Infraclassis: Holostei
Division: Ginglymodi
Ordo: †Semionotiformes
Familia: †Semionotidae

Genus: †Semionotus

formerly these genera were also placed in Semionotidae. Placement is in process for wikispecies:

Genera: †Acentrophorus – †Adrianaichthys – †Aetheolepis – †Allolepidotus – †Aphnelepis – †Archaeolepidotus – †Archaeosemionotus – †Asialepidotus – †Dandya – †Hemicalypterus – †Pliodetes – †Pristisomus – †Sargodon – †Tetragonolepis – †Tianfuichthys

Name

Semionotidae Woodward, 1890

• Type genus: †Semionotus Agassiz, 1832

References

• López-Arbarello, A. 2012. Phylogenetic Interrelationships of Ginglymodian Fishes (Actinopterygii: Neopterygii). PLoS ONE 7(7): e39370. DOI: 10.1371/journal.pone.0039370 Reference page. 
• Olsen, P.E. & McCune, A.R. 1991. Morphology of the Semionotus elegans species group from the early Jurassic part of the Newark Supergroup of eastern North America with comments on the family Semionotidae (Neopterygii). Journal of Vertebrate Paleontology 11: 269–292. Reference page. 
• Wenz, S. 1999. Pliodetes nigeriensis, gen. nov. et sp. nov., a new semiontid fish from the Lower Cretaceous of Gadoufaoua (Niger Republic): phylogenetic comments. Pp. 107-120 in Arratia, G. & Schultze, H.-P. (eds.): Mesozoic fishes – 2, Systematics and the fossil record. Dr. Friedrich Pfeil, München. Reference page. 
• Woodward, A.S. 1890. The fossils fishes of the Hawkesbury Series at Gosford. Memoires of the Geological Survey of New South Wales (Palaeontological Series) 4: 1–56. Reference page.