Pristiorajea

Pristiorajea; Temporal range: Albian–Recent PreꞒ Ꞓ O S D C P T J K Pg N
	Sclerorhynchus, a sclerorhynchiform
	Green sawfish, a pristiform
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Superorder:	Batoidea
Clade:	Pristiorajea
Orders
	†Sclerorhynchiformes; Pristiformes;

Pristiorajea is a clade of rays containing the Sclerorhynchiformes and the Pristiformes. Members of this clade can be identified by their long, serrated rostrums; however, they are not to be mistaken with the unrelated but very similar-looking sawsharks.^[1] They have lived since the Middle Cretaceous period, with the earliest known member of this family being Onchopristis from the Albian period.

References

^ Jürgen Kriwet (2004). "The systematic position of the Cretaceous sclerorhynchid sawfishes (Elasmobranchii, Pristiorajea)" (PDF). In G. Arratia; A. Tintori (eds.). Systematics, Paleoenvironments and Biodiversity. Mesozoic Fishes. Vol. 3. Munich: Friedrich Pfeil. pp. 57–73. ISBN 3-89937-053-8.

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[1] Jürgen Kriwet (2004). "The systematic position of the Cretaceous sclerorhynchid sawfishes (Elasmobranchii, Pristiorajea)" (PDF). In G. Arratia; A. Tintori (eds.). Systematics, Paleoenvironments and Biodiversity. Mesozoic Fishes. Vol. 3. Munich: Friedrich Pfeil. pp. 57–73. ISBN 3-89937-053-8.

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