†family Symmoriidae Dean 1909 (elasmobranch)

Chondrichthyes - Symmoriiformes - Symmoriidae

Synonym: Stethacanthidae Lund 1974

Parent taxon: Symmoriiformes according to M. Ginter 2018

See also Coates and Sequeira 2001, Ginter et al. 2010, Goto et al. 1988, Ivanov 1999, Ivanov and Lebedev 2014, Ivanov et al. 2013, Lund 1985, Lund 1986, Williams 1985 and Zangerl 1981

Sister taxa: Denaeidae, Falcatidae, Kawichthys, Kungurodus, Stemmatias

Subtaxa: Akmonistion Bethacanthus Cobelodus Danaea Gutturensis Orestiacanthus Petrodus Physonemus chesterensis Physonemus parvulus Stethacanthulus Stethacanthus Symmorium

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Ecology: nektonic carnivore

Distribution:

• Miocene to Pliocene of Bolivia (1 collection)

• Miocene of Panama (2)

• Permian of Japan (1), Kazakhstan (1), the Russian Federation (6), United States (7: Texas)

• Virgilian of Argentina (1)

• Pennsylvanian of United States (1: Iowa)

• Osagean of United States (2: Michigan, Ohio)

• Carboniferous of China (1), the Russian Federation (2), the United Kingdom (1), United States (27: Arizona, Colorado, Illinois, Indiana, Iowa, Kansas, Missouri, Montana, Nebraska, New Mexico, Ohio, South Dakota)

• Mississippian of the United Kingdom (1)

• Devonian of the Russian Federation (2), United States (4: Ohio)

Total: 60 collections including 71 occurrences

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