Information about Ornithodira
| Ornithodirans Fossil range: Middle Triassic - Recent | ||||||||||||||
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) Scleromochlus, a basal ornithodiran Scleromochlus, a basal ornithodiran | ||||||||||||||
| Scientific classification | ||||||||||||||
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| Clades | ||||||||||||||
Ornithodira is a clade within the larger group Archosauria. Another name for this group is Avemetatarsalia. Members of this clade are characterized by an upright gait and an S-curved neck, hence the name "Ornithodira" ("bird neck"). It contains two sub-clades, Dinosauromorpha and Pterosauromorpha.
Dinosauromorpha contains the lagosuchians, and their famous descendants, the dinosaurs, some of which (specifically theropods) are considered by most modern scientists to be ancestors of modern birds.
Pterosauromorpha contains Pterosauria, which are the famous flying reptiles, and perhaps the first vertebrates capable of true flight. Most researchers think pterosaurians had neither an S-curved neck, nor an upright gait. However, the Ornithodira clade is still valid because it is defined as the last common ancestor of the dinosaurs and the pterosaurs, and all its descendants.
Phylogeny
Cladogram after Ezcurra (2006):OrnithodiraPterosauromorpha | | | `--Pterosauria `--DinosauromorphaLagerpeton `--DinosauriformesMarasuchus `--+--Pseudolagosuchus `--+--Silesaurus `--+--Eucoelophysis `--DinosauriaSaurischia | |--Herrerasauridae | `--Eusaurischia | |--Theropoda | `--Sauropodomorpha `--Ornithischia
The Middle Triassic (also known as Muschelkalk) is the second of three epochs of the Triassic period. It spans the time between 245 ± 1.5 Ma and 228 ± 2 Ma (million years ago). The Middle Triassic is divided into the Anisian and Ladinian faunal stages.
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Scleromochlus
Binomial name
Scleromochlus taylori
Woodward, 1907
Scleromochlus is the generic name of a small archosaur from the Late Triassic period.
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Binomial name
Scleromochlus taylori
Woodward, 1907
Scleromochlus is the generic name of a small archosaur from the Late Triassic period.
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Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
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Chordata
Bateson, 1885
Typical Classes
See below
Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Bateson, 1885
Typical Classes
See below
Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Sauropsida*
Goodrich, 1916
Subclasses
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Goodrich, 1916
Subclasses
- Anapsida
- Diapsida
- Reptilia Laurenti, 1768
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Diapsida
Osborn, 1903
Groups
See text
Diapsids ("two arches") are a group of tetrapod animals that developed two holes (temporal fenestra) in each side of their skulls, about 300 million years ago during the late Carboniferous period.
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Osborn, 1903
Groups
See text
Diapsids ("two arches") are a group of tetrapod animals that developed two holes (temporal fenestra) in each side of their skulls, about 300 million years ago during the late Carboniferous period.
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Archosauromorpha
von Huene, 1946
Orders
See text
Archosauromorpha (Greek for "ruling lizard forms") is an Infraclass of diapsid reptiles that first appeared during the late Permian and became more common during the Triassic.
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von Huene, 1946
Orders
See text
Archosauromorpha (Greek for "ruling lizard forms") is an Infraclass of diapsid reptiles that first appeared during the late Permian and became more common during the Triassic.
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Archosauria
Cope, 1869
Clades
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Cope, 1869
Clades
- Crurotarsi
- Aetosauria
- Crocodilia (crocodiles)
- Phytosauria
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Jacques Gauthier is a vertebrate paleontologist and systematist, and one of the founders of the use of cladistics in paleontology.
He received a BS in Zoology at San Diego State University in 1973, a Masters of Science at the same institute in 1980, and a PhD in Paleontology
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He received a BS in Zoology at San Diego State University in 1973, a Masters of Science at the same institute in 1980, and a PhD in Paleontology
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Dinosauromorpha
Benton, 1984
Clades
Dinosauromorpha is the name of a clade of archosaurs that includes the direct sister groups of dinosaurs, and the order Dinosauria itself.
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Benton, 1984
Clades
- Dromomeron
- Lagerpeton
- Dinosauriformes
Dinosauromorpha is the name of a clade of archosaurs that includes the direct sister groups of dinosaurs, and the order Dinosauria itself.
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Pterosauria
Kaup, 1834
Suborders
Pterodactyloidea
Rhamphorhynchoidea *
Pterosaurs (/ˈtɛ.
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Kaup, 1834
Suborders
Pterodactyloidea
Rhamphorhynchoidea *
Pterosaurs (/ˈtɛ.
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Archosauria
Cope, 1869
Clades
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Cope, 1869
Clades
- Crurotarsi
- Aetosauria
- Crocodilia (crocodiles)
- Phytosauria
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Avemetatarsalia
Benton, 1999
Clades
Avemetatarsalia ("bird feet") is a group name established by Benton in 1999 for the clade consisting of Scleromochlus and Ornithodira.
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Benton, 1999
Clades
- Scleromochlus
- Ornithodira
Avemetatarsalia ("bird feet") is a group name established by Benton in 1999 for the clade consisting of Scleromochlus and Ornithodira.
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A gait is a particular way or manner of moving on foot, e.g.,
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- human gait
- horse gait
- dog gait.
- GAIT (wireless), a standard to enable cross-operation of wireless telephone technologies.
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This article or section needs copy editing for grammar, style, cohesion, tone and/or spelling.
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This article has been tagged since July 2007.
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You can assist by [ editing it] now. A how-to guide is available, as is general .
This article has been tagged since July 2007.
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Dinosauromorpha
Benton, 1984
Clades
Dinosauromorpha is the name of a clade of archosaurs that includes the direct sister groups of dinosaurs, and the order Dinosauria itself.
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Benton, 1984
Clades
- Dromomeron
- Lagerpeton
- Dinosauriformes
Dinosauromorpha is the name of a clade of archosaurs that includes the direct sister groups of dinosaurs, and the order Dinosauria itself.
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Pterosauria
Kaup, 1834
Suborders
Pterodactyloidea
Rhamphorhynchoidea *
Pterosaurs (/ˈtɛ.
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Kaup, 1834
Suborders
Pterodactyloidea
Rhamphorhynchoidea *
Pterosaurs (/ˈtɛ.
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Dinosauria *
Owen, 1842
Orders & Suborders
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Owen, 1842
Orders & Suborders
- Ornithischia
- Cerapoda
- Thyreophora
- Saurischia
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Theropoda
Marsh, 1881
Infraorders
Theropods ('beast feet') are a group of bipedal saurischian dinosaurs.
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Marsh, 1881
Infraorders
- Carnosauria
- Ceratosauria
- Deinonychosauria
- Ornithomimosauria
- Oviraptorosauria
Theropods ('beast feet') are a group of bipedal saurischian dinosaurs.
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Aves
Linnaeus, 1758
Orders
About two dozen - see section below
Birds (class Aves) are bipedal, warm-blooded, egg-laying vertebrate animals.
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Linnaeus, 1758
Orders
About two dozen - see section below
Birds (class Aves) are bipedal, warm-blooded, egg-laying vertebrate animals.
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Pterosauria
Kaup, 1834
Suborders
Pterodactyloidea
Rhamphorhynchoidea *
Pterosaurs (/ˈtɛ.
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Kaup, 1834
Suborders
Pterodactyloidea
Rhamphorhynchoidea *
Pterosaurs (/ˈtɛ.
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Vertebrata
Cuvier, 1812
Classes and Clades
See below
Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns.
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Cuvier, 1812
Classes and Clades
See below
Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns.
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Flight is the process by which an object achieves sustained movement either through the air by aerodynamically generating lift or aerostatically using buoyancy, or movement beyond earth's atmosphere, in the case of spaceflight.
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A gait is a particular way or manner of moving on foot, e.g.,
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- human gait
- horse gait
- dog gait.
- GAIT (wireless), a standard to enable cross-operation of wireless telephone technologies.
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Cladistics is a philosophy of classification that arranges organisms only by their order of branching in an evolutionary tree and not by their morphological similarity, in the words of Luria et al. (1981).
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Pterosauria
Kaup, 1834
Suborders
Pterodactyloidea
Rhamphorhynchoidea *
Pterosaurs (/ˈtɛ.
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Kaup, 1834
Suborders
Pterodactyloidea
Rhamphorhynchoidea *
Pterosaurs (/ˈtɛ.
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Pterosauria
Kaup, 1834
Suborders
Pterodactyloidea
Rhamphorhynchoidea *
Pterosaurs (/ˈtɛ.
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Kaup, 1834
Suborders
Pterodactyloidea
Rhamphorhynchoidea *
Pterosaurs (/ˈtɛ.
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Dinosauromorpha
Benton, 1984
Clades
Dinosauromorpha is the name of a clade of archosaurs that includes the direct sister groups of dinosaurs, and the order Dinosauria itself.
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Benton, 1984
Clades
- Dromomeron
- Lagerpeton
- Dinosauriformes
Dinosauromorpha is the name of a clade of archosaurs that includes the direct sister groups of dinosaurs, and the order Dinosauria itself.
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Herod_Archelaus
