†suborder Semionotoidei (ray-finned fish)

Actinopteri - Semionotiformes

Parent taxon: Semionotiformes according to J. T. Thurmond and D. E. Jones 1981

Sister taxa: Alleiolepis, Allelepidotus, Aphelolepis, Austrolepidotus, Callipurbeckiidae, Callopteus, Corunegenys, Enigmatichthys, Heterostrophus, Macrosemiidae, Orthurus, Pericentrophorus, Plesiolepidotus, Prionopleurus, Semionotidae, Serrolepis, Sinosemionotus, Sphathiurus, Tungusichthyidae

Subtaxa: Hadrodontidae

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Ecology: nektonic durophage-carnivore

Distribution:

• Eocene of Pakistan (2 collections)

• Cretaceous to Paleogene of United States (1: Arkansas)

• Cretaceous of United States (3: Alabama, Kansas, Maryland)

Total: 6 collections each including a single occurrence

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