Neosteneosaurus

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 Temporal range: Callovian-Oxfordian ~165–158 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Holotype and assigned specimen
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Archosauria
Clade:	Pseudosuchia
Clade:	Crocodylomorpha
Suborder:	†Thalattosuchia
Family:	†Machimosauridae
Subfamily:	†Machimosaurinae
Genus:	†Neosteneosaurus Johnson et al., 2020
Species:	†N. edwardsi
Binomial name
†Neosteneosaurus edwardsi (Eudes-Deslongchamps, 1868)
Synonyms
Steneosaurus dubroviensis Steneosaurus edwardsi Eudes-Deslongchamps, 1868 Steneosaurus hulkei Andrews, 1913

Skeleton at Peterborough Museum

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]