Chondrichthyes - Hybodontiformes - Polyacrodontidae
Full reference: L. S. Glükman. 1964. Class Chondrichthyes, cartilaginous fishes. Subclass Elasmobranchii (sharks). In D. V. Obruchev (ed.), Fundamentals of Paleontology. Vol. XI. Agnatha, Pisces. Izdatel'stvo "Nauka", Moscow 292-352
Parent taxon: Hybodontoidea according to M. Ginter et al. 2010
See also Biddle 1993, Cahuzac et al. 2007, Chhabra and Mishra 2002, Chrzastek 2008, Delsate 2003, Delsate et al. 2002, Duffin 1993, Duffin 1998, Everhart 2004, Johns 1997, Murry 1989, Nelson et al. 2016, Skinner et al. 2020, Underwood and Rees 2002 and Yamagishi 2004
Sister taxa: Acrodontidae, Acrorhizodus, Asteracanthus semiverrucosus, Asteracanthus verrucosus, Diablodontus, Distobatidae, Homalodontidae, Hybodontidae, Hybodus strictus, Lamarodus, Lissodus, Lonchidiidae, Trichorhipis, Tristychiidae
Subtaxa: Diplolonchidion Polyacrodus Roongodus
Ecology: nektonic carnivore
Distribution:
• Cretaceous of Brazil (1 collection), Canada (1: Alberta), Denmark (1), France (5), Kazakhstan (1), Poland (1), the Russian Federation (3), Spain (7), Sweden (4), the United Kingdom (19), United States (11: Kansas, Texas, Utah, Wyoming), Uzbekistan (1)
• Jurassic to Cretaceous of France (2), Morocco (1)
• Jurassic of Belgium (1), China (2), France (6), India (1), Kyrgyzstan (2), Tunisia (1), the United Kingdom (1)
• Triassic of Belgium (5), Canada (1: British Columbia), China (1), France (9), Germany (8), Greenland (1), India (1), Japan (6), Luxembourg (1), the Netherlands (1), Poland (2), the Russian Federation (5), Svalbard and Jan Mayen (2), the United Kingdom (10), United States (3: Nevada, Texas)
• Permian of China (1), Iran (2), the Russian Federation (5), United States (10: Oklahoma, Texas)
Total: 146 collections including 172 occurrences