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Lucianosaurus
''Lucianosaurus'' is an extinct genus of amniote of unknown affinities, known only from teeth. Initially described as a basal ornithischian dinosaur, subsequently reclassified as a member of the clade Archosauriformes of uncertain phylogenetic placementIrmis, R.B., Parker, W.G., Nesbitt, S.J., and Liu, J. (2006). Early ornithischian dinosaurs: the Triassic record. ''Historical Biology'' 19(1):3-22. and later, taking into account the similarity of its teeth to the teeth of traversodontid cynodonts such as '' Dadadon'' (shared presence of teeth with sub-triangular crowns, enlarged denticles, and thecodont tooth implantation), as an amniote of uncertain affinities (though based on dissimilarities in gross morphology and geographic separation it is still more likely that the taxon is indeed an archosauriform rather than a traversodontid). Fossil remains of Lucianosaurus were first found in Late Triassic strata in Eastern New Mexico, United States.Hunt, A.P. and Lucas, S.G. 1994. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1994 In Paleontology
Plants Conifers Angiosperms Arthropods Insects Molluscs Bivalves Fishes Newly named bony fishes Archosauromorphs * Aff. Rebbachisaurus gastroliths documented.Calvo (1994). Sanders, Manley, and Carpenter (2001), "Table 12.1" page 167. * The "Talkeetna Mountains Hadrosaur" specimen was discovered in a quarry being excavated for road material. The quarry is near the Glenn Highway, approximately 150 miles northeast of Anchorage. That fall, excavation began, and was resumed in the summer of 1996. Newly named pseudosuchians Newly named basal dinosauromorphs Newly named dinosaurs Data courtesy of George Olshevsky's dinosaur genera list. Birds Plesiosaurs * Plesiosaur gastroliths documented.Martin (1994). Sanders, Manley, and Carpenter (2001), "Table 12.1" page 167. New taxa Pterosaurs New taxa Other diapsids New taxa Footnotes {{Reflist, , refs= "Introduction," in Pasche and May (2001); page 220. "Location and Geologic Setting," in Pasche and May (2001) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern New Mexico
Eastern New Mexico is a physiographic subregion within the U.S. state of New Mexico. The region is sometimes called the "High Plains," or "Eastern Plains (of New Mexico)," and was historically referred to as part of the "Great American Desert". The region is largely coterminous with the portion of the Llano Estacado in New Mexico. Portions of Eastern New Mexico's elevation extends to over . The region is characterized by flat, largely-featureless terrain with the exception of the Pecos River valley and the abrupt breaks along the Mescalero Ridge and northern caprock escarpments of the Llano Estacado. The region typically lacks the high relief of central and northern New Mexico, such as that in the Sangre de Cristo and Sandia mountain ranges. The climate is semi-arid with hot summers and is characterized by significant wind and dust storms in the springtime. Like much of the Llano Estacado region, Eastern New Mexico is largely rural and agricultural, and resembles West Texas in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Triassic
The Late Triassic is the third and final epoch (geology), epoch of the Triassic geologic time scale, Period in the geologic time scale, spanning the time between annum, Ma and Ma (million years ago). It is preceded by the Middle Triassic Epoch and followed by the Early Jurassic Epoch. The corresponding series (stratigraphy), series of rock beds is known as the Upper Triassic. The Late Triassic is divided into the Carnian, Norian and Rhaetian Geologic time scale, Ages. Many of the first dinosaurs evolved during the Late Triassic, including ''Plateosaurus'', ''Coelophysis'', and ''Eoraptor''. The Triassic–Jurassic extinction event began during this epoch and is one of the five major mass extinction events of the Earth. Etymology The Triassic was named in 1834 by Friedrich August von Namoh, Friedrich von Alberti, after a succession of three distinct rock layers (Greek meaning 'triad') that are widespread in southern Germany: the lower Buntsandstein (colourful sandstone'')'', t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quay County, New Mexico
Quay County () is a county in the state of New Mexico. As of the 2010 census, the population was 9,041. Its county seat is Tucumcari. The county was named for Pennsylvania senator Matthew Quay, who supported statehood for New Mexico. Its eastern border is the Texas state line, approximately 103.04 degrees west longitude. Geography According to the U.S. Census Bureau, the county has a total area of , of which is land and (0.3%) is water. Adjacent counties * Union County - north * Harding County - northwest * San Miguel County - west * Guadalupe County - west * De Baca County - southwest * Roosevelt County - south * Curry County - south * Deaf Smith County, Texas - southeast * Oldham County, Texas - east * Hartley County, Texas - northeast Demographics 2000 census As of the 2000 census, there were 10,155 people, 4,201 households, and 2,844 families living in the county. The population density was 4 people per square mile (1/km2). There were 5,664 housing units at a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guadalupe County, New Mexico
Guadalupe County ( es, Condado de Guadalupe) is a county in the U.S. state of New Mexico. As of the 2010 census, the population was 4,687, making it the fifth-least populous county in New Mexico. Its county seat is Santa Rosa. History Guadalupe County was named after ''Nuestra Señora de Guadalupe'' (Our Lady of Guadalupe) or after the ''Mesita de Guadalupe'' (Guadalupe Plain). The county was created from the southern portion of San Miguel County February 26, 1891 by an act of the New Mexico Territorial Legislature. The original county seat was Puerto De Luna, but was moved north to Santa Rosa in 1903. That same year, after the popular Spanish–American War of 1898, the county's name was changed to Leonard Wood County after the Presidential physician, Major-General in the Rough Riders, and winner of the Medal of Honor. The name was later changed back to Guadalupe County. The County contains whole, or parts of, several previous Spanish land grants to include the Aqua Negra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine Minor Outlying Islands, and 326 Indian reservations. The United States is also in free association with three Pacific Island sovereign states: the Federated States of Micronesia, the Marshall Islands, and the Republic of Palau. It is the world's third-largest country by both land and total area. It shares land borders with Canada to its north and with Mexico to its south and has maritime borders with the Bahamas, Cuba, Russia, and other nations. With a population of over 333 million, it is the most populous country in the Americas and the third most populous in the world. The national capital of the United States is Washington, D.C. and its most populous city and principal financial center is New York City. Paleo-Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dadadon
''Dadadon'' is an extinct genus of traversodontid cynodonts which existed in Madagascar during the late Middle Triassic In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided in chronostratigraphy. The Middle Triassic spans the time between Ma and .... The only species in the genus is ''Dadadon isaloi''. References Traversodontids Prehistoric cynodont genera Prehistoric animals of Madagascar Triassic Madagascar Middle Triassic synapsids of Africa Fossil taxa described in 2000 {{paleo-therapsid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cynodont
The cynodonts () (clade Cynodontia) are a clade of eutheriodont therapsids that first appeared in the Late Permian (approximately 260 mya), and extensively diversified after the Permian–Triassic extinction event. Cynodonts had a wide variety of lifestyles, including carnivory and herbivory. Mammals are cynodonts, as are their extinct ancestors and close relatives, having evolved from advanced probainognathian cynodonts during the Late Triassic. All other cynodont lines went extinct, with the last known non-mammalian cynodont group, the Tritylodontidae, having its youngest records in the Early Cretaceous. Description Early cynodonts have many of the skeletal characteristics of mammals. The teeth were fully differentiated and the braincase bulged at the back of the head. Outside of some crown-group mammals (notably the therians), all cynodonts probably laid eggs. The temporal fenestrae were much larger than those of their ancestors, and the widening of the zygomatic arch in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archosauriformes
Archosauriformes (Greek for 'ruling lizards', and Latin for 'form') is a clade of diapsid reptiles that developed from archosauromorph ancestors some time in the Latest Permian (roughly 252 million years ago). It was defined by Jacques Gauthier (1994) as the clade stemming from the last common ancestor of Proterosuchidae and Archosauria (the group that contains crocodiles, pterosaurs and dinosaurs bird.html"_;"title="ncluding_bird">ncluding_birds;_Phil_Senter.html" ;"title="bird">ncluding_birds.html" ;"title="bird.html" ;"title="ncluding bird">ncluding birds">bird.html" ;"title="ncluding bird">ncluding birds; Phil Senter">bird">ncluding_birds.html" ;"title="bird.html" ;"title="ncluding bird">ncluding birds">bird.html" ;"title="ncluding bird">ncluding birds; Phil Senter (2005) defined it as the most exclusive clade containing ''Proterosuchus'' and Archosauria. These reptiles, which include members of the Family (biology), family Proterosuchidae and more advanced forms, were ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traversodontidae
Traversodontidae is an extinct family of herbivorous cynodonts. Traversodonts were primarily Gondwanan, with many species known from Africa and South America. Recently, traversodonts have also been found from Europe and eastern North America. Traversodonts first appeared in the Middle Triassic and diversified in the Late Triassic before going extinct at the end of the epoch. The family Traversodontidae was erected by Friedrich von Huene in 1936 for cynodonts first found in São Pedro do Sul in Paleorrota, Brazil. Description Traversodonts are members of Gomphodontia, a group of herbivorous cynognathian cynodonts. As an adaptation toward eating plants, they have wide postcanine teeth behind large canines. These postcanines are closely spaced with their crowns touching each other. Each is usually wider than it is long and is covered in several cusps. Because of their complexity, postcanine teeth are the primary means of identifying and distinguishing different species of traverso ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinosaur
Dinosaurs are a diverse group of reptiles of the clade Dinosauria. They first appeared during the Triassic period, between 243 and 233.23 million years ago (mya), although the exact origin and timing of the evolution of dinosaurs is the subject of active research. They became the dominant terrestrial vertebrates after the Triassic–Jurassic extinction event 201.3 mya; their dominance continued throughout the Jurassic and Cretaceous periods. The fossil record shows that birds are feathered dinosaurs, having evolved from earlier theropods during the Late Jurassic epoch, and are the only dinosaur lineage known to have survived the Cretaceous–Paleogene extinction event approximately 66 mya. Dinosaurs can therefore be divided into avian dinosaurs—birds—and the extinct non-avian dinosaurs, which are all dinosaurs other than birds. Dinosaurs are varied from taxonomic, morphological and ecological standpoints. Birds, at over 10,700 living species, are among ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ornithischian
Ornithischia () is an extinct order of mainly herbivorous dinosaurs characterized by a pelvic structure superficially similar to that of birds. The name ''Ornithischia'', or "bird-hipped", reflects this similarity and is derived from the Greek stem ' (), meaning "of a bird", and ' (), plural ', meaning "hip joint". However, birds are only distantly related to this group as birds are theropod dinosaurs. Ornithischians with well known anatomical adaptations include the ceratopsians or "horn-faced" dinosaurs (e.g. ''Triceratops''), the pachycephalosaurs or "thick-headed" dinosaurs, the armored dinosaurs (Thyreophora) such as stegosaurs and ankylosaurs, and the ornithopods. There is strong evidence that certain groups of ornithischians lived in herds, often segregated by age group, with juveniles forming their own flocks separate from adults. Some were at least partially covered in filamentous (hair- or feather- like) pelts, and there is much debate over whether these filaments foun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
