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Reptilia
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- Sauropsida (Greek for "lizard faces") is a clade of amniotes, broadly equivalent to the class Reptilia, though typically used in a broader sense to also include extinct stem-group relatives of modern reptiles and birds (which, as theropod dinosaurs, are nested within reptiles as more closely related to crocodilians than to lizards or turtles).
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Sauropsida (Greek for "lizard faces") is a clade of amniotes, broadly equivalent to the class Reptilia, though typically used in a broader sense to also include extinct stem-group relatives of modern reptiles and birds (which, as theropod dinosaurs, are nested within reptiles as more closely related to crocodilians than to lizards or turtles). [2]
The class Sauropsida includes vertebrates traditionally recognized as reptiles (such as turtles, lizards, snakes, mosasaurs, plesiosaurs, pterosaurs, and dinosaurs), as well as birds (which evolved from dinosaurs).
Sep 19, 2023 · Sauropsida is a diverse and ancient class of reptiles that includes turtles, lizards, snakes, crocodilians, and birds. These animals share several key characteristics, such as a bony skeleton, scales or feathers, and a three-chambered heart.
Michael Benton classifies all dinosaurs within the Series Amniota, Class Sauropsida, Subclass Diapsida, Infraclass Archosauromorpha, Division Archosauria, Subdivision Avemetatarsalia, Infradivision Ornithodira, and Superorder Dinosauria.
- Reptilia Or Sauropsida?
- So We Punt!
- Sauropsida
- Eureptilia
- Basal Eureptilia
- Diapsida
- Neoreptilia
- Parareptilia
- Sauria
Systematists were overconfident in the permanence of the phylogenetic hypotheses they developedAnd did not feel obliged to respect rules of priorityFor now and until a proper definition appears, the sister taxon of Synapsida will be referred to as Sauropsida, a name that is at leastfree of cultural association with traditional definitions of "reptiles."
We begin in the shadows. Recumbrostran "microsaurs" like Rhynchonkoswere covered in a previous lecture, along with concerns indicated in recent redescriptions that they are actually sauropsid amniotes. Evidence includes: 1. The presence of an unambiguous supraoccipital element in the braincase. (Ambiguous at best in other non-amniotes.) 2. Detailed...
Euraptilian synapomorphies include: 1. Suborbital opening (foramen (right) or fenestra) in palate beneath orbits. Compare with synapsids. 2. Single coronoid in jaw. (Linkto image.) 3. Tabularsreduced or absent 1. Color vision. 2. Dry aglandular skin with a new kind of scale made of keratin-B (mechanically similar to the keratin-A of your hair and f...
Includes Hylonomus lyelli, a Joggins tree-stump victim and the earliest well-known fossil amniote. Diversity:Neoreptilia comprises the majority of Eureptilia, but we should note some stem-neoreptilians. 1. Captorhinidae: (Late Carboniferous - Late Permian) Eureptiles characterized by adaptations to a strong, slow bite with trends toward rounded cru...
(Early Permian - recent) The last common ancestor of Parareptilia and Sauria and all of its descendants. Depending on where you place turtles, this couldalso be the diapsid crown-group. Synapomorphies: 1. Lacrimal excluded from margin of naris 2. Caniniform teeth (synapomorphy of Amniota) are lost
(Early Permian - Late Triassic) This group has historically included reptilian-grade organisms closer to Eureptilia that did not have living members. The arrival of phylogenetic systematics allowed it to be phylogenetically defined as monophyletic, however its precise membership has been fuzzy because of uncertainties about the position of turtles....
Here, for once, in a pleasing cladogram is the arrangement of Gauthier, 1984, in which two crown-groups were recognized in Sauria: 1. Archosauria: The most recent common ancestor of crocodylians and birds and all descendants. 2. Lepidosauria: The most recent common ancestor of squamates and Sphenodonand all descendants. 1. Archosauromorpha: All org...
Sep 13, 2002 · Sauropoda is among the most diverse and widespread dinosaurlineages, having attained a near-global distribution by the Middle Jurassic that was built on throughout the Cretaceous. These giganticherbivores are characterized by numerous skeletal specializationsthat accrued over a 140 million-year history.
Sep 1, 2023 · Sauropod dinosaurs such as Argentinosaurus evolved larger body sizes than any other group of terrestrial animals. Chase Stone. September 2023 Issue. Paleontology. Of all the animals ever to have...
