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,[1] but was moved to its own genus in 2020. Steneosaurus durobrivensis and Steneosaurus hulkei are considered junior synonyms.[2]
| Neosteneosaurus | |
|---|---|
| |
| 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
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| Binomial name | |
| †Neosteneosaurus edwardsi (Eudes-Deslongchamps, 1868)
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| Synonyms | |
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In 2015, it was estimated at more than 7 m (23 ft) in length.[3] 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.[4]
References
edit- ^ 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.