Buitreraptor
Buitreraptor skeleton at the Field Museum of Natural History.
Conservation status
Extinct (fossil)
Scientific classification
Kingdom: Animalia Phylum: Chordata Class: Sauropsida Superorder: Dinosauria Order: Saurischia Suborder: Theropoda Infraorder: Coelurosauria Family: Dromaeosauridae Subfamily: Unenlagiinae Genus: Buitreraptor
Binomial name
Buitreraptor gonzalezorum Makovicky, Apesteguía & Agnolin, 2005

Buitreraptor was a rooster-size predatory dinosaur belonging to the dromaeosaurid family. It was found in Argentina and was described in 2005. Image File history File linksMetadata Download high-resolution version (1296x972, 1229 KB) Skeleton of Buitreraptor at the Field Museum in Chicago. ... Field Museum of Natural History, Chicago The Field Museum of Natural History, in Chicago, Illinois, USA, sits on Lake Shore Drive next to Lake Michigan, part of a scenic complex known as Museum Campus Chicago. ... The conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. ... Three small ammonite fossils, each approximately 1. ... For other uses, see Scientific classification (disambiguation). ... Animalia redirects here. ... Typical Classes See below Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates. ... Subclasses Anapsida Diapsida Reptiles are tetrapods and amniotes, animals whose embryos are surrounded by an amniotic membrane. ... Orders & Suborders Saurischia Sauropodomorpha Theropoda Ornithischia Thyreophora Ornithopoda Marginocephalia Dinosaurs were vertebrate animals that dominated the terrestrial ecosystem for over 160 million years, first appearing approximately 230 million years ago. ... Groups Sauropodomorpha    Saturnalia    Prosauropoda    Sauropoda Theropoda    Eoraptor    Herrerasauridae    Ceratosauria    Tetanurae       Aves(extant) Saurischians (from the Greek Saurischia meaning lizard hip) are one of the two orders/branches of dinosaurs. ... Subdivisions ?Eoraptor Herrerasauria Coelophysoidea Ceratosauria Cryolophosaurus Spinosauridae Carnosauria Coelurosauria Theropods (beast foot) are a group of bipedal saurischian dinosaurs. ... Subclades Nqwebasaurus Proceratosaurus Tyrannoraptora ?Coeluridae ?Compsognathidae Tyrannosauroidea Maniraptoriformes [incertae sedis] Alvarezsauridae Maniraptora Ornithomimosauria Coelurosauria is a group of theropod dinosaurs that includes the subgroups Tyrannosauridae, Ornithomimidae, and Maniraptora. ... Genera Achillobator Adasaurus Atrociraptor Bambiraptor Buitreraptor Dromaeosauroides Dromaeosaurus Deinonychus Neuquenraptor Pyroraptor Saurornitholestes Unenlagia Utahraptor Variraptor Velociraptor Dromaeosaurids, raptors or members of the family Dromaeosauridae (running lizards) are theropod dinosaurs. ... Genera Achillobator Adasaurus Atrociraptor Bambiraptor Buitreraptor Cryptovolans Deinonychus Dromaeosaurus Dromaeosauroides Graciliraptor Microraptor Neuquenraptor Pyroraptor Rahonavis Saurornitholestes Sinornithosaurus Tsaagan Unenlagia Utahraptor Variraptor Velociraptor Dromaeosaurids, raptors or members of the family Dromaeosauridae (running lizards from Greek dromeus (δρομευς) meaning runner and sauros (σαυρος) meaning lizard) are theropod dinosaurs. ... In biology, binomial nomenclature is the formal method of naming species. ... This snapping turtle is trying to make a meal of a Canada goose, but the goose is too wary. ... Orders & Suborders Saurischia Sauropodomorpha Theropoda Ornithischia Thyreophora Ornithopoda Marginocephalia Dinosaurs were vertebrate animals that dominated the terrestrial ecosystem for over 160 million years, first appearing approximately 230 million years ago. ... Genera Achillobator Adasaurus Bambiraptor Cryptovolans Dromaeosaurus Deinonychus Gracilraptor Microraptor Pyroraptor Saurornitholestes Sinornithosaurus Utahraptor Variraptor Velociraptor Among the dinosaurs, the Dromaeosaurids or Dromaeosauridae (running lizards) were fast and agile dominant carnivores throughout the Cretaceous period. ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ...

Buitreraptor gonzalezorum is the only known species of the genus Buitreraptor. The generic name means "vulture raider", from the Spanish word buitre meaning vulture. Furthermore, the area in which the remains were found is called La Buitrera. For other uses of the word, please see Genus (disambiguation). ... For other uses of the word, please see Genus (disambiguation). ... Orders Falconiformes (Fam. ...

Buitreraptor lived about 90 million years ago, when South America was an isolated continent like Australia today. Buitreraptor has some different physical features than typical northern dromaeosaurs, like Velociraptor. Buitreraptor has a slender snout with teeth that lack meat-tearing serrations. From this scientists conclude that this dinosaur was not a big-game hunter like most other dromaeosaurs, but a hunter of small animals such as lizards and mammals. Its long bird-like arms confirm such a life of grasping fast-moving small prey. It has long legs and must have been an agile runner. It most likely had feathers. This dromaeosaur occupied a niche like that of modern secretarybirds or even the dinosaur Troodon from North America. Mega-annum, usually abbreviated as Ma, is a unit of time equal to one million years. ... South America South America is a continent crossed by the equator, with most of its area in the Southern Hemisphere. ... Binomial name Velociraptor mongoliensis Osborn, 1924 Velociraptor (IPA: ; meaning swift thief) is a genus of dromaeosaurid theropod dinosaur that existed approximately 83 to 70 million years ago during the later part of the Cretaceous Period. ... Families Many, see text. ... I smoke weed im growing a blue penis dude#REDIRECT penises are cool ... Aves redirects here. ... Two feathers Feathers are one of the epidermal growths that form the distinctive outer covering, or plumage, on birds. ... Binomial name Sagittarius serpentarius (J. F. Miller, 1779) The Secretary Bird, Sagittarius serpentarius, is an extraordinary member of the bird of prey family. ... Binomial name Troodon formosus Leidy, 1856 Troodon formosus was a relatively small, bird-like dinosaur from the late Cretaceous Period (68–65 MYA). ...

Buitreraptor (front) and Deinonychus (back) skeletons at the Field Museum of Natural History.

Other than Buitreraptor, the only other known dromaeosaurs from the southern continents are Neuquenraptor and Unenlagia from South America (discovered earlier in 2005), Rahonavis (once thought to be a true avian bird) from Madagascar, and unidentified dromaeosaur-like teeth from Australia. The bones in both Buitreraptor and Rahonavis show either that powered flight evolved independently in two different groups of dinosaurs: birds and southern dromaeosaurs, or that flight evolved once in the ancestor of dromaeosaurs, and subsequently the two dromaeosaur lines (northern and southern) became secondarily flightless. Image File history File linksMetadata Download high-resolution version (1776x1432, 526 KB) Buitreraptor (foreground) and Deinonychus (background) skeletons on display at the Field Museum of Natural History in Chicago, Illinois. ... Image File history File linksMetadata Download high-resolution version (1776x1432, 526 KB) Buitreraptor (foreground) and Deinonychus (background) skeletons on display at the Field Museum of Natural History in Chicago, Illinois. ... Binomial name Deinonychus antirrhopus Ostrom, 1969 Deinonychus (IPA ) meaning terrible claw (Greek δεινος meaning terrible and ονυξ/ονυχος meaning claw) was a jaguar-sized, carnivorous dromaeosaurid dinosaur species from the Early Cretaceous Period. ... Field Museum of Natural History, Chicago The Field Museum of Natural History, in Chicago, Illinois, USA, sits on Lake Shore Drive next to Lake Michigan, part of a scenic complex known as Museum Campus Chicago. ... Species N. argentinus Novas & Pol, 2005 Neuquenraptor argentinus is the first dromaeosaurid found from the southern hemisphere. ... Species (type) Calvo, Porfiri & Kellner, 2004 Unenlagia (meaning half-bird) was a genus of theropod dinosaur of the family Dromaeosauridae. ... Rahonavis, from the Late Cretaceous of Madagascar, is the subject of some controversy as to its proper taxonomic position--whether it is a member of the crown clade Aves or a closely related dromaeosaur. ... Flight is the process by which a heavier-than-air animal or object achieves sustained movement either through the air by aerodynamically generating lift or aerostatically using buoyancy, or movement beyond earths atmosphere, in the case of spaceflight. ...

This discovery in the Southern Hemisphere confirms that dinosaurs were more widely dispersed around the world than previously thought. Scientists now think that dromaeosaurs date back to Jurassic times, when all the continents were much closer together. It is possible that they originated on the ancient continent Laurasia in the north and migrated to southern Gondwana later. // The image above is believed to be a replaceable fair use image. ... Laurasia was a supercontinent that most recently existed as a part of the split of the Pangaean supercontinent in the late Mesozoic era. ... Pangaea was formed by the merging of two continents, Laurasia and Gondwana East African and Kuungan Orogens 550 Ma reconstruction showing final stages of assembly The southern supercontinent Gondwana (originally Gondwanaland) included most of the landmasses which make up todays continents of the southern hemisphere, including Antarctica, South America...

The fossilised bones were found in 2005 in sandstone in Patagonia, Argentina - by an excavation lead by Peter Makovicky, curator of dinosaurs at the Field Museum in Chicago). Buitreraptor was discovered in the same fossil site that had earlier yielded Giganotosaurus, one of the largest known carnivorous dinosaurs. 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... Red sandstone interior of Lower Antelope Canyon, Arizona, worn smooth due to erosion by flash flooding over millions of years Sandstone is a sedimentary rock composed mainly of sand-size mineral or rock grains. ... In orange the area most commonly defined as Patagonia. ... Field Museum of Natural History, Chicago The Field Museum of Natural History, in Chicago, Illinois, USA, sits on Lake Shore Drive next to Lake Michigan, part of a scenic complex known as Museum Campus Chicago. ... Binomial name Giganotosaurus carolinii Coria & Salgado, 1995 Giganotosaurus (meaning giant southern lizard, derived from the Ancient Greek gigas/γιγας meaning giant, notos/νοτος meaning south wind and saurus/σαυρος meaning lizard[1]) was a carcharodontosaurid dinosaur that lived 93 to 89 million years ago during the Turonian stage of the Late Cretaceous Period. ...

External links

• BBC News: Bird-like dinosaur forces rethink, 13-Oct-2005
• Drawing and some details from the Natural History Museum, London.
• National Science Foundation web site