| Mystriosaurus Temporal range: Early Jurassic
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|---|---|
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| Assigned specimen (holotype of the junior synonym Steneosaurus brevior) | |
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: | †Teleosauridae |
| Genus: | †Mystriosaurus Kaup, 1834 |
| Species: | †M. laurillardi
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| Binomial name | |
| †Mystriosaurus laurillardi Kaup, 1834
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| Synonyms | |
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†"Steneosaurus" brevior Blake, 1876
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Mystriosaurus is an extinct genus of teleosaurid crocodyliform from the Early Jurassic (Toarcian). Fossil specimens have been found in the Whitby Mudstone of England and Posidonia Shale of Germany. The only known species, M. laurillardi, exceeded 4 metres (13 ft) in length.[1]
A 2019 phylogenetic analysis found Mystriosaurus to be distinct from Steneosaurus.[2]
- ^ "Sachs_Mystiosaurus". Sachs. Retrieved 2011-09-12.
- ^ Sachs, S.; Johnson, M.M.; Young, M.T.; Abel, P. (2019). "The mystery of Mystriosaurus: Redescribing the poorly known Early Jurassic teleosauroid thalattosuchians Mystriosaurus laurillardi and Steneosaurus brevior" (PDF). Acta Palaeontologica Polonica. 64 (3): 565–579. doi:10.4202/app.00557.2018.