Helicoprion Temporal range: Cisuralian-Guadalupian PreЄ Є O S D C P T J K Pg N Tooth-whorl, Utah Field House of Natural History Scientific classification Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Order: †Eugeneodontida Family: †Helicoprionidae Genus: †Helicoprion Karpinsky, 1899[1] Type species Helicoprion bessonowi Karpinsky, 1899 Species H. bessonowi Karpinsky, 1899 H. davisii Woodward, 1886 H. ergasaminon Bendix-Almgreen, 1966 ?H. karpinskii Obruchev, 1953 ?H. mexicanus Mullerried, 1945 ?H. svalis Siedlecki, 1970