Protosqualus pachyrhiza
Underwood & Mitchell, 1999
Classification: Elasmobranchii Squaliformes Squalidae
Reference of the original description
Albian and Cenomanian (Cretaceous) selachian faunas from north east England. Special Papers in Palaeontology, 60, 9–56
Albian and Cenomanian (Cretaceous) selachian faunas from north east England. Special Papers in Palaeontology, 60, 9–56
Types
Protosqualus pachyrhiza
Protosqualus pachyrhiza
Description:
Citation: Protosqualus pachyrhiza Underwood & Mitchell, 1999: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 04/2025
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References
Bioluminescence and repeated deep-sea colonization shaped the diversification and body size evolution of squaliform sharks. Proceedings of the Royal Society B-Biological Sciences, 292(2042), Article 20242932
DOI: 10.1098/rspb.2024.2932
Fossil record and origin of squaliform sharks (Chondrichthyes, Neoselachii). In Gallucci, V.F. & McFarlane, G.A. & Bargmann, G.G. (Eds). Biology and management of dogfish sharks. American Fisheries Society. Bethesda, Maryland: 19–38

Bioluminescence and repeated deep-sea colonization shaped the diversification and body size evolution of squaliform sharks. Proceedings of the Royal Society B-Biological Sciences, 292(2042), Article 20242932
DOI: 10.1098/rspb.2024.2932

Fossil record and origin of squaliform sharks (Chondrichthyes, Neoselachii). In Gallucci, V.F. & McFarlane, G.A. & Bargmann, G.G. (Eds). Biology and management of dogfish sharks. American Fisheries Society. Bethesda, Maryland: 19–38