|
Teushentherium
''Teushentherium'' is an extinct genus of notohippid notoungulate from the Oligocene of Argentina. Fossils have been found in the Sarmiento Formation of Argentina. Etymology The genus name, ''Teushentherium'', is derived from ''Teushen'', one of the Chonan languages of the Tehuelche, and ''therion'', which is greek for "beast". The specific name refers to Camarones, a typical coastal town of Chubut Province near the Barrancas Blancas locality. Description This animal, only known from fragmentary remains, was approximately the size of a goat. Its skull was rather massive and had a short muzzle. The dentition was complete and continuous (without diastema), and the premolars and molars were high-crowned (hypsodont), like in its relative ''Rhynchippus''. The premolars had a well developed cingulum, while the molars were elongated. The shape of the premolars and molars was reminiscent to those of equids. ''Teushentherium'', like its relatives, may have had a robust body with slende ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sarmiento Formation
The Sarmiento Formation (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 deposits, which were deposited in a 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 ( notoungulates, litopterns, astrapotheres) as well as armadillo Armadillos (meaning "little armored ones" in Spanish) are New World placental mammals in the order Cingulata. The Chlamyphoridae and Dasypodidae are the only surviving families in the order, which is part of the superorder Xenarthra, al ...s, and caviomorph rodents. Material was copied from this source, which is avail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2021 In Paleomammalogy
This paleomammology list records new fossil mammal taxa that were described during the year 2021, as well as notes other significant paleomammology discoveries and events which occurred during 2021. Afrotherians Macroscelidea Proboscidea Proboscidean research * A study on changes of ecomorphological diversity of proboscideans throughout their evolutionary history is published by Cantalapiedra ''et al.'' (2021). * Revision of the fossil material of deinotheres belonging to the genus '' Prodeinotherium'' from the Miocene Vallès-Penedès Basin (Spain) is published by Gasamans ''et al.'' (2021). * A study on faunal and floral components of dung associated with juvenile mastodon remains from East Milford (Nova Scotia, Canada) dated to ~75,000 years BP, and on its implications of the knowledge of mastodon diet and environmental conditions in eastern Canada prior to the onset of the Wisconsin glaciation, is published by Cocker ''et al.'' (2021). * A study on the growth patterns ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notohippidae
Notohippidae is a paraphyletic extinct family of notoungulate mammals from South America. Notohippids are known from the Eocene and Oligocene epochs.McKenna, Malcolm C., and Bell, Susan K. 1997. ''Classification of Mammals Above the Species Level.'' Columbia University Press, New York, 631 pp. Description Although the name notohippids means "southern horses," these animals did not look like horses. The name refers to the teeth very similar to those of horses, with sharp incisors and high-crowned molars suitable for shredding grass. The shape of the skull and particularly the dentition is the result of convergent evolution with the equids, perissodactyl mammals that developed on the northern continents. The body of notohippids was rather stocky, supported by relatively elongated legs equipped with claws (and not hooves). The earliest forms of notohippids possessed low-crowned molars, but in the course of evolution the teeth gradually became more prismatic, and covered with a th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toxodontia
Toxodontia. Retrieved April 2013. is a suborder of the meridiungulate order Notoungulata. Most of the members of the five included families, including the largest notoungulates, share several dental, auditory and tarsal specializations. The group is named after ''Toxodon'', the first example of the group to be discovered by science. Description Isotemnidae, the oldest and most primitive family of toxodonts, were generally large animals with larger canines than other early notoungulates. The family is probably paraphyletic or polyphyletic since only primitive dental features unite the 12 included genera, such as a complete dentition with unreduced canines and no diastemata in the earliest genera. Likewise, they are only weakly linked to other toxodonts by a few dental features, and their primitive cheek tooth pattern can be basal to all notoungulates except notioprogonians. The oldest of the 12 genera in this family is '' Isotemnus'' known from the Riochican- Casamayoran, b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notohippidae
Notohippidae is a paraphyletic extinct family of notoungulate mammals from South America. Notohippids are known from the Eocene and Oligocene epochs.McKenna, Malcolm C., and Bell, Susan K. 1997. ''Classification of Mammals Above the Species Level.'' Columbia University Press, New York, 631 pp. Description Although the name notohippids means "southern horses," these animals did not look like horses. The name refers to the teeth very similar to those of horses, with sharp incisors and high-crowned molars suitable for shredding grass. The shape of the skull and particularly the dentition is the result of convergent evolution with the equids, perissodactyl mammals that developed on the northern continents. The body of notohippids was rather stocky, supported by relatively elongated legs equipped with claws (and not hooves). The earliest forms of notohippids possessed low-crowned molars, but in the course of evolution the teeth gradually became more prismatic, and covered with a th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligocene
The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the exact dates of the start and end of the epoch are slightly uncertain. The name Oligocene was coined in 1854 by the German paleontologist Heinrich Ernst Beyrich from his studies of marine beds in Belgium and Germany. The name comes from the Ancient Greek (''olígos'', "few") and (''kainós'', "new"), and refers to the sparsity of extant forms of molluscs. The Oligocene is preceded by the Eocene Epoch and is followed by the 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" ... Epoch. The Oligocene is the third and final epoch of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Periphragnis
''Periphragnis'' is an extinct genus of isotemnid notoungulates that lived from the Middle Eocene to the Early Oligocene in what is now Argentina and Chile. Description This animal was of robust build, with powerful, probably digitigrade legs ending in hooves. The forelegs, particularly robust, shared similarities with those of its relative ''Thomashuxleya'', but had less flattened ungulate phalanges. ''Periphragnis'' was approximately one meter and a half long, around the size of a modern boar. Its skull had a small neurocranium, and the dentition was complete and almost without any diastema. The canines were large-sized. ''Periphragnis'' had multiple similarities with ''Thomashuxleya'', but its teeth had a slightly higher crown, although still brachydont. The parastyle and paracon folds in the upper molars were less prominent, as well as less distinctly separated ; the folds of the parastyle, in the upper teeth of the jugal area, intersected with the labial metastyle of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mendozahippus
''Mendozahippus'' is an extinct genus of notohippid notoungulate which existed in Mendoza, Argentina, during the late Oligocene. Fossils are known from the site of Quebrada Fiera of the Agua de la Piedra Formation and includes a complete skull and two associated metatarsals, two maxillary fragments and five isolated upper teeth. It was first named by Esperanza Cerdeño and Bárbara Vera in 2010 File:2010 Events Collage New.png, From top left, clockwise: The 2010 Chile earthquake was one of the strongest recorded in history; The Eruption of Eyjafjallajökull in Iceland disrupts air travel in Europe; A scene from the opening ceremony of ... and the type species is ''Mendozahippus fierensis''. References Toxodonts Oligocene mammals of South America Deseadan Paleogene Argentina Fossils of Argentina Fossil taxa described in 2010 Prehistoric placental genera {{paleo-mammal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pleurostylodon
''Pleurostylodon'' is an extinct genus of notoungulate belonging to the family Isotemnidae. It lived during the Middle Eocene, in what is now Argentina. Description This genus is known from numerous remains, mainly cranial, allowing to reconstruct its morphology. It was approximately the size of a sheep, with an appearance evocating a tapir or a boar. ''Pleurostylodon'' had a large skull, widening in the orbital arch area, and narrowing in the posterior area of the muzzle, whose terminal part was enlarged and had small incisors ; there was no diastema after the canines. The muzzle was shorter than in more derived and specialized toxodonts such as ''Adinotherium'', and the occipital area was narrower. Several characteristics of its maxilla, of its teeth and of its unspecialized auditory region evocates '' Homalodotherium''. The third upper incisor was enlarged, and vaguely resembling a canine, while the canine was larger and lanceolate. The premolars and molars had an external e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomashuxleya
''Thomashuxleya'' is an extinct genus of notoungulate mammal, named after famous 19th-century biologist Thomas Huxley. Description ''Thomashuxleya'' was about in length and weighted an estimated , with a heavy body and strong limbs.D. Patterson, Bruce (€2012) ''Bones, Clones, and Biomes: The History and Geography of Recent Neotropical Mammals'' p.83 Its large skull had 44 teeth in its jaws, including large canines which may have been used to dig around in earth. It had four toes on each foot, and probably walked somewhat like a modern peccary. It was a relatively generalised animal, not specialised for any particular way of life. There's an almost complete skeleton of this animal in exhibition in the American Museum of Natural History. This skeleton was discovered during the Scarrit expedition to Patagonia, Argentina, that was led by the paleontologist George Gaylord Simpson. Fossils of ''Thomashuxleya'' have been found in the Sarmiento and Casamayor Formations of Argentin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
