Alopiidae

Alopiidae; Temporal range: Late Cretaceous–recent (Maastrichtian–Holocene), 70–0 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Pelagic thresher (A. pelagicus)
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Division:	Selachii
Order:	Lamniformes
Family:	Alopiidae; Bonaparte, 1838
Genera
	Alopias; †Anotodus?; †Paranomotodon; †Usakias; †Trigonotodus?;

Alopiidae is a family of large mackerel sharks (order Lamniformes).^[1] The only extant genus is the thresher shark (Alopias). The extinct genera Anotodus, Paranomotodon, Usakias and Trigonotodus have been proposed as members of this family.^[2]^[3]

It is believed that thresher sharks originated from a common ancestor that appeared in the Late Cretaceous, at least 70 million years ago. The first thresher sharks of the genus Alopias appeared about 50 million years ago.^{[citation needed]} Trigonotodus is known from the Oligocene.^[4]

References

↑ Carrillo-Briceño, Jorge D.; Villafaña, Jaime A.; Gracia, Carlos De; Flores-Alcívar, F. Fernando; Kindlimann, René; Abella, Juan (April 29, 2020). "Diversity and paleoenvironmental implications of an elasmobranch assemblage from the Oligocene–Miocene boundary of Ecuador". PeerJ. 8 e9051. doi:10.7717/peerj.9051. ISSN 2167-8359. PMC 7195833.
↑ Bampi, H., Granzotti, D.S. (2006). "Taxonomic and morphometric revision of Alopiidae (Lamniformes) shark family: a qualitative holistic approach based on dental characters". Historical Biology.{{cite journal}}: CS1 maint: multiple names: authors list (link)
↑ Kozlov, V.A. (2000). (Systematics and evolution of sharks from family AIopiidae (based on the materials from Palaeogene deposits of Middle Asia and western Kazakhstan)). Materialy po Stratigrafii i Paleontologii Urala. pp. 142–147.
↑ Jim Bourdon (2006). "Thresher sharks — Lower Eocene - Recent". elasmo.com.

[1] Carrillo-Briceño, Jorge D.; Villafaña, Jaime A.; Gracia, Carlos De; Flores-Alcívar, F. Fernando; Kindlimann, René; Abella, Juan (April 29, 2020). "Diversity and paleoenvironmental implications of an elasmobranch assemblage from the Oligocene–Miocene boundary of Ecuador". PeerJ. 8 e9051. doi:10.7717/peerj.9051. ISSN 2167-8359. PMC 7195833.

[2] Bampi, H., Granzotti, D.S. (2006). "Taxonomic and morphometric revision of Alopiidae (Lamniformes) shark family: a qualitative holistic approach based on dental characters". Historical Biology.{{cite journal}}: CS1 maint: multiple names: authors list (link)

[3] Kozlov, V.A. (2000). (Systematics and evolution of sharks from family AIopiidae (based on the materials from Palaeogene deposits of Middle Asia and western Kazakhstan)). Materialy po Stratigrafii i Paleontologii Urala. pp. 142–147.

[4] Jim Bourdon (2006). "Thresher sharks — Lower Eocene - Recent". elasmo.com.

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