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Aucasaurus
''Aucasaurus'' is a genus of medium-sized abelisaurid theropod dinosaur from Argentina that lived during the Late Cretaceous (Santonian to Campanian stage) of the Anacleto Formation. It was smaller than the related ''Carnotaurus'', although more derived in some ways, such as its extremely reduced arms and almost total lack of fingers. The type skeleton is complete to the thirteenth caudal vertebra, and so is relatively well understood, and is the most complete abelisaurid yet described. However, the skull is damaged, causing some paleontologists to speculate that it was involved in a fight prior to death. In 2009, Novas suggested that ''Aucasaurus garridoi'' might be a junior synonym of '' Abelisaurus comahuensis''. In 2010, Gregory S. Paul renamed ''Aucasaurus garridoi'' into ''Abelisaurus garridoi''. Despite their similarities, other researchers have placed both genera as separate taxa. Discovery ''Aucasaurus'' is known from finds in the Río Colorado Subgroup, a Late Creta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aucasaurus Braincase
''Aucasaurus'' is a genus of medium-sized Abelisauridae, abelisaurid theropod dinosaur from Argentina that lived during the Late Cretaceous (Santonian to Campanian faunal stage, stage) of the Anacleto Formation. It was smaller than the related ''Carnotaurus'', although more derived in some ways, such as its extremely reduced arms and almost total lack of fingers. The type skeleton is complete to the thirteenth caudal vertebra, and so is relatively well understood, and is the most complete abelisaurid yet described. However, the skull is damaged, causing some paleontologists to speculate that it was involved in a fight prior to death. In 2009, Novas suggested that ''Aucasaurus garridoi'' might be a junior synonym of ''Abelisaurus comahuensis''. In 2010, Gregory S. Paul renamed ''Aucasaurus garridoi'' into ''Abelisaurus garridoi''. Despite their similarities, other researchers have placed both genera as separate taxa. Discovery ''Aucasaurus'' is known from finds in the Río Color ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aucasaurus Garridoi By Paleocolour
''Aucasaurus'' is a genus of medium-sized abelisaurid theropod dinosaur from Argentina that lived during the Late Cretaceous (Santonian to Campanian stage) of the Anacleto Formation. It was smaller than the related ''Carnotaurus'', although more derived in some ways, such as its extremely reduced arms and almost total lack of fingers. The type skeleton is complete to the thirteenth caudal vertebra, and so is relatively well understood, and is the most complete abelisaurid yet described. However, the skull is damaged, causing some paleontologists to speculate that it was involved in a fight prior to death. In 2009, Novas suggested that ''Aucasaurus garridoi'' might be a junior synonym of '' Abelisaurus comahuensis''. In 2010, Gregory S. Paul renamed ''Aucasaurus garridoi'' into ''Abelisaurus garridoi''. Despite their similarities, other researchers have placed both genera as separate taxa. Discovery ''Aucasaurus'' is known from finds in the Río Colorado Subgroup, a Late Creta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aucasaurus Garridoi Scale Diagram
''Aucasaurus'' is a genus of medium-sized abelisaurid theropod dinosaur from Argentina that lived during the Late Cretaceous (Santonian to Campanian stage) of the Anacleto Formation. It was smaller than the related ''Carnotaurus'', although more derived in some ways, such as its extremely reduced arms and almost total lack of fingers. The type skeleton is complete to the thirteenth caudal vertebra, and so is relatively well understood, and is the most complete abelisaurid yet described. However, the skull is damaged, causing some paleontologists to speculate that it was involved in a fight prior to death. In 2009, Novas suggested that ''Aucasaurus garridoi'' might be a junior synonym of '' Abelisaurus comahuensis''. In 2010, Gregory S. Paul renamed ''Aucasaurus garridoi'' into ''Abelisaurus garridoi''. Despite their similarities, other researchers have placed both genera as separate taxa. Discovery ''Aucasaurus'' is known from finds in the Río Colorado Subgroup, a Late Creta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abelisauridae
Abelisauridae (meaning "Abel's lizards") is a family (or clade) of ceratosaurian theropod dinosaurs. Abelisaurids thrived during the Cretaceous period, on the ancient southern supercontinent of Gondwana, and today their fossil remains are found on the modern continents of Africa and South America, as well as on the Indian subcontinent and the island of Madagascar. Isolated teeth were found in the Late Jurassic of Portugal, and the Late Cretaceous genera ''Tarascosaurus'' and '' Arcovenator'' have been described in France. Abelisaurids first appear in the fossil record of the early middle Jurassic period, and at least two genera (the Moroccan '' Chenanisaurus'' and the Madagascan '' Majungasaurus'') survived until the end of the Mesozoic era 66 million years ago. Like most theropods, abelisaurids were carnivorous bipeds. They were characterized by stocky hind limbs and extensive ornamentation of the skull bones, with grooves and pits. In many abelisaurids, such as '' Carnotaur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abelisaurid
Abelisauridae (meaning "Abel's lizards") is a family (or clade) of ceratosaurian theropod dinosaurs. Abelisaurids thrived during the Cretaceous period, on the ancient southern supercontinent of Gondwana, and today their fossil remains are found on the modern continents of Africa and South America, as well as on the Indian subcontinent and the island of Madagascar. Isolated teeth were found in the Late Jurassic of Portugal, and the Late Cretaceous genera ''Tarascosaurus'' and ''Arcovenator'' have been described in France. Abelisaurids first appear in the fossil record of the early middle Jurassic period, and at least two genera (the Moroccan '' Chenanisaurus'' and the Madagascan ''Majungasaurus'') survived until the end of the Mesozoic era 66 million years ago. Like most theropods, abelisaurids were carnivorous bipeds. They were characterized by stocky hind limbs and extensive ornamentation of the skull bones, with grooves and pits. In many abelisaurids, such as '' Carnotaurus'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carnotaurini
Carnotaurini is a tribe of the theropod dinosaur family Abelisauridae from the Late Cretaceous period of Patagonia. It includes the dinosaurs ''Carnotaurus sastrei''; the type species, ''Aucasaurus garridoi'', and ''Abelisaurus comahuensis''. This group was first proposed by paleontologists Rodolfo Coria, Luis Chiappe, and Lowell Dingus in 2002, being defined as a clade containing "''Carnotaurus sastrei'', ''Aucasaurus garridoi'', their most recent common ancestor, and all of its decendants." Description Anatomical description and geological distribution Carnotaurins were relatively lightly built but large theropods, ranging in size from 6.1-7.8 m (20-25.6 ft) and 1400–2000 kg (1.6-2.3 tons) in weight. Their geographical distribution lied in South America, as all three species have been found in various formations in Argentina, being the Anacleto Formation of the Rio Colorado Subgroup in the Neuquén Basin and possibly the Sir Fernandez field of the Allen Formation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carnotaurus
''Carnotaurus'' (; ) is a genus of theropod dinosaur that lived in South America during the Late Cretaceous period, probably sometime between 71 and 69 million years ago. The only species is ''Carnotaurus sastrei''. Known from a single well-preserved skeleton, it is one of the best-understood theropods from the Southern Hemisphere. The skeleton, found in 1984, was uncovered in the Chubut Province of Argentina from rocks of the La Colonia Formation. ''Carnotaurus'' is a derived member of the Abelisauridae, a group of large theropods that occupied the large predatorial niche in the southern landmasses of Gondwana during the late Cretaceous. Within the Abelisauridae, the genus is often considered a member of the Brachyrostra, a clade of short-snouted forms restricted to South America. ''Carnotaurus'' was a lightly built, bipedal predator, measuring in length and weighing . As a theropod, ''Carnotaurus'' was highly specialized and distinctive. It had thick horns above the eyes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abelisaurus
''Abelisaurus'' (; "Abel's lizard") is a genus of predatory abelisaurid theropod dinosaur alive during the Late Cretaceous Period (Campanian) of what is now South America. It was a bipedal carnivore that probably reached about in length, although this is uncertain as it is known from only one partial skull. Discovery and naming Coining the type species ''Abelisaurus comahuensis'', both genus and species were named and described by Argentine paleontologists José Bonaparte and Fernando Emilio Novas in 1985. The generic name recognizes Roberto Abel as the discoverer of the type specimen, and also as the former director of the provincial Museum of Cipolletti in Argentina, where the specimen is housed. It also incorporates the Greek ('), meaning 'lizard'. The specific name ''comahuensis'' honors the Comahue region of Argentina, where the fossil was found. The holotype, MC 11098, was in 1983 uncovered at the "Cantera de la Pala Mécanica"-site in the Lago Pellegrini quarries exp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Majungasaurus
''Majungasaurus'' (; ) is a genus of abelisaurid theropod dinosaur that lived in Madagascar from 70 to 66 million years ago, at the end of the Cretaceous Period, making it one of the last known non-avian dinosaurs that went extinct during the Cretaceous–Paleogene extinction event. The genus contains a single species, ''Majungasaurus crenatissimus''. This dinosaur is also called ''Majungatholus'', a name which is considered a junior synonym of ''Majungasaurus''. Like other abelisaurids, ''Majungasaurus'' was a bipedal predator with a short snout. Although the forelimbs are not completely known, they were very short, while the hind limbs were longer and very stocky. It can be distinguished from other abelisaurids by its wider skull, the very rough texture and thickened bone on the top of its snout, and the single rounded horn on the roof of its skull, which was originally mistaken for the dome of a pachycephalosaur. It also had more teeth in both upper and lower jaws than most ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anacleto Formation
The Anacleto Formation is a geologic formation with outcrops in the Argentine Patagonian provinces of Mendoza, Río Negro, and Neuquén. It is the youngest formation within the Neuquén Group and belongs to the Río Colorado Subgroup. Formerly that subgroup was treated as a formation, and the Anacleto Formation was known as the Anacleto Member. The type locality of this formation lies west of the city of Neuquén. At its base, the Anacleto Formation conformably overlies the Bajo de la Carpa Formation, also of the Río Colorado Subgroup, and it is in turn unconformably overlain by the Allen Formation of the younger Malargüe Group. The Anacleto Formation varies between thick, and consists mainly of claystones and mudstones, purple and dark red in color, deposited in fluvial, lacustrine and floodplain environments. Geodes are often found scattered throughout this formation. Fossil content The following animals are known from bones found in the Anacleto Formation: * se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Río Colorado Subgroup
The Río Colorado Subgroup, formerly named as Río Colorado Formation, is a Late Cretaceous (Santonian to Early Campanian) geologic subgroup of the Neuquén Basin in northern Patagonia, Argentina. It belongs to the Neuquén Group and contains the Anacleto and Bajo de la Carpa Formations. The subgroup overlies the Río Neuquén Subgroup and is overlain by the Allen Formation of the Malargüe Group, separated by an unconformity dated to 79 Ma.Leanza et al., 2004, p.63 Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.Weishampel et al., 2004, pp. 603-604 Fossil content Ornithischians Sauropods Titanosaur eggs are known from Neuquén Province."63.6 Provincia de Neuquén, Argentina; 3. Río Colorado Formation," in Weishampel, et al. (2004). Page 603. Theropods See also * List of stratigraphic units with dinosaur body fossils * List of stratigraphic units with dinosaur trace fossils This is a list of s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endocast
An endocast is the internal cast of a hollow object, often referring to the cranial vault in the study of brain development in humans and other organisms. Endocasts can be artificially made for examining the properties of a hollow, inaccessible space, or they may occur naturally through fossilization. Cranial endocasts Artificial casts Endocasts of the inside of the neurocranium (braincase) are often made in paleoanthropology to study brain structures and hemispheric specialization in extinct human ancestors. While an endocast can not directly reveal brain structure, it can allow scientists to gauge the size of areas of the brain situated close to the surface, notably Wernicke's and Broca's areas, responsible for interpreting and producing speech. Traditionally, the casting material is some form of rubber or rubber-like material. The openings to the brain cavity, except for the ''foramen magnum'', are closed, and the liquid rubber is slushed around in the empty cranial vault ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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