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
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
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. 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. 3. Munich: Friedrich Pfeil. pp. 57–73. ISBN 3-89937-053-8.