Diapsid - Wikipedia
Diapsids ("two arches") are a clade of sauropsids, distinguished from more primitive eureptiles by the presence of two holes, known as temporal fenestrae, in each side of their skulls. The earliest traditionally identified diapsids, the araeoscelidians, appeared about three hundred million years ago during the late Carboniferous period. [1]
A Triassic stem lepidosaur illuminates the origin of lizard-like ...
2021年8月25日 · The early evolution of diapsid reptiles is marked by a deep contrast between our knowledge of the origin and early evolution of archosauromorphs (crocodiles, avian and non-avian dinosaurs) to...
15.6: Evolution of Amniotes - Biology LibreTexts
2021年2月28日 · The early amniotes diverged into two main lines soon after the first amniotes arose. The initial split was into synapsids and sauropsids. Synapsids include all mammals, including extinct mammalian species. Synapsids also include therapsids, which were mammal-like reptiles from which mammals evolved.
The phylogeny of early amniotes and the affinities of Parareptilia …
2019年12月23日 · In the classical paradigm, synapsids, including mammals, have a single temporal opening, whereas crownward Reptilia, including most extant reptiles, have two openings (the ‘diapsid’ condition ...
Diapsid | reptile | Britannica
One of the most-recognizable groups of diapsids is the lepidosauromorphs. This lineage, which is ancestral to today’s tuatara and squamates (lizards and snakes), appeared first during the Late Permian. Assorted squamates or squamate relatives began appearing in the Jurassic Period (200 million to 146….
Evolutionary origin of the turtle skull | Nature
2015年9月2日 · The evolution of the early reptiles is a complicated story and one particular event — the inferred transformation between an ancestral turtle with a diapsid skull (with openings in the skull ...
Basal diapsids - University of California Museum of Paleontology
Diapsida. Diapsida includes two big, diverse clades, Lepidosauromorpha (animals that are closer to lizards and snakes) and Archosauromorpha (animals that are closer to crocs and birds). It also includes a whole host of other things that are probably diapsids but difficult to place precisely in the Tree of Life.
A new Early Permian reptile and its significance in early diapsid ...
2011年4月27日 · Two new reptile skulls from the Richards Spur locality, Lower Permian of Oklahoma, represent a new diapsid reptile: Orovenator mayorum n. gen. et sp. A phylogenetic analysis identifies O. mayorum as the oldest and most basal member of …
Palaeos Vertebrates Diapsida
However it is now known that some reptiles lost one or even both pairs of openings, so the presence or absence of this characteristic is not a completely reliable guide. The Diapsida are divided into two important groups, the lepidosaurs (Lepidosauromorpha) and the archosaurs (Archosauromorpha).
Diapsid - Simple English Wikipedia, the free encyclopedia
A diapsid is a reptile with two fenestrae (holes) behind the eye on each side of its skull. Most reptiles are diapsids, and the condition does not occur in mammals. The function of the holes is to improve jaw movements, and to reduce the weight of the skull.