†order Xenacanthiformes Berg 1955 (elasmobranch)

Chondrichthyes - Xenacanthiformes

Parent taxon: Xenacanthimorpha according to J. A. Long 2011

See also Cappetta 1987, Ginter et al. 2010, Heckert 2004, Murry 1989 and Nelson et al. 2016

Sister taxon: Bransonelliformes

Subtaxa: Diplodoselachidae Xenacanthidae Xenosynechodontidae

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Ecology: nektobenthic carnivore

Distribution:

• Triassic of Australia (2 collections), Austria (1), India (1), Poland (1), United States (13: Arizona, New Mexico, Texas)

• Severodvinian of the Russian Federation (3)

• Tatarian of the Russian Federation (4)

• Leonard of United States (7: Oklahoma, Texas)

• Wolfcamp of United States (6: New Mexico, Utah)

• Permian of Brazil (2), the Czech Republic (5), Germany (1), Norway (1), the Russian Federation (4), United States (30: Oklahoma, Texas)

• Desmoinesian of United States (1: Oklahoma)

• Pennsylvanian of the United Kingdom (1)

• Carboniferous to Permian of United States (1: New Mexico)

• Carboniferous of France (1), the United Kingdom (9), United States (4: Arizona, Illinois, Oklahoma)

Total: 98 collections including 112 occurrences

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