻
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