Captorhinida

Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Cladus: Reptiliomorpha
Cladus: Amniota
Classis: Reptilia
Informal group: †Captorhinida
Familia: Bolosauridae - Captorhinidae - Millerettidae - Protorothyrididae
Name

Captorhinida Case, 1911
Synonyms

Romeriidae Price, 1937

Vernacular names
中文: 大鼻龍科,狹鼻龍科

Captorhinida (older name: Cotylosauria) is a doubly paraphyletic grouping of early reptiles. Robert L. Carroll (1988) ranked it as an order in the subclass Anapsida, composed of the following suborders:[1]

A paraphyletic Captorhinomorpha, containing the families Protorothyrididae, Captorhinidae, Bolosauridae, Acleistorhinidae and possibly also Batropetidae
Procolophonia, containing families Nyctiphruretidae, Procolophonidae and Sclerosauridae
Pareiasauroidea, with families Rhipaeosauridae and Pareiasauridae
Millerosauroidea, with a single family Millerettidae.

While they all share primitive features and resemble the ancestors of all modern reptiles, some of these families are more closely related to (or belong to) the clade Parareptilia, while others are further along the line leading to diapsids. For this reason, the group is only used informally, if at all, by most modern paleontologists. All members of this group are thought to be extinct.
References

R. L. Carroll (1988), Vertebrate Paleontology and Evolution, W. H. Freeman and Company, New York