Neosteneosaurus Explained

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]

In 2015, it was estimated at more than in length.[3] In 2016, this estimate was revised down to, but even with such measurement, this animal remains to be the largest known Middle Jurassic crocodylomorph.[4]

Notes and References

  1. Eudes-Deslongchamps E. 1867-1869. Notes Paléontologiques. Caen and Paris: 320-392.
  2. Johnson . Michela M. . Young . Mark T. . Brusatte . Stephen L. . The phylogenetics of Teleosauroidea (Crocodylomorpha, Thalattosuchia) and implications for their ecology and evolution . PeerJ . 2020 . 8 . e9808 . 10.7717/peerj.9808. 33083104 . 7548081 . free .
  3. Michela M Johnson, Mark Thomas Young, Lorna Steel, Yves Lepage. Steneosaurus edwardsi (Thalattosuchia: Teleosauridae), the largest known crocodylomorph of the Middle Jurassic. Biological Journal of the Linnean Society. July 2015. 115. 4. 911–918. 10.1111/bij.12525. free.
  4. Big-headed marine crocodyliforms and why we must be cautious when using extant species as body length proxies for long-extinct relatives. 10.26879/648. 2016. Young. MT. Rabi. M.. Bell. MA. Foffa. D.. Steel. L.. Sachs. S.. Peyer. K.. Palaeontologia Electronica. 19. 3. 1–14. free.

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