Teleosteomorpha Temporal range: Middle Triassic–present PreꞒ Ꞓ O S D C P T J K Pg N
Thunnus maccoyii, a teleost
Vinctifer comptoni, an aspidorhynchiform
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Subclass:	Neopterygii
Infraclass:	Teleosteomorpha Arratia, 2001
Subdivisions
†Aspidorhynchiformes †Pachycormiformes †Pholidophoridae †Dorsetichthys †Leptolepidae †Ichthyodectiformes Teleostei (crown group) Others, see text

Teleosteomorpha is a clade of ray-finned fishes containing all teleost fish and their closest extinct relatives.^[1] Also in this group are two diverse Mesozoic fish orders, the Aspidorhynchiformes and the Pachycormiformes.^[2] Several other non-teleostomorph teleosteans existed throughout the Mesozoic, although not as dominant as the two main clades in the group.

Shared morphological features of this group include a autosphenotic bone lacking a dermal component, the lack of a canal bearing part of the antorbital bone, the lack of vertebral centra fused into the occipital condyle in adult individuals, and each hypural (caudal fin support) being articulated with caudal rays.^[3]

The oldest known teleosteomorph is Prohalecites from the Triassic of Italy.^[2] The last surviving non-teleostean teleosteomorph was Belonostomus, which survived into the Late Paleocene.

Taxonomy

Cladogram of Teleosteomorpha after Sferco et al. 2021:^[4]

The cladogram below is simplified after a phylogenetic analysis by Bean (2021).^[5]

Teleosteomorpha contains both the smallest (Paedocypris progenetica, above) and the largest (Leedsichthys problematicus, below) known ray-finned fish to have ever existed.

Where applicable, taxonomic order is based on the 5th edition of Fishes of the World:^[2]

• Infraclass Teleosteomorpha
  • Genus †Ruedersdorfia^[6]
  • Genus †Seinstedtia^[7]
  • Family †Atacamichthyidae
  • Family †Barschichthyidae^[6]
  • Family †Ichthyokentemidae
  • Family †Marcopoloichthyidae
  • Order †Prohaleciteiformes
  • Division †Aspidorhynchei (Early Jurassic to Paleocene, not always found to be monophyletic)
    • Order †Aspidorhynchiformes
    • Order †Pachycormiformes
  • Division Teleostei (Middle Triassic to present)
    • Family †Archaeomaenidae
    • Family †Koonwarriidae
    • Family †Luisiellidae
    • Family †Pleuropholidae
    • Family †Siyuichthyidae
    • Family †Varasichthyidae^[8]
    • Order †Ankylophoriformes
    • Order †?Araripichthyiformes
    • Order †Ascalaboidiformes
    • Order †Catervarioliformes
    • Order †?Ligulelliiformes
    • Order †Pholidophoriformes
    • Order †Dorsetichthyiformes
    • Order †Leptolepidiformes
    • Order †Ichthyodectiformes
    • Supercohort Teleocephala
      • Order †Crossognathiformes (excluding Varasichthyidae)^[8]
      • Cohort Elopomorpha
        • Order Elopiformes, including the ladyfishes and tarpon
        • Order Albuliformes, the bonefishes
        • Order Notacanthiformes, including the halosaurs and spiny eels
        • Order Anguilliformes, the true eels
      • Clade Osteoglossocephala
        • Cohort Osteoglossomorpha
          • Order †Lycopteriformes
          • Order Osteoglossiformes, the bony-tongued fishes
          • Order Hiodontiformes, including the mooneye and goldeye
        • Clade Clupeocephala
          • Family †Orthogonikleithridae
          • Order †Tselfatiiformes
          • Cohort Otocephala
            • Superorder Clupeomorpha
              • Order †Ellimmichthyiformes
              • Order Clupeiformes, including herrings and anchovies
            • Superorder Ostariophysi
              • Order †Sorbininardiformes
              • Order Gonorynchiformes, including the milkfishes
              • Order Cypriniformes, including barbs, carp, danios, goldfishes, loaches, minnows, rasboras
              • Order Characiformes, including characins, pencilfishes, hatchetfishes, piranhas, tetras.
              • Order Gymnotiformes, including electric eels and knifefishes
              • Order Siluriformes, the catfishes
          • Cohort Euteleostei
            • Order Lepidogalaxiiformes, the salamanderfish
            • Superorder Protacanthopterygii Zdroj:https://en.wikipedia.org?pojem=Aspidorhynchei
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