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[[Georges Cuvier]] first described a specimen of the winghead shark in 1817, as a footnote to his account of ''Squalus zygaena'' (=''Sphyrna zygaena'', the [[smooth hammerhead]]). Although his citation was not a proper [[binomial name]], Valenciennes interpreted it as ''Zygaena Blochii nobis'' when he described and illustrated the winghead shark in detail in 1822.<ref name="compagno">Compagno, Leonard J. V. (1984) ''Sharks of the World: An Annotated and Illustrated Catalogue of Shark Species Known to Date''. [[Rome]]: [[Food and Agricultural Organization]]. ISBN 92-5-101384-5.</ref> Compagno (1979, 1988) elevated the winghead shark to its own genus, ''Eusphyra'', although this was disputed by Dingerkus (1986) on the grounds that it made the genus ''[[Sphyrna]]'' [[paraphyletic]]. Since then, the winghead shark has been listed under its own genus or as a subgenus of ''Sphyrna'' in various sources.<ref name="martin"/>
{{cladogram|title=|align=left|caption=Phylogenetic relationships of hammerhead sharks, based on morphology, isozymes, and mitochondrial DNA.<ref name="cavalcanti">{{cite journal |author=Cavalcanti, M.J. |title=A Phylogenetic Supertree of the Hammerhead Sharks (Carcharhiniformes: Sphyrnidae) |journal=Zoological Studies |volume=46 |issue=1 |pages=
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