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Notidanodon; Temporal range: Tithonian–Thanetian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Chondrichthyes
Subclass:	Elasmobranchii
Order:	Hexanchiformes
Family:	Hexanchidae
Genus:	†Notidanodon; Cappetta, 1975
Species
	N. pectinatus ; N. lanceolatus;

Notidanodon is an extinct genus of cow shark. Fossils ascribed to this genus are known from the Jurassic and Cretaceous periods. Recently, the genus underwent a major revision and was split into two after the erection of Xampylodon to accommodate the species X. dentatus, X. loozi, and X. brotzeni.^[1] The genus is now known only from New Zealand, Antarctica, Africa, and South America.^[2]

Species

The earliest occurrences of attributed specimens are from the Tithonian of New Zealand, and the latest are from the Maastrichtian of Antarctica. Currently, only two Mesozoic species, Notidanodon pectinatus and Notidanodon lanceolatus, are attributed to the genus. A putative third species, Notidanodon antarcti, appears only in the caption of Figure 2 in Grande and Chatterjee (1987), but the same material was treated as Notidanodon sp. in the main text. Later, N. antarcti was considered a nomen dubium and regarded as a junior synonym of Notidanodon pectinatus.^[3]

References

^ Cappetta, Henri; Morrison, Kurt; Adnet, Sylvain (2021-12-10). "A shark fauna from the Campanian of Hornby Island, British Columbia, Canada: an insight into the diversity of Cretaceous deep-water assemblages". Historical Biology. 33 (8): 1121–1182. Bibcode:2021HBio...33.1121C. doi:10.1080/08912963.2019.1681421. ISSN 0891-2963. S2CID 212878837.
^ "Fossilworks: Notidanodon". fossilworks.org. Retrieved 17 December 2021.
^ Cappetta, Henri; Grant-Mackie, Jack (2018-09-21). "Discovery of the most ancient Notidanodon tooth (Neoselachii: Hexanchiformes) in the Late Jurassic of New Zealand. New considerations on the systematics and range of the genus". Palaeovertebrata. 42 (1): e1. doi:10.18563/pv.42.1.e1. ISSN 0031-0247. S2CID 92722893.

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[1] Cappetta, Henri; Morrison, Kurt; Adnet, Sylvain (2021-12-10). "A shark fauna from the Campanian of Hornby Island, British Columbia, Canada: an insight into the diversity of Cretaceous deep-water assemblages". Historical Biology. 33 (8): 1121–1182. Bibcode:2021HBio...33.1121C. doi:10.1080/08912963.2019.1681421. ISSN 0891-2963. S2CID 212878837.

[2] "Fossilworks: Notidanodon". fossilworks.org. Retrieved 17 December 2021.

[3] Cappetta, Henri; Grant-Mackie, Jack (2018-09-21). "Discovery of the most ancient Notidanodon tooth (Neoselachii: Hexanchiformes) in the Late Jurassic of New Zealand. New considerations on the systematics and range of the genus". Palaeovertebrata. 42 (1): e1. doi:10.18563/pv.42.1.e1. ISSN 0031-0247. S2CID 92722893.

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