| Eoraptor Fossil range: Late Triassic |
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| Eoraptor lunensis Sereno et al. Paul Callistus Sereno (born October 11 1957) is an American paleontologist who is the discoverer of several new Dinosaur species on , 1993 |
Eoraptor was one of the world's earliest dinosaurs. Year 1993 ( MCMXCIII) was a Common year starting on Friday (link will display full 1993 Gregorian calendar) It was a two-legged meat-eater that lived between 230 and 225 million years ago, in what is now the northwestern region of Argentina. Bipedalism is a form of Terrestrial locomotion where an organism moves by means of its two rear limbs A carnivore (ˈkɑrnɪvɔər meaning 'meat eater' ( Latin carne meaning 'flesh' and vorare meaning 'to devour' is any animal with a diet consisting Annum is one form of the Latin noun meaning Year, not a form normally used for derivatives in modern languages the accusative singular For a topic outline on this subject see List of basic Argentina topics. The type species is Eoraptor lunensis, which means 'dawn plunderer [from the Valley] of the Moon', denoting where it was originally discovered (Greek eos/εως meaning 'dawn' or 'morning' and Latin lunensis meaning 'of the moon'). In Taxonomy, a type species is the species that originally defined a genus. The Ancient Greek language is the historical stage in the development of the Hellenic language family spanning the Archaic (c Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. Paleontologists believe the Eoraptor resembles the common ancestor of all dinosaurs. Palaeontology redirects here For the Scientific journal, see Palaeontology (journal. It is known from several well-preserved skeletons.
Description and behavior
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It had a thin body that grew to about 1 meter (3 feet) in length, with an estimated weight of about 10 kilograms (22 pounds). The metre or meter is a unit of Length. It is the basic unit of Length in the Metric system and in the International A foot (plural feet or foot; symbol or abbreviation ft or sometimes &prime – the prime symbol) is a non-SI unit The pound or pound-mass (abbreviation lb, lbm, or sometimes in the United States #) is a unit of Mass It ran digitigrade, upright on its hind legs. A digitigrade is an animal that stands or walks on its digits or toes Its fore limbs were only half the length of its hind limbs and it had five digits on each 'hand'. Three of those digits, the longest of the five, ended in large claws and were presumably used to handle prey. A claw is a curved pointed appendage found at the end of a toe or finger in most Mammals, Birds, and some Reptiles. Scientists have surmised that the fourth and fifth digits were too tiny to be of any use in hunting.
Eoraptor probably ate mostly small animals. It was a swift sprinter and, upon catching its prey, it would use claws and teeth to tear the prey apart. However, it had both carnivore-type and herbivore-type teeth, so it could possibly have been omnivorous. A carnivore (ˈkɑrnɪvɔər meaning 'meat eater' ( Latin carne meaning 'flesh' and vorare meaning 'to devour' is any animal with a diet consisting Herbivory is a form of Predation in which an Organism, known as a herbivore, consumes principally Autotrophs ref name=Campbell>Campbell Omnivores (from Latin omne all everything vorare to devour are species that eat both Plants and Animals as their primary
Early dinosaur
The bones of this primitive dinosaur were first discovered in 1991, by University of Chicago paleontologist Paul Sereno, in the Ischigualasto Basin of Argentina. Year 1991 ( MCMXCI) was a Common year starting on Tuesday (link will display full calendar of the Gregorian Calendar. The University of Chicago is a Private university located principally in the Hyde Park neighborhood of Chicago. Paul Callistus Sereno (born October 11 1957) is an American paleontologist who is the discoverer of several new Dinosaur species on For a topic outline on this subject see List of basic Argentina topics. During the Late Triassic Period, this was a river valley but is now desert badlands. The Triassic is a geologic period and system that extends from about 251 to 199 Ma (million years ago A desert is a Landscape or region that receives very little precipitation. Badlands are a type of Arid Terrain where softer sedimentary rocks and Clay -rich Soils have been extensively eroded by Wind Eoraptor was found in the Ischigualasto Formation, the same formation that yielded Herrerasaurus, a very early theropod. Ischigualasto is a geological formation and a natural park associated with it in the province of San Juan, north-western Argentina, near the border Herrerasaurus (meaning "Herrera's lizard" after the name of the rancher who discovered the first Fossil of the animal was one of the earliest By 1993 it had been determined to be one of the earliest dinosaurs. Year 1993 ( MCMXCIII) was a Common year starting on Friday (link will display full 1993 Gregorian calendar) Its age was determined by several factors, not least because it lacked the specialised features of any of the major groups of later dinosaurs, including its lack of specialized predatory features. Unlike later carnivores, it lacked a sliding joint at the articulation of the lower jaw, with which to hold large prey. The jaw is either of the two opposable structures forming or near the entrance to the Mouth. Furthermore, only some of its teeth were curved and saw-edged, unlike those in a later predator's mouth.
Eoraptor belonged to a major group of dinosaurs called saurischians, or lizard-hipped dinosaurs. Saurischia (sɔːˈrɪskiə, from the Greek sauros ( σαυρος) meaning 'lizard' and ischion ( ισχιον) meaning 'hip joint' Their hip structures are similar to that of the modern lizard.
The fact that it possessed some herbivore teeth and five fully developed 'fingers' has led scientists to place Eoraptor at more ancient than even Herrerasaurus. Herbivory is a form of Predation in which an Organism, known as a herbivore, consumes principally Autotrophs ref name=Campbell>Campbell Only some prosauropods, recently discovered in Madagascar, are thought to be older. Prosauropoda (ˌproʊsɔˈrɒpədə or prosauropods (/proʊˈsɔroʊpɒd/ were a group of early Herbivorous Dinosaurs that lived during the Triassic Madagascar, or Republic of Madagascar (older name Malagasy Republic) is an Island nation in the Indian Ocean off the southeastern There is a possibility that Staurikosaurus may be older, but it is rather large. Staurikosaurus (" Lizard of the Southern Cross" is a Genus of early Dinosaur from the Late Triassic of Brazil Staurikosaurus seems to have features in common with both prosauropods and theropods, which has led scientists to question how primitive Eoraptor was in relation to other dinosaurs.
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