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Bigelow, H.B. and W.C. Schroeder, 1948. Sharks. Mem.Sears Found.Mar.Res., (1):53-576

Garrick, J.A.F. and L.J. Paul, 1971. Heptranchias dakini Whitley, 1931, a synonym of H. perlo (Bonnaterre, 1788), the sharpnosed sevengill or perlon shark, with notes on sexual dimorphism in this species. Zool.Publ. Vict.Univ.Wellington, (54):14 p.

Bass, A.J., J.D. D'Aubrey and N. Kistnasamy, 1975c. Sharks of the east coast of southern Africa. 5. The families Hexanchidae, Chlamydoselachidae, Heterodontidae, Pristiophoridae and Squatinidae. Invest.Rep.Oceanogr.Res.Inst., Durban, (43):50 p.

Sharpnose sevengill shark (Heptranchias perlo)