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Nothrotheriini
Nothrotheriidae is a family of extinct ground sloths that lived from approximately 17.5 mya—10,000 years ago, existing for approximately . Previously placed within the tribe Nothrotheriini or subfamily Nothrotheriinae within Megatheriidae, they are now usually placed in their own family, Nothrotheriidae. Nothrotheriids appeared in the Burdigalian, some 19.8 million years ago, in South America. The group includes the comparatively slightly built ''Nothrotheriops'', which reached a length of about . While nothrotheriids were small compared to some of their megatheriid relatives, their claws provided an effective defense against predators, like those of larger anteaters today. Evolution During the late Miocene and Pliocene, the sloth genus '' Thalassocnus'' of the west coast of South America became adapted to a shallow-water marine lifestyle. However, the family placement of ''Thalassocnus'' has been disputed; while long considered a nothrotheriid, one recent analysis moves it to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aymaratherium
''Aymaratherium'' is an extinct genus of nothrotheriid ground sloths that lived during the Late Miocene and Early Pliocene of Bolivia. Fossils of ''Aymaratherium'' have been found in the Pomata Ayte locality of the Umala Formation. Etymology The genus name, ''Aymaratherium'', is derived from the Aymara, a native ethnic group and language from the Andes, and ''therion'', meaning "beast". The specific name honors Jean Joinville Vacher, for his friendship and constant support for palaeontological investigations over the years. Discovery ''Aymaratherium'' was first described in 2016 on the basis of a nearly complete right dentary (specimen MNHN-Bol-V 008954), which was made of the holotype. In addition, three complete humeri (MNHN-Bol-V 003789, 012874 and 012875), a right astragalus (MNHN-Bol-V 012983), and a complete right calcaneus (MNHN-Bol-V 003307) have also been assigned to the genus. The locality of the holotype was recovered from the Pomata-Ayte locality, in the Umala Forma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mionothropus
''Mionothropus'' is an extinct genus of nothrotheriine nothrotheriid sloth which existed in Peru in the western Amazon Basin, during the late Miocene (Huayquerian age). It is known from the holotype LACM 4609/117533, which includes cranial remains, recovered from the riverbank deposits of the Iñapari Formation in the Río Acre region, were originally assigned to '' Nothropus priscus''. It was first named by Gerardo De Iuliis, Timothy J. Gaudin and Matthew J. Vicars in 2011 and the type species is ''Mionothropus cartellei''. The generic name is derived from "Mio", is a reference to the Miocene provenance of the holotype, and "nothropus" refers to the initial allocation of the holotype to this genus from the South American Pleistocene. The specific name honours Dr. Castor Cartelle. Phylogeny Cladogram A cladogram (from Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, how ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chasicobradys
''Chasicobradys'' is an extinct genus of ground sloths of the family Nothrotheriidae that lived in what is now Argentina. ''Chasicobradys'' was discovered in the Arroyo Chasicó Formation, in Buenos Aires Province. It is only known from jaw fragments and teeth, which allowed the identification of this species, and was classified as a member of the nothrotheriid subfamily Nothrotheriinae, which comprises small to medium-sized species of ground sloths. Etymology The genus name, ''Chasicobradys'', is derived from the Arroyo Chasicó Formation in Argentina and ''bradys'' meaning "slow". was found. The specific name means "intermediate". Description ''Chasicobradys'' is a medium-sized species, similar in size to the Argentine species '' Neohapalops rothi'', characterized by a very high mandibular ramus and characteristics of its molariform teeth, such as the lack of a diastema between the first and second molars and the oblique location of the fourth molars. ''Chasicobradys' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Society Of Vertebrate Paleontology
The Society of Vertebrate Paleontology (SVP) is a professional organization that was founded in the United States in 1940 to advance the science of vertebrate paleontology around the world. Mission and Activities SVP has about 2,300 members internationally and holds annual scientific conferences in North America and elsewhere. It is organized for educational and scientific purposes with a mission to "advance the science of vertebrate paleontology and to serve the common interests and facilitate the cooperation of all persons concerned with the history, evolution, comparative anatomy, and taxonomy of vertebrate animals, as well as field occurrence, collection, and study of fossil vertebrates and the stratigraphy of the beds in which they are found." SVP is also concerned with the conservation and preservation of fossil sites. SVP publications include the ''Journal of Vertebrate Paleontology'', the ''SVP Memoir Series'', the ''News Bulletin'', the''Bibliography of Fossil Vertebrates' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annum
A year or annus is the orbital period of a planetary body, for example, the Earth, moving in its orbit around the Sun. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by change in weather, the hours of daylight, and, consequently, vegetation and soil fertility. In temperate and subpolar regions around the planet, four seasons are generally recognized: spring, summer, autumn and winter. In tropical and subtropical regions, several geographical sectors do not present defined seasons; but in the seasonal tropics, the annual wet and dry seasons are recognized and tracked. A calendar year is an approximation of the number of days of the Earth's orbital period, as counted in a given calendar. The Gregorian calendar, or modern calendar, presents its calendar year to be either a common year of 365 days or a leap year of 366 days, as do the Julian calendars. For the Gregorian calendar, the average length of the calendar year (the mea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ground Sloth
Ground sloths are a diverse group of extinct sloths in the mammalian superorder Xenarthra. The term is used to refer to all extinct sloths because of the large size of the earliest forms discovered, compared to existing tree sloths. The Caribbean ground sloths, the most recent survivors, lived in the Antilles, possibly until 1550 BCE. However, radiocarbon dating suggests an age of between 2819 and 2660 BCE for the last occurrence of ''Megalocnus'' in Cuba. Ground sloths had been extinct on the mainland of North and South America for 10,000 years or more. They survived 5,000–6,000 years longer in the Caribbean than on the American mainland, which correlates with the later colonization of this area by humans. Much ground sloth evolution took place during the late Paleogene and Neogene of South America, while the continent was isolated. At their earliest appearance in the fossil record, the ground sloths were already distinct at the family level. The presence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence. More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pronothrotherium
''Pronothrotherium'' is an extinct genus of ground sloths from Argentina and Uruguay. Fossils of ''Pronothrotherium'' have been found in the Ituzaingó Formation of Argentina.''Pronothrotherium'' at Fossilworks
Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database
The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals ... .org The body weight of the animal has been estimated at .
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Nothrotherium
''Nothrotherium'' is an extinct genus of medium-sized ground sloth from South America (Bolivia, Brazil and the Ware Formation, La Guajira, Colombia).Amson et al., 2016, p.12 It differs from ''Nothrotheriops'' in smaller size and differences in skull and hind leg bones, but both genera can be traced back to ''Hapalops'', the genus which both evolved from in different ecological conditions. Taxonomy ''Nothrotherium'' is derived from the Greek ''nothros'' ωθρός meaning "lazy" or "slothful," and ''therion'' ηρίον "beast", and the species ''N. maquinense'' is named after the Maquiné Grotto in Brazil, where it was found. Synonyms such as ''Coelodon'' occasionally cause confusion where they occur in early texts such as that of Alfred Russel Wallace's major work, ''The Geographical Distribution of Animals'' (1876). This genus formerly included the species ''Nothrotheriops shastensis'', which was later moved to ''Nothrotheriops''. Description Analysis of a coprolite associa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nothrotheriops
''Nothrotheriops'' is a genus of Pleistocene ground sloth found in North America, from what is now central Mexico to the southern United States. This genus of bear-sized xenarthran was related to the much larger, and far more famous ''Megatherium'', although it has recently been placed in a different family, Nothrotheriidae. The best known species, ''N. shastensis'', is also called the Shasta ground sloth. Taxonomy, history, and etymology ''Nothrotheriops'' fossils were first collected by the University of California's Anthropology Department during an exploration of caves at Potter Creek Cave in Shasta County, California, the fossils dating to the late Quaternary period.Sinclair, W. J. (1905). ''New mammalia from the Quaternary caves of California''. University of California Press.McDonald, H. G. (1995). Gravigrade xenarthrans from the early Pleistocene Leisey Shell Pit lA, Hillsborough County, Florida. ''Bulletin of the Florida Museum of Natural History'', ''37''(11), 245-373 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nothropus
''Nothropus'' is an extinct genus of ground sloth of the family Nothrotheriidae, endemic to South America during the Pleistocene epoch. It lived from 0.781 mya—12,000 years ago existing for approximately . It was believed to be a ground-dwelling herbivore. Taxonomy ''Nothropus priscus'' and ''Nothropus nordenskioldi'' are described as subtaxa. ''Nothropus'' was named by Hermann Burmeister (1882). It was assigned to Megalonychidae by L. G. Marshall and T. Sempere (1991) and to Nothrotheriidae by Christian de Muizon et al. (2004). Fossil distribution Fossils have been uncovered from the Tarija Formation, Tarija Department Tarija () is a department in Bolivia. It is located in south-eastern Bolivia bordering with Argentina to the south and Paraguay to the east. According to the 2012 census, it has a population of 482,196 inhabitants. It has an area of . The city ..., Bolivia, east side of the Andes Mountains. References * ''Classification of Mammals'' by Malcolm C. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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