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Millerosauria

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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. 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. In 2025,

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Within Vinony's link graph, Millerosauria is referenced by 100 other articles, and connects out to Sauropsida, Pareiasauria and Diapsid.

It is catalogued under topics including Guadalupian first appearances, Lopingian extinctions and Parareptilia.

Its subject is documented across 5 Wikipedia language editions.

Wikidata facts

Instance of
taxon
Parent taxon
Parareptilia
Image
Milleretta BW.jpg
Show 4 more facts
taxon name
Millerosauria
taxon rank
order
start time
265800000-
end time
251000000-
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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. 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. In 2025, Jenkins et al. recovered the subgroup Millerettidae close to Neodiapsida as the earliest-diverging group in the clade Parapleurota.

Eunotosaurus has been recovered as a stem-turtle in some cladistic studies.

Excerpted from Wikipedia’s “Millerosauria” article, available under the CC BY-SA 4.0 licence.

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