| Millerosauria Temporal range: Middle to Late Permian, | |
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| Reconstructed skull of Milleretta | |
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| Fossil of Eunotosaurus | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Subclass: | † Parareptilia |
| Order: | † Millerosauria Watson, 1957 |
| Families | |
| Synonyms | |
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Millerosauria is a proposed extinct order of early reptiles that contains the families Millerettidae and Eunotosauridae. It was named in 1957 by Watson and represents a group of reptiles that were thought to be ancestral to Eosuchia (a now-defunct clade roughly corresponding to the non-saurian Neodiapsida) and modern reptiles. [1] Many cladistic studies have interpreted members of the Millerosauria as an early-diverging group of 'parareptiles', but some phylogenetic analyses have demonstrated that 'Parareptilia' represents a group of unrelated early reptiles and is therefore polyphyletic. [2] [3] In 2025, Jenkins et al. recovered the subgroup Millerettidae close to Neodiapsida as the earliest-diverging group in the clade Parapleurota. [4]
Eunotosaurus has been recovered as a stem-turtle in some cladistic studies. [5]
