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| Teleostomes Temporal range: Ordovician – Present
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| an acanthodian | |
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| Four species of bony fish | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Eugnathostomata |
| Clade: | Teleostomi C. L. Bonaparte, 1836 |
| Subgroups | |
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Teleostomi (from Greek τελεος, complete + Greek στόμα, mouth) is an obsolete taxon[1] of jawed vertebrates that supposedly includes the tetrapods, bony fish, and the wholly extinct acanthodian fish. Key characters of this group include an operculum and a single pair of respiratory openings, features which were lost or modified in some later representatives. The teleostomes include all jawed vertebrates except the chondrichthyans and the extinct class Placodermi.
Recent studies indicate that Osteichthyes evolved from placoderms like Entelognathus, while acanthodians are more closely related to modern chondrichthyes. Teleostomi, therefore, is not a valid, natural clade, but a paraphyletic group of species.[1]
The clade Teleostomi should not be confused with the similar-sounding infraclass Teleostei.
- ^ a b Zhu M, Yu X, Ahlberg PE, Choo B, Lu J, Qiao T, Qu Q, Zhao W, Jia L, Blom H, Zhu Y (October 2013). "A Silurian placoderm with osteichthyan-like marginal jaw bones". Nature. 502 (7470): 188–93. Bibcode:2013Natur.502..188Z. doi:10.1038/nature12617. PMID 24067611. S2CID 4462506.