Protorothyrididae Fossil range: Late Carboniferous-Early Permian
Hylonomus
Scientific classification
Class	Sauropsida/Anapsida?
Order	Captorhinida
Suborder	Captorhinomorpha
Family	Protorothyrididae
Genera	Anthracodromeus Archerpeton Brouffia Coelostegus Hylonomus Paleothyris Protorothyris

Protorothyrididae was a family of small, lizard-like reptiles, possibly the ancestors of turtles and tortoises. Their skulls did not have fenestrae, as is also true of modern turtles and tortoises. Protorothyridids lived from the Late Carboniferous to Early Permian periods, in what is now North America and Europe. One member of this family is Hylonomus from the early Late Carboniferous, so far the earliest confirmed reptile.

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