Reptiliomorpha and Sauropsida

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Difference between Reptiliomorpha and Sauropsida

Reptiliomorpha vs. Sauropsida

Reptiliomorpha is a clade containing the amniotes and those tetrapods that share a more recent common ancestor with amniotes than with living amphibians (lissamphibians). Sauropsida ("lizard faces") is a group of amniotes that includes all existing birds and other reptiles as well as their fossil ancestors and other extinct relatives.

Alfred Romer

Alfred Sherwood Romer (December 28, 1894 – November 5, 1973) was an American paleontologist and biologist and a specialist in vertebrate evolution.

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Amniote

Amniotes (from Greek ἀμνίον amnion, "membrane surrounding the fetus", earlier "bowl in which the blood of sacrificed animals was caught", from ἀμνός amnos, "lamb") are a clade of tetrapod vertebrates comprising the reptiles, birds, and mammals.

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Amphibian

Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia.

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Captorhinidae

Captorhinidae (also known as cotylosaurs) is one of the earliest and most basal reptile families, all members of which are extinct.

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Clade

A clade (from κλάδος, klados, "branch"), also known as monophyletic group, is a group of organisms that consists of a common ancestor and all its lineal descendants, and represents a single "branch" on the "tree of life".

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Eureptilia

Eureptilia ("true reptiles") is one of the two major clades of the Sauropsida, the other being Parareptilia.

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Evolutionary grade

In alpha taxonomy, a grade is a taxon united by a level of morphological or physiological complexity.

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Holocene

The Holocene is the current geological epoch.

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Lizard

Lizards are a widespread group of squamate reptiles, with over 6,000 species, ranging across all continents except Antarctica, as well as most oceanic island chains.

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Parareptilia

Parareptilia ("at the side of reptiles") is a subclass or clade of reptiles which is variously defined as an extinct group of primitive anapsids, or a more cladistically correct alternative to Anapsida.

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Permian

The Permian is a geologic period and system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic period 251.902 Mya.

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Phylogenetic nomenclature

Phylogenetic nomenclature, often called cladistic nomenclature, is a method of nomenclature for taxa in biology that uses phylogenetic definitions for taxon names as explained below.

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Procolophonia

The Procolophonia are a suborder of herbivorous reptiles that lived from the Middle Permian till the end of the Triassic period.

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Reptile

Reptiles are tetrapod animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives.

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Synapsid

Synapsids (Greek, 'fused arch'), synonymous with theropsids (Greek, 'beast-face'), are a group of animals that includes mammals and every animal more closely related to mammals than to other living amniotes.

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Tree of Life Web Project

The Tree of Life Web Project is an Internet project providing information about the diversity and phylogeny of life on Earth.

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Turtle

Turtles are diapsids of the order Testudines (or Chelonii) characterized by a special bony or cartilaginous shell developed from their ribs and acting as a shield.

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