Protospinax heterodon
Underwood & Mitchell, 1999
Classification: Elasmobranchii incert. sedis Protospinacidae
	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
Protospinax heterodon
	
	
	
Protospinax heterodon
Description:
Citation: Protospinax heterodon Underwood & Mitchell, 1999: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 11/2025
		References
		
	
		
		
			
Sharks and rays. In Field Guide to Fossils Number 12: Fossils of the Gault Clay J. R. Young(Editor), A. S. Gale(Editor), R. I. Knight(Editor), Dr Andrew B. Smith(Editor): 275–299
	
	

Sharks and rays. In Field Guide to Fossils Number 12: Fossils of the Gault Clay J. R. Young(Editor), A. S. Gale(Editor), R. I. Knight(Editor), Dr Andrew B. Smith(Editor): 275–299
				
				
    					
    					
    					
    					
                        
    					







