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Coronodon
''Coronodon'' is a genus of toothed mysticetes from the Early Oligocene Ashley Formation of South Carolina. Description It was about the same size as ''Dorudon'', measuring long and weighing . The rostrum of ''Coronodon'' is wide, judging by its straight sides and short mandibular symphysis. Despite being similar to some archaeocetes in having a rostrum that is twisted counterclockwise in anterior view, it differs in having posterior teeth with subequal cusps and an upturned anterior process of the maxilla. ''Coronodon'' differs from other toothed mysticetes in having anterior lower molars labially overlapping posterior lower molars. * Phylogeny ''Coronodon'' falls basally within Mysticeti, being closely related to the unnamed taxon ChM PV 5720 and more primitive than ''" Metasqualodon" symmetricus'', Aetiocetidae, Mammalodontidae, and ''Llanocetus ''Llanocetus'' ( "Llano's whale" ) is a genus of extinct toothed baleen whales from the Late Eocene of Antarctica. The type sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mace Brown Museum Of Natural History
The Mace Brown Museum of Natural History is a public natural history museum located on the campus of The College of Charleston, a public liberal arts college in Charleston, South Carolina. The museum has more than 30,000 vertebrate and invertebrate fossils. The collection's focus is on the paleontology of the South Carolina Lowcountry. The collection and exhibits showcase extensive fossils of late Cretaceous through Pliocene and Pleistocene marine vertebrates (sharks, rays, chimaeras, fish, marine reptiles, marine mammals) from the southeastern USA, Paleozoic and Mesozoic invertebrates and vertebrates, Mesozoic and Cenozoic fossil plants, Eocene and Oligocene land mammals from the great plains, ice age mammals, and dinosaurs. It is also a world-class collection of Oligocene cetacean fossils. The museum provides insight into the early evolution of whales and dolphins, right at the time that mysticete and odontocete whales split and echolocation evolved. The museum has the h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ashley Formation
The Ashley Formation is a geologic formation in South Carolina. It preserves fossils dating back to the Paleogene period. Vertebrate fauna Mammals Reptiles Fish Cartilaginous fish Bony fish See also * List of fossiliferous stratigraphic units in South Carolina * Paleontology in South Carolina The location of the state of South Carolina Paleontology in South Carolina refers to paleontological research occurring within or conducted by people from the U.S. state of South Carolina. Evidence suggests that at least part of South Carolina ... References * Paleogene geology of South Carolina {{SouthCarolina-geologic-formation-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aetiocetidae
Aetiocetidae is an extinct family of toothed baleen whales known from the Oligocene. The whales are from the North Pacific Ocean and ranged in size from long. Many of the described specimens were discovered from the Upper Oligocene of the Japanese Morawan Formation, the largest known one from the Morawan's Upper tuffaceous siltstone. Other formally described extinct toothed mysticetis from this time are smaller, from in length. Mysticeti with true baleen are seen in fossils from the Upper Oligocene. The monophyly of the family is still uncertain, as are the evolutionary relationship between the early toothed baleen whales (Aetiocetidae, Mammalodontidae, and Llanocetidae) and the early and extant edentulous baleen whales. However, the cladistic analyses of ''Coronodon'' and ''Mystacodon ''Mystacodon'' is a genus of toothed baleen whale from the Late Eocene Yumaque Formation of the Pisco Basin in southwestern Peru. It is the oldest known baleen whale, and was probably a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baleen Whale
Baleen whales ( systematic name Mysticeti), also known as whalebone whales, are a parvorder of carnivorous marine mammals of the infraorder Cetacea ( whales, dolphins and porpoises) which use keratinaceous baleen plates (or "whalebone") in their mouths to sieve planktonic creatures from the water. Mysticeti comprises the families Balaenidae (right and bowhead whales), Balaenopteridae ( rorquals and the gray whale), and Cetotheriidae (the pygmy right whale). There are currently 16 species of baleen whales. While cetaceans were historically thought to have descended from mesonychids, molecular evidence instead supports them as a clade of even-toed ungulates (Artiodactyla). Baleen whales split from toothed whales (Odontoceti) around 34 million years ago. Baleen whales range in size from the and pygmy right whale to the and blue whale, the largest known animal to have ever existed. They are sexually dimorphic. Baleen whales can have streamlined or large bodies, de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rupelian
The Rupelian is, in the geologic timescale, the older of two ages or the lower of two stages of the Oligocene Epoch/ Series. It spans the time between . It is preceded by the Priabonian Stage (part of the Eocene) and is followed by the Chattian Stage. Name The stage is named after the small river Rupel in Belgium, a tributary to the Scheldt. The Belgian Rupel Group derives its name from the same source. The name Rupelian was introduced in scientific literature by Belgian geologist André Hubert Dumont in 1850. The separation between the group and the stage was made in the second half of the 20th century, when stratigraphers saw the need to distinguish between lithostratigraphic and chronostratigraphic names. Stratigraphic definition The base of the Rupelian Stage (which is also the base of the Oligocene Series) is at the extinction of the foraminiferan genus '' Hantkenina''. An official GSSP for the base of the Rupelian has been assigned in 1992 ( Massignano, Italy). The ... [...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] |
South Carolina
)'' Animis opibusque parati'' ( for, , Latin, Prepared in mind and resources, links=no) , anthem = "Carolina";" South Carolina On My Mind" , Former = Province of South Carolina , seat = Columbia , LargestCity = Charleston , LargestMetro = Greenville (combined and metro)Columbia (urban) , BorderingStates = Georgia, North Carolina , OfficialLang = English , population_demonym = List of U.S. state residents names, South Carolinian , Governor = , Lieutenant Governor = , Legislature = South Carolina General Assembly, General Assembly , Upperhouse = South Carolina Senate, Senate , Lowerhouse = South Carolina House of Representatives, House of Representatives , Judiciary = South Carolina Supreme Court , Senators = , Representative = 6 Republicans1 Democrat , postal_code = SC , TradAbbreviation = S.C. , area_rank = 40th , area_total_sq_mi = 32,020 , area_total_km2 = 82,932 , area_land_sq_mi = 30,109 , area_land_km2 = 77,982 , area_water_sq_mi = 1,911 , area_wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorudon
''Dorudon'' ("spear-tooth") is a genus of extinct basilosaurid ancient whales that lived alongside '' Basilosaurus'' 40.4 to 33.9 million years ago in the Eocene. It was a small whale, with ''D. atrox'' measuring long and weighing . ''Dorudon'' lived in warm seas around the world and fed on small fish and mollusks. Fossils have been found along the former shorelines of the Tethys Sea in present-day Egypt and Pakistan, as well as in the United States, New Zealand, and Western Sahara. Taxonomic history described ''Dorudon serratus'' based on a fragmentary maxilla and a few teeth found in South Carolina. He concluded that the teeth must have belonged to a mammal since they were two-rooted, that they must have been teeth from a juvenile since they were hollow, and also noted their similarity to the teeth then described for ''Zeuglodon'' ('' Basilosaurus''). When exploring the type locality, Gibbes discovered a lower jaw and twelve caudal vertebrae, which he felt obliged to assi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammalodontidae
Mammalodontidae is a family of extinct whales known from the Oligocene of Australia and New Zealand. There are currently two genera in this family: ''Janjucetus'' and ''Mammalodon''. After a new cladistic analysis by Fitzgerald (2010), ''Janjucetus'' was transferred into Mammalodontidae, thereby making Janjucetidae a junior synonym of Mammalodontidae. Analysing the jaw morphology of the toothed mysticetes, found eight mandibular characters unique to the members of Mammalodontidae: * the mandibular symphysis is short, has a rugose joint surface, but lacks a symphyseal groove. In archaeocetes the symphysis is long. In modern mysticetes, in contrast, the symphysis is very small, its joint surfaces are smooth, and there is a groove on the interior side of the mandible that accommodates the symphyseal ligament which enables them to open their mouth wide. * the external foramina on the mandible are relatively large (smaller or absent in later mysticetes) * the postcanines sit in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Llanocetus
''Llanocetus'' ( "Llano's whale" ) is a genus of extinct toothed baleen whales from the Late Eocene of Antarctica. The type species, ''Llanocetus denticrenatus'', reached gigantic proportions, with the juvenile specimen reaching an estimated in length; a second, unnamed species, known only from three isolated premolar teeth, reached an estimated total body length of up to . Like other contemporary baleen whales of the Eocene, ''Llanocetus'' completely lacked baleen in its jaws. It was probably a suction feeder like the modern beaked and pygmy right whales. History ''Llanocetus'' was described in 1989 by paleontologist Edward Mitchell based on a partial mandible with two teeth, specimen USNM 183022, and an endocast of the braincase, referred to the same specimen, from the La Meseta Formation of Seymour Island, Antarctica. They were excavated in 1974-75 by a joint team from the Instituto Antártico Argentino, Ohio State University and Northern Illinois University. The comple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prehistoric Cetacean Genera
Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The use of symbols, marks, and images appears very early among humans, but the earliest known writing systems appeared 5000 years ago. It took thousands of years for writing systems to be widely adopted, with writing spreading to almost all cultures by the 19th century. The end of prehistory therefore came at very different times in different places, and the term is less often used in discussing societies where prehistory ended relatively recently. In the early Bronze Age, Sumer in Mesopotamia, the Indus Valley Civilisation, and ancient Egypt were the first civilizations to develop their own scripts and to keep historical records, with their neighbors following. Most other civilizations reached the end of prehistory during the following Iron Ag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
