| Crossognathiformes Temporal range:
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|---|---|
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| Rhacolepis fossil | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Division: | Teleostei |
| Order: | †Crossognathiformes Taverne, 1989 |
| Type genus | |
| †Crossognathus Pictet, 1858
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| Subgroups | |
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See text | |
Crossognathiformes is an extinct order of ray-finned fish that lived from the Late Jurassic to the Eocene. Its phylogenetic placement is disputed; some authors have recovered it as part of the teleost stem group,[1] while others place it in a basal position within crown group Teleostei.[2] Other placements have found it to be polyphyletic, with Varasichthyidae being stem-group teleosts whereas the other, "true" crossognathiforms are crown-group teleosts within Teleocephala.[2]
The oldest definitive crossognathiforms are known from the Late Jurassic (Oxfordian) of Chile. They diversified afterwards and became a dominant group of marine fish throughout much of the Cretaceous. The last surviving member was the pachyrhizodontid Platinx from the Early Eocene of Monte Bolca, Italy.[3]
- ^ Cite error: The named reference
Nelsonwas invoked but never defined (see the help page). - ^ a b Sferco, E.; López-Arbarello, A.; Báez, A. M. (2015). "Phylogenetic relationships of †Luisiella feruglioi (Bordas) and the recognition of a new clade of freshwater teleosts from the Jurassic of Gondwana". BMC Evolutionary Biology. 15 (1): 268. doi:10.1186/s12862-015-0551-6. PMC 4668602. PMID 26630925.
- ^ Arratia, Gloria; Tischlinger, Helmut (2010-08-05). "The first record of Late Jurassic crossognathiform fishes from Europe and their phylogenetic importance for teleostean phylogeny". Fossil Record. 13 (2): 317–341. doi:10.1002/mmng.201000005.