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Nematherium
''Nematherium'' is an extinct genus of ground sloth belonging to Mylodontoidea, it is either considered to be a member of Mylodontidae or Scelidotheriidae. It lived during the Miocene, Middle Miocene epoch (Santacrucian). Fossils have been found in the Cura-Mallín Formation of Chile and the Santa Cruz Formation, Argentina, Santa Cruz and Sarmiento Formations of Argentina.''Nematherium'' at Fossilworks.org 
References Prehistoric sloths Miocene xenarthrans Miocene mammals of South America Santacrucian Neogene Argentina Neogene Chile Fossils of Argentina Fossils of Chile Fossil taxa described in 1887 Tax ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sarmiento Formation
The Sarmiento Formation (Spanish language, Spanish: ''Formación Sarmiento''), in older literature described as the Casamayor Formation, is a geological formation in Chubut Province, Argentina, in central Patagonia, which spans around 30 million years from the mid-Eocene to the early Miocene. It predominantly consists of Pyroclastic rock, pyroclastic deposits, which were deposited in a Semi-arid climate, semi-arid environment. It is divided up into a number of members. The diverse fauna of the Sarmiento Formation, including a variety of birds, crocodilians, turtles and snakes, also includes many mammals such as South American native ungulates (notoungulata, notoungulates, litopterna, litopterns, astrapotheria, astrapotheres) as well as armadillos, and Caviomorpha, caviomorph rodents. Material was copied from this source, which is available under a creativecommons:by/3.0/, Creative Commons Attribution 3.0 International License Paleofauna Amphibians Birds Reptiles Crocodylom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Cruz Formation, Argentina
The Santa Cruz Formation is a geological formation in the Magallanes Basin, Magallanes/Austral Basin in southern Patagonia in Argentina and adjacent areas of Chile. It dates to the late Early Miocene epoch, and is contemporaneous with the eponymous Santacrucian age of the SALMA (South American land mammal age) timescale. The Santa Cruz Formation is known for its abundance of vertebrate fossils, including South American native ungulates (Astrapotheria, astrapotheres, Litopterna, litopterns, Notoungulata, notoungulates), as well as rodents, xenarthrans (armadillos, sloths, anteaters), and metatherians. The formation extends from the Andes to the Atlantic coast. In its coastal section it is divided into two members, the lower, fossil rich Estancia La Costa Member, which consists predominately of tuffaceous deposits and fine grained mudrock, and the upper fossil-poor Estancia La Angelina Member, which consists of sedimentary rock, primarily mudrock, and sandstone. The environment of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santacrucian
The Santacrucian age is a period of geologic time (17.5 – 16.3 Mya (unit), Ma) within the Early Miocene epoch of the Neogene, used more specifically with South American land mammal age, SALMA classification in South America. It follows the Colhuehuapian and precedes the Friasian age. Etymology The age is named after the Santa Cruz Formation in the Magallanes Basin, Austral/Magallanes Basin of southern Patagonia, Argentina and Chile. Formations Fossils References Bibliography ;Santa Cruz Formation * * * * * * * * * * * * * * * * ;Aisol Formation * * ;Cantaure Formation * ;Castillo Formation * * * * * ;Cerro Boleadores Formation * ;Chaguaramas Formation * ;Chilcatay Formation * * * * ;Cura-Mallín Group * * * ;Gran Bajo del Gualicho Formation * ;Jimol Formation * * * * * * * * ;Mariño Formation * * * * * ;Pinturas Formation * * ;Río Yuca Formation * {{SALMA Santacrucian, Miocene South America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scelidotheriidae
Scelidotheriidae is a family of extinct ground sloths within the order Pilosa, suborder Folivora and superfamily Mylodontoidea, related to the other extinct mylodontoid family, Mylodontidae, as well as to the living two-toed sloth family Choloepodidae. The only other extant family of the suborder Folivora is the distantly related Bradypodidae. Erected as the family Scelidotheriidae by Florentino Ameghino, Ameghino in 1889, the taxon was demoted to a subfamily of Mylodontidae by Gaudin in 1995. However, recent collagen sequence data indicates the group is less closely related to ''Mylodon'' and ''Lestodon'' than ''Choloepus'' is, and thus it has been elevated back to full family status by Presslee ''et al.'' (2019). Taxonomy Together with Mylodontidae, and the two-toed sloths, the scelidotheriids form the Taxonomic rank, superfamily Mylodontoidea. ''Chubutherium'' is an ancestral and very plesiomorphic member of this family and does not belong to the main group of closely related ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Golfo San Jorge Basin
The Golfo San Jorge Basin () is a hydrocarbon-rich sedimentary basin located in eastern Patagonia, Argentina. The basin covers the entire San Jorge Gulf and an inland area west of it, having one half located in Santa Cruz Province and the other in Chubut Province. The northern boundary of the basin is the North Patagonian Massif while the Deseado Massif forms the southern boundary of the basin. The basin has largely developed under condition of extensional tectonics, including rifting. The basin is of paleontological significance as it hosts six out of 22 defining formations for the SALMA classification, the geochronology for the Cenozoic used in South America. At the center of the basin accumulated sediments reach more than of thickness. Oil was first discovered in 1907 and over the years it has become the second most productive hydrocarbon basin in Argentina after Neuquén Basin. Stratigraphy The stratigraphy of the Golfo San Jorge Basin covers the following units:Raigem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxa Named By Florentino Ameghino
In biology, a taxon (back-formation from ''taxonomy''; : taxa) is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is very common, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion, especially in the context of rank-based (" Linnaean") nomenclature (much less so under phylogenetic nomenclature). If a taxon is given a formal scientific name, its use is then governed by one of the nomenclature codes specifying which scientific name is correct for a particular grouping. Initial attempts at classifying and ordering organisms (plants and animals) were presumably set forth in prehistoric times by hunter-gatherers, as suggested by the fairly sophisticated folk taxonomies. Much later, Aristotle, and later still ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil Taxa Described In 1887
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Though the fossil record is incomplete, numerous studies have demonstrated that there is enough information available to give a good understanding of the pattern of diversification of life on Earth. In addition, the record can predict and fill gaps such as the discovery of ''Tiktaalik'' in the arctic of Canada. Paleontology includes the study of fossils: their age, method of formation, and evolutionary significance. Specimens are sometimes considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years to 4.1 billion years old. Early edition, published online before print. The ob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neogene Chile
The Neogene ( ,) is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago ( Mya) to the beginning of the present Quaternary Period million years ago. It is the second period of the Cenozoic and the eleventh period of the Phanerozoic. The Neogene is sub-divided into two epochs, the earlier Miocene and the later Pliocene. Some geologists assert that the Neogene cannot be clearly delineated from the modern geological period, the Quaternary. The term "Neogene" was coined in 1853 by the Austrian palaeontologist Moritz Hörnes (1815–1868). The earlier term Tertiary Period was used to define the span of time now covered by Paleogene and Neogene and, despite no longer being recognized as a formal stratigraphic term, "Tertiary" still sometimes remains in informal use. During this period, mammals and birds continued to evolve into modern forms, while other groups of life remained relatively unchanged. The first humans ('' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
