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Analcitherium
''Analcitherium'' is an extinct genus of scelidotheriid sloth that lived during the Early Miocene in what is now Argentina. Fossils have been found in the Santa Cruz Formation of Argentina. Taxonomy '' Analcitherium'' was first named by Florentino Ameghino in 1891 based on fossils found in Argentina, dating to the Early Miocene. Originally thought to belong to a juvenile '' Nematherium'', it is now usually considered to be a distinct genus. ''Analcitherium'' is a member of the Scelidotheriidae, a group of terrestrial sloths known from the Oligocene and Pleistocene that a characterized by an elongated snout. Although scelidotheriids are usually placed as a subfamily of the Mylodontidae, they are sometimes considered to be a separate family, 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolivartherium
''Bolivartherium'' is an extinct genus of mylodontine mylodontid sloth that lived during the Late Miocene and Late Pliocene in what is now Venezuela. Fossils have been found in the Codore and Urumaco Formations of Venezuela. Etymology The generic name, ''Bolivartherium'', is named in honour of Libertador Simón Bolívar, a Venezuelan military and political leader. The specific name is derived from the Urumaco Formation in which it was found in. A second species, ''B. codorensis'', was named in 2006 after the Codore Formation in which it was found in. Description ''Bolivartherium'' is a medium-sized mylodontine that was smaller than the quaternary species of ''Lestodon''. It can be distinguished from the latter in having a lower rostrum and the upper caniform which is more curved than in ''Lestodon'', much like ''Lestodon'' sp. from the Monte Hermoso Formation (Montehermosan) of Argentina. The diastema in front of the molariforms is elevated with respect to the occlusal pl ... [...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 Ameghino in 1889, the taxon was demoted to a subfamily 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 superfamily Mylodontoidea. ''Chubutherium'' is an ancestral and very plesiomorph In phylogenetics, a plesiomorphy ("near form") and symplesiomorphy are synonyms for an ancestral character shared by all m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Santa Cruz Formation
The Santa Cruz Formation is a geological formation in the Magallanes/Austral Basin in southern Patagonia in Argentina and in adjacent areas of Chile. It dates to the late Early Miocene epoch, and is contemporaneous with eponymous Santacrucian SALMA. 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 has a lithology predominantly consisting of tuffaceous deposits and fine grained sedimentary claystone and mudstone, and the upper fossil-poor Estancia La Angelina Member, which consists of sedimentary rock, primarily claystone, mudstone, and sandstone. The environment of deposition is interpreted to have been mostly fluvial, with the lowermost part of the Estancia La Costa Member being transitional between fluvial and marine conditions. The environment of the Estancia La Costa Member is thought to have been relatively warm and humid, but likely became somewhat cooler ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scelidotheriinae
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 Ameghino in 1889, the taxon was demoted to a subfamily 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 superfamily Mylodontoidea. ''Chubutherium'' is an ancestral and very plesiomorph In phylogenetics, a plesiomorphy ("near form") and symplesiomorphy are synonyms for an ancestral character shared by all ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baraguatherium
''Baraguatherium'' is an extinct genus of ground sloths of the family Mylodontidae that lived during the Early Miocene of what is now Venezuela. It dates to the Early Miocene, around 20.44 to 15.97 million years ago and represents the oldest representative of its family in the northern part of South America to date. The structure of the teeth suggests that the genus represents a rather basal form within the Mylodontidae. Unlike other mylodonts, which tended to prefer open grasslands, ''Baraguatherium'' lived in a riverine, coastal tropical rainforest. Discovery and naming The remains of ''Baraguatherium'' known to date are from the Castillo Formation, which is exposed in the Falcón Basin in northwestern Venezuela. The Falcón Basin is located in the boundary of the Caribbean to the South American Plate. An almost complete depositional sequence has been preserved here, ranging from the Eocene to the Pliocene, some of which is very rich in fossils. The most important and best k ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octodontotherium
''Octodontotherium'' is an extinct genus of ground sloth of the family Mylodontidae, endemic to South America during the Late Oligocene (Deseadan). It lived from 29 to 23 mya, existing for approximately . Fossil distribution is exclusive to Santa Cruz Province, Argentina (Deseado and Sarmiento Formations) and Bolivia ( Salla Formation). Taxonomy ''Octodontotherium'' was named by Ameghino (1894). It was assigned to Mylodontidae by Carroll (1988); and to Mylodontinae Mylodontinae is an extinct subfamily of ground sloths that lived from the Early Miocene to the Early Holocene epochs. Classification The classification of the Mylodontidae is complex and often under discussion. The most widely accepted subfamili ... by Gaudin (1995).T. J. Gaudin. 1995. The ear region of edentates and the phylogeny of Tardigrada (Mammalia, Xenarthra). Journal of Vertebrate Paleontology 15(3):672-705 References Prehistoric sloths Oligocene genus first appearances Oligocene genus extin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Octomylodon
''Octomylodon'' is an extinct genus of ground sloth of the family Mylodontidae, living during the Late Miocene (Huayquerian). Fossil remains of ''Octomylodon'' have been found uniquely in the Ituzaingó Formation, Argentina, South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout ... from 9.0 to 6.8 mya, existing for approximately .''Octomylodon'' at Fossilworks.org Taxonomy ''Octomylodon'' was assigned to Mylodontidae by Carroll (1988).R. L. Carroll. 1988. Vertebra ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urumacotherium
''Urumacotherium'' (meaning "Urumaco beast") is an extinct genus of ground sloths of the family Mylodontidae. It lived from the Middle Miocene to the Early Pliocene of what is now Brazil, Peru and Venezuela. Classification ''Urumacotherium'' is an extinct genus of the also extinct family Mylodontidae. The Mylodontidae represent a branch of the suborder of sloths (Folivora). Within this they are often grouped together with the Orophodontidae and the Scelidotheriidae in the superfamily Mylodontoidea (sometimes, however, the Scelidotheriidae and the Orophodontidae are considered only as a subfamily of the Mylodontidae).Luciano Varela, P. Sebastián Tambusso, H. Gregory McDonald und Richard A. Fariña: ''Phylogeny, Macroevolutionary Trends and Historical Biogeography of Sloths: Insights From a Bayesian Morphological Clock Analysis.'' Systematic Biology 68 (2), 2019, S. 204–218 In a classical view, based on skeletal anatomical studies, the Mylodontoidea in turn represent one of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mylodon
''Mylodon'' is a genus of extinct ground sloth belonging to the family Mylodontidae, known from the region of Patagonia in Chile and Argentina in southern South America. With a total length of 3 to 4 m, it is one of the best-known and largest representatives of the group. The oldest finds probably date to the Lower Pleistocene; however, most of the fossil remains date from the Upper Pleistocene period. One of the most important sites of this phase is the Cueva del Milodón in southern Chile. Shortly after, about 10,200 BP, ''Mylodon'' became extinct. At this point in time, it coexisted with the first human colonists in America. However, there is little evidence that it was hunted by humans. In ''Mylodons case, not only bones and teeth are known, but also various soft tissue and integumentary structures are preserved. The diet of ''Mylodon'' is known in great detail due to fossilized faeces. Its skull is greatly elongated and, compared to other large mylodontids, is narrower, posse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
