| Neosteneosaurus Temporal range: Callovian-Oxfordian ~165–158 Ma PreꞒ Ꞓ O S D C P T J K Pg N | |
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| Holotype and assigned specimen | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Archosauria |
| Clade: | Pseudosuchia |
| Clade: | Crocodylomorpha |
| Clade: | Crocodyliformes |
| Suborder: | †Thalattosuchia |
| Family: | †Machimosauridae |
| Subfamily: | †Machimosaurinae |
| Genus: | †Neosteneosaurus Johnson et al., 2020 |
| Species: | †N. edwardsi |
| Binomial name | |
| †Neosteneosaurus edwardsi (Eudes-Deslongchamps, 1868) | |
| Synonyms | |
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Neosteneosaurus is a genus of machimosaurid, known from the Middle Jurassic Oxford Clay of the UK, and Marnes de Dives, France. The type species, N. edwardsi, was originally named as a species of Steneosaurus in 1868, but was moved to its own genus in 2020. Steneosaurus durobrivensis and Steneosaurus hulkei are considered junior synonyms.
In 2015, it was estimated at more than 7 m (23 ft) in length. In 2016, this estimate was revised down to 6.6 m (22 ft), but even with such measurement, this animal remains to be the largest known Middle Jurassic crocodylomorph.
References
- Eudes-Deslongchamps E. 1867-1869. Notes Paléontologiques. Caen and Paris: 320-392.
- Johnson, Michela M.; Young, Mark T.; Brusatte, Stephen L. (2020). "The phylogenetics of Teleosauroidea (Crocodylomorpha, Thalattosuchia) and implications for their ecology and evolution". PeerJ. 8: e9808. doi:10.7717/peerj.9808. PMC 7548081. PMID 33083104.
- Michela M Johnson, Mark Thomas Young, Lorna Steel, Yves Lepage (July 2015). "Steneosaurus edwardsi (Thalattosuchia: Teleosauridae), the largest known crocodylomorph of the Middle Jurassic". Biological Journal of the Linnean Society. 115 (4): 911–918. doi:10.1111/bij.12525.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - Young, MT; Rabi, M.; Bell, MA; Foffa, D.; Steel, L.; Sachs, S.; Peyer, K. (2016). "Big-headed marine crocodyliforms and why we must be cautious when using extant species as body length proxies for long-extinct relatives". Palaeontologia Electronica. 19 (3): 1–14. doi:10.26879/648.
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