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Kritosaurus Navajovius
''Kritosaurus'' is an incompletely known genus of hadrosaurid (duck-billed) dinosaur. It lived about 74.5-66 million years ago, in the Late Cretaceous of North America. The name means "separated lizard" (referring to the arrangement of the cheek bones in an incomplete type skull), but is often mistranslated as "noble lizard" in reference to the presumed "Roman nose" (in the original specimen, the nasal region was fragmented and disarticulated, and was originally restored flat). History of discovery In 1904, Barnum Brown discovered the type specimen (AMNH 5799) of ''Kritosaurus'' near the Ojo Alamo Formation, San Juan County, New Mexico, United States, while following up on a previous expedition. He initially could not definitely correlate the stratigraphy, but by 1916 was able to establish it as from what is now known as the late Campanian-age De-na-zin Member of the Kirtland Formation. When discovered, much of the front of the skull had either eroded or fragmented, and Brown r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Cretaceous
The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the Latin word for the white limestone known as chalk. The chalk of northern France and the white cliffs of south-eastern England date from the Cretaceous Period. Climate During the Late Cretaceous, the climate was warmer than present, although throughout the period a cooling trend is evident. The tropics became restricted to equatorial regions and northern latitudes experienced markedly more seasonal climatic conditions. Geography Due to plate tectonics, the Americas were gradually moving westward, causing the Atlantic Ocean to expand. The Western Interior Seaway divided North America into eastern and western halves; Appalachia and Laramidia. India maintained a northward course towards Asia. In the Southern Hemisphere, Aus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Mexico
New Mexico is a state in the Southwestern United States, Southwestern region of the United States. It is one of the Mountain States of the southern Rocky Mountains, sharing the Four Corners region with Utah, Colorado, and Arizona. It also borders the state of Texas to the east and southeast, Oklahoma to the northeast, and shares Mexico-United States border, an international border with the Mexican states of Chihuahua (state), Chihuahua and Sonora to the south. New Mexico's largest city is Albuquerque, and its List of capitals in the United States, state capital is Santa Fe, New Mexico, Santa Fe, the oldest state capital in the U.S., founded in 1610 as the government seat of Santa Fe de Nuevo México, Nuevo México in New Spain. It also has the highest elevation of any state capital, at . New Mexico is the List of U.S. states and territories by area, fifth-largest of the fifty states by area, but with just over 2.1 million residents, ranks List of U.S. states and terri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Swann Lull
Richard Swann Lull (November 6, 1867 – April 22, 1957) was an American paleontologist and Sterling Professor at Yale University who is largely remembered for championing a non-Darwinian view of evolution, whereby mutation(s) could unlock presumed "genetic drives" that, over time, would lead populations to increasingly extreme phenotypes (and perhaps, ultimately, to extinction). Life Lull was born in Annapolis, Maryland, the son of naval officer Edward Phelps Lull and Elizabeth Burton, daughter of General Henry Burton. He married Clara Coles Boggs, and he has a daughter, Dorothy. He majored in zoology at Rutgers College, where he received both his undergraduate and master's degrees (M.S. 1896). He worked for the Division of Entomology of the United States Department of Agriculture but in 1894 became an assistant professor of zoology at the State Agricultural College in Amherst, Massachusetts (now the University of Massachusetts Amherst). Lull's interest in fossil footprint ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kritosaurus Incurvimanus
''Gryposaurus'' (meaning "hooked-nosed (Greek ''grypos'') lizard"; sometimes incorrectly translated as "griffin (Latin ''gryphus'') lizard") was a genus of duckbilled dinosaur that lived about 80 to 75 million years ago, in the Late Cretaceous (late Santonian to late Campanian stages) of North America. Named species of ''Gryposaurus'' are known from the Dinosaur Park Formation in Alberta, Canada, and two formations in the United States: the Lower Two Medicine Formation in Montana and the Kaiparowits Formation of Utah. A possible additional species from the Javelina Formation in Texas may extend the temporal range of the genus to 66 million years ago. ''Gryposaurus'' is similar to ''Kritosaurus'', and for many years the two were thought to be synonyms. It is known from numerous skulls, some skeletons, and even some skin impressions that show it to have had pyramidal scales projecting along the midline of the back. It is most easily distinguished from other duckbills by its narro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canada
Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of countries and dependencies by area, second-largest country by total area, with the List of countries by length of coastline, world's longest coastline. Its Canada–United States border, border with the United States is the world's longest international land border. The country is characterized by a wide range of both Temperature in Canada, meteorologic and Geography of Canada, geological regions. With Population of Canada, a population of over 41million people, it has widely varying population densities, with the majority residing in List of the largest population centres in Canada, urban areas and large areas of the country being sparsely populated. Canada's capital is Ottawa and List of census metropolitan areas and agglomerations in Canada, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Parks (paleontologist)
William Arthur Parks (11 December 1868 – 3 October 1936) was a Canadian geologist and paleontologist, following in the tradition of Lawrence Lambe. Parks was born in Hamilton, Ontario. After graduating with a Bachelor of Arts in 1892, Parks joined the University of Toronto's staff, where he taught geology, paleontology, and mineralogy. He went on to earn a Doctor of Philosophy, PhD in 1900. He wrote 80 scientific papers in his lifetime. Parks died in Toronto, Toronto, Ontario, in 1936. Named taxa * 1919 ''Kritosaurus incurvimanus'' * 1922 ''Parasaurolophus walkeri'' * 1923 ''Corythosaurus intermedius'' * 1923 ''Lambeosaurus lambei'' * 1924 ''Dyoplosaurus acutosquameus'' * 1925 ''Arrhinoceratops brachyops'' * 1925 ''Neomeryx finni'' * 1926 ''Struthiomimus brevitertius'' (type species of ''Dromiceiomimus'') * 1926 ''Parksosaurus, Thescelosaurus warreni'' (type species of ''Parksosaurus''). * 1928 ''Struthiomimus samueli'' * 1928 ''Albertosaurus arctunguis'' * 1931 ''Tetragonos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles Whitney Gilmore
Charles Whitney Gilmore (March 11, 1874 – September 27, 1945) was an American paleontologist who gained renown in the early 20th century for his work on vertebrate fossils during his career at the United States National Museum (now the National Museum of Natural History). Gilmore named many dinosaurs in North America and Mongolia, including the Cretaceous sauropod ''Alamosaurus'', ''Alectrosaurus'', '' Archaeornithomimus'', ''Bactrosaurus'', '' Brachyceratops'', ''Chirostenotes'', '' Mongolosaurus'', '' Parrosaurus'', ''Pinacosaurus'', ''Styracosaurus ovatus'' (now '' Rubeosaurus'') and ''Thescelosaurus''. Career Gilmore was working as a paleontologist for the Carnegie Museum of Natural History in 1901 when he found the skeleton of a young sauropod, which was classified the following year as an ''Apatosaurus''. In 1903 Gilmore was hired by the United States National Museum (now the National Museum of Natural History), part of the Smithsonian Institution. His first assign ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nasal Bone
The nasal bones are two small oblong bones, varying in size and form in different individuals; they are placed side by side at the middle and upper part of the face and by their junction, form the bridge of the upper one third of the nose. Each has two surfaces and four borders. Structure There is heavy variation in the structure of the nasal bones, accounting for the differences in sizes and shapes of the nose seen across different people. Angles, shapes, and configurations of both the bone and cartilage are heavily varied between individuals. Broadly, most nasal bones can be categorized as "V-shaped" or "S-shaped" but these are not scientific or medical categorizations. When viewing anatomical drawings of these bones, consider that they are unlikely to be accurate for a majority of people. The two nasal bones are joined at the midline internasal suture and make up the bridge of the nose. Surfaces The ''outer surface'' is concavo-convex from above downward, convex from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jan Versluys
Jan Versluys (1 September 1873 in Groningen – 22 January 1939 in Vienna) was a Dutch zoologist. He studied biology at the University of Amsterdam, and afterwards participated on a scientific voyage to the Caribbean aboard the vessel ''Chazalie''. In 1898 he obtained his doctorate from the University of Giessen, then in 1899/1900 served as an assistant to Max Carl Wilhelm Weber on the Siboga Expedition to the Netherlands East Indies. As a result of the mission, he published a monograph on Gorgonians, titled "''Die Gorgoniden der Siboga-Expedition''". Later on in his career, he worked as a professor of zoology at the universities of University of Ghent, Ghent (from 1916) and University of Vienna, Vienna (from 1925). Versluys is known to have corresponded with, and had visited American paleontologist Barnum Brown in 1904. Taxa with the epithet of ''versluysi'' commemorate his name, an example being the amphipod subspecies ''Niphargus longicaudatus versluysi''. Selected works ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nectosaurus
''Nectosaurus'' is a genus of thalattosaur (marine diapsid Reptile, reptiles) which lived during the Late Triassic in what is now California. The type species, type and only known species, ''Nectosaurus halius'', was found in the Hosselkus Limestone and described by John C. Merriam in 1905, making it one of the first thalattosaurians known (along with ''Thalattosaurus'').Sepkoski, J.J. (2002). "A compendium of fossil marine animal genera". ''Bulletins of American Paleontology'' 363: 1-560. Discovery ''Nectosaurus'' is known from fragmentary remains. The holotype, UCMP 9124, is an incomplete skeleton including vertebrae, a humerus, coracoid, ulna, Radius (bone), radius, and partial skull and mandibles. Many isolated bones from other localities were referred to the genus by Merriam in 1908. In addition, a partial skull from the same locality, UCMP 9120, was referred to the genus as ''Nectosaurus sp.'' in 1905. This specimen is much larger than any specimen of ''Nectosaurus haliu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edmontosaurus
''Edmontosaurus'' ( ) (meaning "lizard from Edmonton"), with the second species often colloquially and historically known as ''Anatosaurus'' or ''Anatotitan'' (meaning "duck lizard" and "giant duck"), is a genus of hadrosaurid (duck-billed) dinosaur. It contains two known species: ''Edmontosaurus regalis'' and ''Edmontosaurus annectens''. Fossils of ''E. regalis'' have been found in rocks of western North America that date from the late Campanian Stage (stratigraphy), age of the Cretaceous Period (geology), period 73 million years ago, while those of ''E. annectens'' were found in the same geographic region from rocks dated to the end of the Maastrichtian age, 66 million years ago. ''Edmontosaurus'' was one of the last non-bird, avian dinosaurs ever to exist, and lived alongside dinosaurs like ''Triceratops'', ''Tyrannosaurus'', ''Ankylosaurus'', and ''Pachycephalosaurus'' shortly before the Cretaceous–Paleogene extinction event. ''Edmontosaurus'' included two of the lar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kirtland Formation
The Kirtland Formation (originally the Kirtland Shale) is a Sedimentary rock, sedimentary geological formation. Description The Kirtland Formation is the product of alluvial muds and overbank sand deposits from the many channels draining the coastal plain that existed on the Cretaceous Interior Seaway, inland seashore of North America, in the late Cretaceous period. It overlies the Fruitland Formation. It is found in the San Juan Basin in the states of New Mexico and Colorado, in the United States of America. The base of the Kirtland Formation and its lowest sub-unit, the Hunter Wash member, has been dated to 75.02 ± 0.13 Ma. Together with the upper part of the underlying Fruitland Formation, this contains fossils representing the Hunter Wash local fauna. The border between the Hunter Wash member and overlying Farmington member dates to approximately 74 million years ago. The top of the Farmington member and bottom of the overlying De-na-zin member has been radiometrically da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
