Physonemus Agassiz 1843 (elasmobranch)

Chondrichthyes

Alternative spelling: Onchus (Physonemus)

Synonyms: Batacanthus St John and Worthen 1870, Drepanacanthus Newberry and Worthen 1866, Gnathacanthus Davis 1883, Xystracanthus Leidy 1859

Full reference: L. Agassiz. 1843. Recherches Sur Les Poissons Fossiles. Tome I (18me livraison) xxxii-188

Parent taxon: Elasmobranchii according to D. K. Elliot et al. 2004

See also Branson 1916, Eastman 1903, Hay 1902, Jordan 1963, Leidy 1873, Lund 1985, Maisey 1983, Nassichuk 1971, Waagen 1879 and Zidek 1976

Sister taxa: Amelacanthus, Annulicorona, Antarctilamniformes, Aporomicrodus, Arduodens, Carcharopsis, Carinasubcorona, Celtiberina, Cestraciontidae, Changxingselache, Cladodontomorphi, Cladodontomorphii, Cladodus hassiacus, Cladodus wildungensis, Cladoselachida, Cladoselachii, Complanicorona, Coniunctio, Coronodontida, Eunemacanthus, Euselachiformes, Euselachii, Fragilicorona, Galeiformes, Glabrisubcorona, Gondwanodus, Ichthyodorulites, Kannathalepididae, Labascicorona, Labrilancea, Leonodus, Lesnilomia, Listracanthidae, Lobaticorona, Meishanselache, Minuticorona, Myliobatiformes, Omalodontiformes, Oniscina, Ornathiliabrilance, Ornatilabrilancea, Orodontida, Osteodonti, Parvicorona, Parvidiabolus, Parviscapha, Phoebodontiformes, Plagiostomi, Platylithophycus, Pleuracanthidae, Pleuracanthodii, Pristiorajea, Proselachii, Protodontidae, Raineria, Rosaodus, Rugosicorona, Sacrisubcorona, Selachii, Selachimorpha, Serratocorona, Siamodus, Suaviloquentia, Undulaticorona, Xenacanthida, Xenacanthimorpha

Subtaxa: Batacanthus baculiformis Batacanthus necis Batacanthus stellatus Gnathacanthus striatus Gnathacanthus triangularis Physonemus arcuatus Physonemus asper Physonemus carinatus Physonemus gemmatus Physonemus gigas Physonemus gigii Physonemus hamuspiscatorius Physonemus mirabilis Physonemus pandatus Physonemus stellatus Physonemus striatus Physonemus subteres Xystracanthus acinaciformis Xystracanthus anceps Xystracanthus giganteus Xystracanthus gracilis Xystracanthus major Xystracanthus mirabilis Xystracanthus reversus

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Type: Physonemus arcuatus

Ecology: nektonic carnivore

Distribution:

• Permian of Canada (1: Nunavut collection), Pakistan (4), United States (2: Kansas, Wyoming)

• Carboniferous of United States (8: Arizona, Colorado, Iowa, Kansas, Ohio, West Virginia)

• Mississippian of the United Kingdom (2)

Total: 17 collections including 21 occurrences

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