Diapsids ("two arches") are a clade of sauropsids, distinguished from more primitive eureptiles by the presence of two holes, known as temporal fenestrae...

synapsids (mammals and their extinct relatives) there is one, and most diapsids (including birds, crocodilians, squamates, and tuataras), have two. Turtles...

though not diapsids in a purely anatomical sense, qualify as members of the clade Diapsida due to their likely diapsid ancestry. Some diapsids, particularly...

thus defining Reptilia as a more restricted crown group encompassing diapsids and parareptiles (apart from mesosaurs, which he considered to be the most...

Archosauria (lit. 'ruling reptiles') or archosaurs (/ˈɑːrkəˌsɔːr/) is a clade of diapsid sauropsid tetrapods, with birds and crocodilians being the only extant...

as diapsids, dinosaurs ancestrally had two pairs of Infratemporal fenestrae (openings in the skull behind the eyes), and as members of the diapsid group...

reassignment of synapsids as non-reptiles, and classification of turtles as diapsids. Gauthier 1994 and Laurin and Reisz 1995's definition of Sauropsida defined...

goniatites), and orthoceridans all abundant. Crown reptiles arise from earlier diapsids, and split into the ancestors of lepidosaurs, kuehneosaurids, choristoderes...

Araeoscelida is a clade of extinct amniotes (traditionally classified as diapsid reptiles) superficially resembling lizards, extending from the Late Carboniferous...

"anapsid" clade. Analysis of fossil data has shown that turtles are likely diapsid reptiles, most closely related either to the archosaurs (crocodiles, bird...

Petrolacosaurus ("rock lake lizard") is an extinct genus of diapsid reptile from the late Carboniferous period. It was a small, 40-centimetre (16 in)...

for theropod dinosaurs, is rare among vertebrates in general, and modern diapsid carnivores (including lizards, crocodiles, and birds) rarely cooperate...

modern paleontologists believe that the Testudines are descended from diapsid reptiles that lost their temporal fenestrae. More recent morphological...

found turtles to either be descendants of parareptiles, early-diverging diapsids outside of Sauria, or close relatives of lepidosaurs within the clade Ankylopoda...

archosauromorphs, lepidosauromorphs related to kuehneosaurids, non-saurian diapsids related to weigeltisaurids, or (most recently) basal neodiapsids. When...

Archosauromorpha (Greek for "ruling lizard forms") is a clade of diapsid reptiles containing all reptiles more closely related to archosaurs (such as...

synapsid amniotes were dominant during the late Paleozoic, the Permian, while diapsid amniotes became dominant during the Mesozoic. In the sea, the teleosts...

bones at the back of the skull. While all but the earliest eureptiles were diapsids, with two openings at the back of the skull, parareptiles were generally...

Scotia, and possibly New Brunswick. Petrolacosaurus, the earliest known diapsid reptile, lived during the late Carboniferous. Archaeothyris is the oldest...

Captorhinidae and Protorothyrididae (extinct) Diapsids...

Avemetatarsalia (meaning "bird metatarsals") is a clade of diapsid reptiles containing all archosaurs more closely related to birds than to crocodilians...

Sauria is the clade of diapsids containing the most recent common ancestor of Archosauria (which includes crocodilians and birds) and Lepidosauria (which...

ISSN 0311-5518. S2CID 131795055. Rieppel, Olivier; DeBraga, M. (1996). "Turtles as Diapsid Reptiles" (PDF). Nature. 384 (6608): 453–455. Bibcode:1996Natur.384..453R...

Color. New York: Sterling Publishers. ISBN 0-8069-6460-X. Sanchez A. "Diapsids III: Snakes". Father Sanchez's Web Site of West Indian Natural History...

attachment sites for jaw muscles. A similar development took place in the diapsids, which evolved two rather than one opening behind each eye. Originally...

archosaurs continued to dominate aquatic environments, while non-archosaurian diapsids continued to dominate marine environments. The Temnospondyl lineage of...

mammals) and the diapsids (the line leading to crocodiles, birds and other dinosaurs, tuatara, lizards, and snakes). The synapsids and the diapsids diverged about...

America. Towards the end of the era, large, sophisticated synapsids and diapsids were dominant and the first modern plants (conifers) appeared. The Paleozoic...

located higher on the skull. The function of the holes in both synapsids and diapsids was to lighten the skull and give room for the jaw muscles to move, allowing...

19th century paleontologist Gideon Mantell who viewed it as dominated by diapsids such as Iguanodon, Megalosaurus, Plesiosaurus, and Pterodactylus. The current...