Chondrichthyes - Hexanchiformes - Hexanchidae
Synonym: Eonotidanidae Pfiel 1983
Parent taxon: Hexanchiformes according to I. Feichtinger et al. 2024
See also Bendix-Almgreen 1983, Bogan et al. 2016, Cahuzac et al. 2007, Carnevale 2007, Case and Cappetta 1997, Cione and Reguero 1994, Cvancara and Hoganson 1993, dos Santos et al. 2024, Hay 1902, Jordan 1963, Kent 2018, Kumar and Loyal 1987, Landau et al. 2025, Long 1992, Long et al. 1993, Nelson et al. 2016, Popov et al. 2025, Rapp 1946, Rees 2000, Siverson 1997, Thies 1983, Underwood 2006, van der Laan 2019, Villafaña et al. 2020 and Welton 1974
Sister taxa: Chlamydoselachidae, Crassonotidae, Heptranchidae, Hexanchoidei, Komoksodontidae, Orthacodidae, Paraheptranchias, Paranotidanus
Subtaxa: Eonotidanus Gladioserratus Hexanchus Monopterhinus Notidanion Notidanodon Notidanus Notorhynchus Notorynchus Protoheptranchias Weltonia Xampylodon
Type: Eonotidanus
Ecology: nektonic carnivore
Distribution:
• Quaternary of Brazil (1 collection), Chile (1), Italy (1), United States (7: California, South Carolina)
• Pliocene of Australia (1), Belgium (3), Chile (2), Italy (3), Mexico (1), the Netherlands (2), Peru (1), Portugal (1), United States (1: North Carolina)
• Hemphillian of United States (1: California)
• Miocene to Pliocene of Argentina (1), Australia (1), United States (1: California)
• Miocene of Algeria (1), Australia (5), Austria (2), Belgium (5), Chile (2), Costa Rica (1), Denmark (2), France (17), Germany (2), Hungary (1), India (1), Italy (1), Japan (7), Malta (2), Mexico (1), the Netherlands (3), New Zealand (2), Peru (1), Poland (2), Portugal (7), Slovakia (2), South Africa (1), United States (18: California, Delaware, Florida, Maryland, New Jersey, North Carolina, South Carolina, Virginia)
• Waitakian of New Zealand (1)
• Oligocene of Australia (2), Belgium (3), France (1), Germany (4), Hungary (1), Japan (6), the Netherlands (1), New Zealand (2), Ukraine (1), United States (2: California, North Carolina)
• Eocene of Antarctica (4), Argentina (3), Australia (3), Belgium (4), Chile (1), Denmark (2), Egypt (15), France (10), India (2), Italy (1), Japan (1), Jordan (3), Namibia (1), the Netherlands (5), New Zealand (2), the Russian Federation (4), Spain (1), Ukraine (3), the United Kingdom (11), United States (5: Oregon, South Carolina, Virginia, Washington), Uzbekistan (1)
• Paleocene to Eocene of France (1)
• Paleocene of Austria (4), Belgium (5), Bulgaria (1), Denmark (3), France (3), Kazakhstan (1), Morocco (1), New Zealand (2), the Russian Federation (1), Sweden (2), United States (4: California, New Jersey)
• Cretaceous to Paleogene of Antarctica (1), United States (1: New Jersey)
• Cretaceous of Angola (3), Antarctica (10), Argentina (1), Australia (1), Austria (6), Belgium (1), Canada (2: British Columbia), Egypt (1), France (4), Germany (14), Greece (1), India (1), Israel (5), Japan (14), Lebanon (2), Lithuania (1), Morocco (1), New Zealand (3), Poland (1), the Russian Federation (4), Syria (3), Ukraine (3), the United Kingdom (60), United States (5: California, North Carolina, South Dakota, Texas)
• Jurassic of France (2), Germany (1), Poland (1), Sweden (1)
• Permian of Japan (1)
Total: 404 collections including 464 occurrences