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Thylacosmilus
''Thylacosmilus'' is an extinct genus of Saber-toothed predator, saber-toothed metatherian mammals that inhabited South America from the Miocene, Late Miocene to Pliocene Epoch (geology), epochs. Though ''Thylacosmilus'' looks similar to the "Machairodontinae, saber-toothed cats", it was not a felid, like the well-known North American ''Smilodon'', but a Sparassodonta, sparassodont, a group closely related to marsupials, and only superficially resembled other saber-toothed mammals due to convergent evolution. A 2005 study found that the bite forces of ''Thylacosmilus'' and ''Smilodon'' were low, which indicates the killing-techniques of saber-toothed animals differed from those of extant species. Remains of ''Thylacosmilus'' have been found primarily in Catamarca Province, Catamarca, Entre Ríos Province, Entre Ríos, and La Pampa Provinces in northern Argentina. Taxonomy In 1926, the Marshall Field Paleontological Expeditions collected mammal fossils from the Ituzaingó Format ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thylacosmilus Holotype FMNH
''Thylacosmilus'' is an extinct genus of saber-toothed metatherian mammals that inhabited South America from the Late Miocene to Pliocene epochs. Though ''Thylacosmilus'' looks similar to the "saber-toothed cats", it was not a felid, like the well-known North American ''Smilodon'', but a sparassodont, a group closely related to marsupials, and only superficially resembled other saber-toothed mammals due to convergent evolution. A 2005 study found that the bite forces of ''Thylacosmilus'' and ''Smilodon'' were low, which indicates the killing-techniques of saber-toothed animals differed from those of extant species. Remains of ''Thylacosmilus'' have been found primarily in Catamarca, Entre Ríos, and La Pampa Provinces in northern Argentina. Taxonomy In 1926, the Marshall Field Paleontological Expeditions collected mammal fossils from the Ituzaingó Formation of Corral Quemado, in Catamarca Province, northern Argentina. Three specimens were recognized as representing a new ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sparassodonta
Sparassodonta (from Ancient Greek, Greek ['], to tear, rend; and , gen. [', '], tooth) is an extinct order (biology), order of carnivore, carnivorous metatherian mammals native to South America, related to modern marsupials. They were once considered to be true marsupials, but are now thought to be a separate side branch that split before the last common ancestor of all modern marsupials. A number of these mammalian predators closely resemble placental predators that evolved separately on other continents, and are cited frequently as examples of convergent evolution. They were first described by Florentino Ameghino, from fossils found in the Santa Cruz beds of Patagonia. Sparassodonts were present throughout South America's long period of "splendid isolation" during the Cenozoic; during this time, they shared the niches for large warm-blooded predators with the flightless Phorusrhacidae, terror birds. Previously, it was thought that these mammals died out in the face of competit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thylacosmilinae
Thylacosmilidae is an extinct family of metatherian predators, related to the modern marsupials, which lived in South America between the Miocene and Pliocene epochs. Like other South American mammalian predators that lived prior to the Great American Biotic Interchange, these animals belonged to the order Sparassodonta, which occupied the ecological niche of many eutherian mammals of the order Carnivora from other continents. The family's most notable feature are the elongated, laterally flattened fangs, which is a remarkable evolutionary convergence with other saber-toothed mammals like ''Barbourofelis'' and ''Smilodon''. Taxonomic history The family Thylacosmilidae was originally erected by Riggs in 1933, to accommodate ''Thylacosmilus'', found in the Pliocene Brochero Formation of Argentina. Later, the family was demoted to a subfamily, as Thylacosmilinae, within Borhyaenidae, a group of superficially canid-like sparassodonts, under the assumption that ''Thylacosmilus'' w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saber-toothed Predator
A saber-tooth (alternatively spelled sabre-tooth) is any member of various extinct groups of predatory therapsids, predominantly carnivoran mammals, that are characterized by long, curved saber-shaped canine teeth which protruded from the mouth when closed. Saber-toothed mammals have been found almost worldwide from the Eocene epoch to the end of the Pleistocene epoch 42 million years ago ( mya) – 11,000 years ago (kya). One of the best-known genera is the machairodont or "saber-toothed cat" ''Smilodon'', the species of which, especially ''S. fatalis'', are popularly referred to as "saber-toothed tigers", although they are not closely related to tigers ('' Panthera''). Despite some similarities, not all saber-tooths are closely related to saber-toothed cats or felids in-general. Instead, many members are classified into different families of Feliformia, such as Barbourofelidae and Nimravidae; the oxyaenid "creodont" genera ''Machaeroides'' and '' Apataelurus''; and two exti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huayquerian
The Huayquerian ( es, Huayqueriense) age is a period of geologic time (9.0–6.8 Ma) within the Late Miocene epoch of the Neogene, used more specifically within the SALMA classification. It follows the Mayoan and precedes the Montehermosan age. Etymology The age is named after the Huayquerías Formation in the western Cuyo Basin of northwestern Argentina that was later dated to the Montehermosan. The most complete Huayquerian fauna is found in the Cerro Azul Formation The Cerro Azul Formation ( es, Formación Cerro Azul), in the Buenos Aires Province also described as Epecuén Formation, is a geological formation of Late Miocene (Tortonian, or Huayquerian in the SALMA classification) age in the Colorado Basin ..., in Buenos Aires Province also referred to as Epecuén Formation. Formations Fossil content Correlations Notes and references Notes References Bibliography ;Huayquerías Formation * * ;Andalhuala Formation * ;Camacho Formation * * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ituzaingó Formation
The Ituzaingó Formation ( es, Formación Ituzaingó), in older literature also described as Entre Ríos or Entrerriana Formation, is an extensive geological formation of Late Miocene (Tortonian, or Huayquerian in the SALMA classification) age in the Paraná Basin of the Corrientes, Santa Fe and Entre Ríos Provinces in Mesopotamia, northeastern Argentina.Ituzaingó Formation at .org The formation comprises s, cross-bedded |
Marsupial
Marsupials are any members of the mammalian infraclass Marsupialia. All extant marsupials are endemic to Australasia, Wallacea and the Americas. A distinctive characteristic common to most of these species is that the young are carried in a pouch. Marsupials include opossums, Tasmanian devils, kangaroos, koalas, wombats, wallabies, bandicoots, and the extinct thylacine. Marsupials represent the clade originating from the last common ancestor of extant metatherians, the group containing all mammals more closely related to marsupials than to placentals. They give birth to relatively undeveloped young that often reside in a pouch located on their mothers' abdomen for a certain amount of time. Close to 70% of the 334 extant species occur on the Australian continent (the mainland, Tasmania, New Guinea and nearby islands). The remaining 30% are found in the Americas—primarily in South America, thirteen in Central America, and one species, the Virginia opossum, in North America, n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marshall Field Paleontological Expeditions
The Captain Marshall Field Expeditions were undertaken by the Field Museum of Natural History in Chicago, Illinois. The two Captain Marshall Field paleontological expeditions had the goal of finding South American Cenozoic mammals. The mammals of South America had evolved in near total isolation from the rest of the world from almost the beginning of the Cenozoic Era until only a few million years ago. Captain Marshall Field Brazilian Expedition In addition to his regular annuity of $100,000, in 1927 Captain Marshall Field provided $40,000 to defray the expenses of the Brazilian Expedition under the leadership of Mr. George K. Cherrie. Mrs. Marshall Field III and Mrs. Ernest Thompson Seton were members of this expedition, and the following members of the Museum staff participated: * Dr. B. E. Dahlgren, Acting Curator of the Department of Botany, assisted by J. R. Millar and George Petersen * Professor Henry W. Nichols, Associate Curator of Geology * Assistant Curator Karl P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subfamily
In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end subfamily botanical names with "-oideae", and zoological names with "-inae". See also * International Code of Nomenclature for algae, fungi, and plants * International Code of Zoological Nomenclature * Rank (botany) * Rank (zoology) In biological classification, taxonomic rank is the relative level of a group of organisms (a taxon) in an ancestral or hereditary hierarchy. A common system consists of species, genus, family, order, class, phylum, kingdom, domain. While ... Sources {{biology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleontological Society Of America
The Paleontological Society, formerly the Paleontological Society of America, is an international organisation devoted to the promotion of paleontology. The Society was founded in 1908 in Baltimore, Maryland, and was incorporated in April 1968 in the District of Columbia. The Society publishes the bi-monthly ''Journal of Paleontology'' and the quarterly ''Paleobiology'', holds an annual meeting in the autumn in conjunction with the Geological Society of America, sponsors conferences and lectures, and provides grants and scholarships. The Society has five geographic sections—Pacific Coast (founded March 1911), North-Central (founded May 1974), Northeastern (founded March 1977), Southeastern (founded November 1979), Rocky Mountain (founded October 1985), and South-Central (founded November 1988). Medals and awards The Society recognizes distinguished accomplishments through three awards, one recognized by a medal, the other two by inscribed plaques normally presented annually: *T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Borhyaenids
Borhyaenidae is an extinct metatherian family (biology), family of low-slung, heavily built predatory mammals in the order Sparassodonta. Borhyaenids are not true marsupials, but members of a sister taxon, Sparassodonta. Like most metatherians, borhyaenids and other sparassodonts are thought to have had a pouch to carry their offspring around. Borhyaenids had strong and powerful jaws, like those of the unrelated placentalians ''Hyaenodon'' and ''Andrewsarchus'', for crushing bones. Borhyaenids grew up to an average of long. ''Borhyaena'' is the type genus of this group. Originally, the borhyaenids were one of the most diverse groups of sparassodonts, including all species not originally included in the Thylacosmilidae. However, in recent years, with the elevation of most sparassodont subfamilies to family rank and the discovery that borhyaenids are more closely related to Proborhyaenidae, proborhyaenids and Thylacosmilidae, thylacosmilids than other sparassodonts, the family ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corral Quemado, Catamarca
Corral Quemado is a village and municipality in Catamarca Province in northwestern Argentina. References Populated places in Catamarca Province {{Catamarca-geo-stub ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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