71 relations: Alfred Romer, Amniote, Anapsid, Araeoscelidia, Archosauriformes, Archosauromorpha, Asselian, Axel Meyer, Bradysaurus, Captorhinida, Captorhinidae, Choristodera, Clade, Cladistics, Cladogram, Claudiosaurus, Diapsid, Eunotosaurus, Eureptilia, Everett C. Olson, Field Museum of Natural History, Hallucicrania, Jacques Gauthier, Journal of Vertebrate Paleontology, Lanthanosuchoidea, Lepidosauromorpha, Mesosaur, Michel Laurin, Millerettidae, Millerosauria, Molecular Biology and Evolution, Molecular phylogenetics, Molecular Phylogenetics and Evolution, Nature (journal), Neodiapsida, Odontochelys, Oxford University Press, Paleothyris, Paleozoic, Paraphyly, Parareptilia, Pareiasaur, Pareiasauromorpha, Permian, Phylogenetic tree, Placodont, Proceedings of the National Academy of Sciences of the United States of America, Procolophonia, Procolophonidae, Procolophonoidea, ..., Procolophonomorpha, Proganochelys, Protorothyrididae, Reptile, Rhaetian, Rhynchosaur, Robert R. Reisz, Romeriida, Sauropsida, Sauropterygia, Sinosaurosphargis, Synapsid, Taxon, Tree of Life Web Project, Triassic, Trilophosaurus, Turtle, Vertebrate Palaeontology (Benton), Vertebrate Paleontology (Romer), Younginiformes, Zoological Journal of the Linnean Society. Expand index (21 more) » « Shrink index
Alfred Sherwood Romer (December 28, 1894 – November 5, 1973) was an American paleontologist and biologist and a specialist in vertebrate evolution.
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.
An anapsid is an amniote whose skull does not have openings near the temples.
Araeoscelidia or Araeoscelida is a clade of extinct diapsid reptiles superficially resembling lizards, extending from the Late Carboniferous to the Early Permian.
Archosauriformes (Greek for 'ruling lizards', and Latin for 'form') is a clade of diapsid reptiles that developed from archosauromorph ancestors some time in the Late Permian (roughly 250 million years ago).
Archosauromorpha (Greek for "ruling lizard forms") is a clade (or infraclass) of diapsid reptiles that first appeared during the middle Permian and became more common during the Triassic.
In the geologic timescale, the Asselian is the earliest geochronologic age or lowermost chronostratigraphic stage of the Permian.
Axel Meyer (born August 4, 1960) is an evolutionary biologist and a professor of zoology and evolutionary biology at the Universität Konstanz, Germany.
Bradysaurus was a large, early and common pareiasaur, the fossils of which are known from the Tapinocephalus Assemblage Zone (Capitanian age) of the South African Karoo.
Labidosaurus hamatus'' Captorhinida (older name: Cotylosauria) is a doubly paraphyletic grouping of early reptiles.
Captorhinidae (also known as cotylosaurs) is one of the earliest and most basal reptile families, all members of which are extinct.
Choristodera is an extinct order of semiaquatic diapsid reptiles that ranged from the Middle Jurassic, or possibly Late Triassic, to at least the early Miocene.
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".
Cladistics (from Greek κλάδος, cládos, i.e., "branch") is an approach to biological classification in which organisms are categorized in groups ("clades") based on the most recent common ancestor.
A cladogram (from Greek clados "branch" and gramma "character") is a diagram used in cladistics to show relations among organisms.
Claudiosaurus is an extinct genus of diapsid reptile from the Permian period of Madagascar.
Diapsids ("two arches") are a group of amniote tetrapods that developed two holes (temporal fenestra) in each side of their skulls about 300 million years ago during the late Carboniferous period.
Eunotosaurus is an extinct genus of reptile, possibly a close relative of turtles, from the late Middle Permian (Capitanian stage) Karoo Supergroup of South Africa.
Eureptilia ("true reptiles") is one of the two major clades of the Sauropsida, the other being Parareptilia.
Everett Claire Olson (November 6, 1910 – November 27, 1993) was an American zoologist, paleontologist, and geologist noted for his seminal research of origin and evolution of vertebrate animals.
The Field Museum of Natural History, also known as The Field Museum, is a natural history museum in the city of Chicago, and is one of the largest such museums in the world.
Hallucicrania is an extinct clade of procolophonomorph parareptiles from the early Cisuralian epoch (middle Sakmarian stage) to the latest Triassic period (latest Rhaetian stage) of Africa, Antarctica, Asia, Australia, Europe, North America and South America.
Jacques Armand Gauthier (born June 7, 1948 in New York City) is an American vertebrate paleontologist, comparative morphologist, and systematist, and one of the founders of the use of cladistics in biology.
The Journal of Vertebrate Paleontology (JVP) was founded in 1980 at the University of Oklahoma by Dr.
Lanthanosuchoidea is an extinct superfamily of ankyramorph parareptiles from the late Cisuralian to the middle Guadalupian epochs (Artinskian - Wordian stages) of Europe, North America and Asia.
Lepidosauromorpha is a group of reptiles comprising all diapsids closer to lizards than to archosaurs (which include crocodiles and birds).
Mesosaurs ("middle lizards") were a group of small aquatic reptiles that lived during the early Permian period, roughly 299 to 270 million years ago.
Michel Laurin is a vertebrate paleontologist whose specialties include the emergence of a land-based lifestyle among vertebrates, the evolution of body size, and the origin and phylogeny of lissamphibians.
Millerettidae is an extinct family of parareptiles from the Middle Permian to the Late Permian period (Capitanian - Changhsingian stages) of South Africa.
Millerosauria is an order of Parareptiles that contains the families †Millerettidae and †Eunotosauridae.
Molecular Biology and Evolution is a monthly peer-reviewed scientific journal published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.
Molecular phylogenetics is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominately in DNA sequences, to gain information on an organism's evolutionary relationships.
Molecular Phylogenetics and Evolution is a peer-reviewed scientific journal of evolutionary biology and phylogenetics.
Nature is a British multidisciplinary scientific journal, first published on 4 November 1869.
Neodiapsida is a clade, or major branch, of the reptilian family tree and includes all diapsids apart from some early primitive types known as the araeoscelidians.
Odontochelys semitestacea (meaning "toothed turtle with a half-shell") is a Late Triassic relative of turtles.
Oxford University Press (OUP) is the largest university press in the world, and the second oldest after Cambridge University Press.
Paleothyris was a small, agile, anapsid romeriidan reptile which lived in the Middle Pennsylvanian epoch in Nova Scotia (approximately 312 to 304 million years ago).
The Paleozoic (or Palaeozoic) Era (from the Greek palaios (παλαιός), "old" and zoe (ζωή), "life", meaning "ancient life") is the earliest of three geologic eras of the Phanerozoic Eon.
In taxonomy, a group is paraphyletic if it consists of the group's last common ancestor and all descendants of that ancestor excluding a few—typically only one or two—monophyletic subgroups.
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.
Pareiasaurs (meaning "cheek lizards") are an extinct group of anapsid reptiles classified in the family Pareiasauridae.
Pareiasauromorpha is a group of parareptilian amniotes from the 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.
A phylogenetic tree or evolutionary tree is a branching diagram or "tree" showing the evolutionary relationships among various biological species or other entities—their phylogeny—based upon similarities and differences in their physical or genetic characteristics.
Placodonts ("Tablet teeth") is an extinct order of marine reptiles that lived during the Triassic period, becoming extinct at the end of the period.
Proceedings of the National Academy of Sciences of the United States of America (PNAS) is the official scientific journal of the National Academy of Sciences, published since 1915.
The Procolophonia are a suborder of herbivorous reptiles that lived from the Middle Permian till the end of the Triassic period.
Procolophonidae is an extinct family of parareptiles from the Permian and Triassic periods.
Procolophonoidea is an extinct superfamily of procolophonian parareptiles.
Procolophonomorpha is an order or clade of early reptiles that appeared during the Middle Permian.
Proganochelys quenstedti, identified as a primitive turtle, is an extinct genus that has been hypothesized to be the sister taxon to all other turtles creating a monophyletic group, the Casichelydia.
Protorothyrididae is an extinct family of small, lizard-like reptiles.
Reptiles are tetrapod animals in the class Reptilia, comprising today's turtles, crocodilians, snakes, amphisbaenians, lizards, tuatara, and their extinct relatives.
The Rhaetian is, in geochronology, the latest age of the Triassic period or in chronostratigraphy the uppermost stage of the Triassic system.
Rhynchosaurs were a group of Triassic diapsid reptiles related to the archosaurs.
Robert Rafael Reisz is a Canadian paleontologist and specialist in the study of early amniote and tetrapod evolution.
Romeriida is a clade of reptiles that consists of diapsids and the extinct protorothyridid genus Paleothyris, if not the entire family Protorothyrididae.
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.
Sauropterygia ("lizard flippers") is an extinct, diverse taxon of aquatic reptiles that developed from terrestrial ancestors soon after the end-Permian extinction and flourished during the Mesozoic before they became extinct at the end of that era.
Sinosaurosphargis is an extinct genus of basal marine saurosphargid reptile known from the Middle Triassic (Anisian age) Guanling Formation of Yunnan and Guizhou Provinces, southwestern China.
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.
In biology, a taxon (plural taxa; back-formation from taxonomy) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit.
The Tree of Life Web Project is an Internet project providing information about the diversity and phylogeny of life on Earth.
The Triassic is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.9 million years ago (Mya), to the beginning of the Jurassic Period Mya.
Trilophosaurus (Greek for "lizard with three ridges") is a lizard-like trilophosaurid allokotosaur known from the Late Triassic of North America.
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.
Vertebrate Palaeontology is a basic textbook on vertebrate paleontology by Michael J. Benton, published by Blackwell's.
Vertebrate Paleontology is an advanced textbook on vertebrate paleontology by Alfred Sherwood Romer, published by the University of Chicago Press.
Younginiformes is a replacement name for the taxon Eosuchia, proposed by Alfred Romer in 1947.
The Zoological Journal of the Linnean Society is a monthly peer-reviewed scientific journal of zoology published by Oxford University Press on behalf of the Linnean Society.