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Hylaeosaurus Fossil Illustration
''Hylaeosaurus'' ( ; Greek: / "belonging to the forest" and / "lizard") is a herbivorous ankylosaurian dinosaur that lived about 136 million years ago, in the late Valanginian stage of the early Cretaceous period of England. It was found in the Grinstead Clay Formation. ''Hylaeosaurus'' was one of the first dinosaurs to be discovered, in 1832 by Gideon Mantell. In 1842 it was one of the three dinosaurs Richard Owen based the Dinosauria on, the others being '' Iguanodon'' and '' Megalosaurus''. Four species were named in the genus, but only the type species ''Hylaeosaurus armatus'' is today considered valid. Only limited remains have been found of ''Hylaeosaurus'' and much of its anatomy is unknown. It might have been a basal nodosaurid, although a recent cladistic analysis recovers it as a basal ankylosaurid. ''Hylaeosaurus'' was about five metres long. It was an armoured dinosaur that carried at least three long spines on its shoulder. History of discovery The firs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valanginian
In the geologic timescale, the Valanginian is an age or stage of the Early or Lower Cretaceous. It spans between 139.8 ± 3.0 Ma and 132.9 ± 2.0 Ma (million years ago). The Valanginian Stage succeeds the Berriasian Stage of the Lower Cretaceous and precedes the Hauterivian Stage of the Lower Cretaceous. Stratigraphic definitions The Valanginian was first described and named by Édouard Desor in 1853. It is named after Valangin, a small town north of Neuchâtel in the Jura Mountains of Switzerland. The base of the Valanginian is at the first appearance of calpionellid species ''Calpionellites darderi'' in the stratigraphic column. A global reference section (a GSSP) had in 2009 not yet been appointed. The top of the Valanginian (the base of the Hauterivian) is at the first appearance of the ammonite genus '' Acanthodiscus''. Subdivision The Valanginian is often subdivided in Lower and Upper substages. The Upper substage begins at the first appearance of ammonite spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forest
A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' Food and Agriculture Organization (FAO) defines a forest as, "Land spanning more than 0.5 hectares with trees higher than 5 meters and a canopy cover of more than 10 percent, or trees able to reach these thresholds ''in situ''. It does not include land that is predominantly under agricultural or urban use." Using this definition, '' Global Forest Resources Assessment 2020'' (FRA 2020) found that forests covered , or approximately 31 percent of the world's land area in 2020. Forests are the predominant terrestrial ecosystem of Earth, and are found around the globe. More than half of the world's forests are found in only five countries (Brazil, Canada, China, Russia, and the United States). The largest share of forests (45 percent) are in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Edward Gray
John Edward Gray, FRS (12 February 1800 – 7 March 1875) was a British zoologist. He was the elder brother of zoologist George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray (1766–1828). The same is used for a zoological name. Gray was keeper of zoology at the British Museum in London from 1840 until Christmas 1874, before the natural history holdings were split off to the Natural History Museum. He published several catalogues of the museum collections that included comprehensive discussions of animal groups and descriptions of new species. He improved the zoological collections to make them amongst the best in the world. Biography Gray was born in Walsall, but his family soon moved to London, where Gray studied medicine. He assisted his father in writing ''The Natural Arrangement of British Plants'' (1821). After being blackballed by the Linnean Society of London, Gray shifted his interest from botany to zoology. He began his zoolog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal College Of Surgeons Of England
The Royal College of Surgeons of England (RCS England) is an independent professional body and registered charity that promotes and advances standards of surgical care for patients, and regulates surgery and dentistry in England and Wales. The College is located at Lincoln's Inn Fields in London. It publishes multiple medical journals including the '' Annals of the Royal College of Surgeons of England'', the ''Faculty Dental Journal'', and the ''Bulletin of the Royal College of Surgeons of England''. History The origins of the college date to the fourteenth century with the foundation of the "Guild of Surgeons Within the City of London". Certain sources date this as occurring in 1368. There was ongoing dispute between the surgeons and barber surgeons until an agreement was signed between them in 1493, giving the fellowship of surgeons the power of incorporation. This union was formalised further in 1540 by Henry VIII between the Worshipful Company of Barbers (incorporat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
William Clift
William Clift FRS (14 February 1775 – 20 June 1849) was a British illustrator and conservator. Early life Clift was born in Burcombe near Bodmin in Cornwall. He was the youngest of seven children and grew up in poverty following his father's early death. While attending school in Bodmin, William's talent for drawing attracted the attention of the Prior Colonel Walter Raleigh Gilbert’s wife. Mrs. Gilbert noticed Clift had a natural talent for drawing, visible through his eagerness "to come into her kitchen in Cornwall and make drawings with chalk on the floor." She soon recommended William for an apprenticeship with John Hunter, a celebrated surgeon. Clift arrived in London on 14 February 1792 and was taken on as an unpaid apprentice "to write and make drawings, to dissect and take part in the charge of the museum" which his master had established at the back of his house in Leicester Square. This arrangement continued until Hunter's death on 16 October 1793. Car ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tilgate Forest
Tilgate Forest is a Local Nature Reserve in Crawley in West Sussex. It is owned and managed by Crawley Borough Council and is part of Tilgate Park. This site has woods, tall herb and fern, and heathland. The most common trees in areas of natural woodland are birch, oak and hazel, while plantations are mainly Scots pine, red oak, western hemlock and beech. References External links {{Local Nature Reserves in West Sussex Local Nature Reserves in West Sussex Forests and woodlands of West Sussex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Benjamin Silliman
Benjamin Silliman (August 8, 1779 – November 24, 1864) was an early American chemist and science educator. He was one of the first American professors of science, at Yale College, the first person to use the process of fractional distillation in America, and a founder of the ''American Journal of Science'', the oldest continuously published scientific journal in the United States. Early life Silliman was born in a tavern in North Stratford, now Trumbull, Connecticut, to Mary (Fish) Silliman (widow of John Noyes) and General Gold Selleck Silliman. He was born in August 1779, several months after British forces took his father prisoner and his mother had fled their home in Fairfield, Connecticut, to escape 2,000 British troops who burned Fairfield center to the ground. Silliman was educated at Yale, receiving a B.A. degree in 1796 and a M.A. in 1799. He studied law with Simeon Baldwin from 1798 to 1799 and became a tutor at Yale from 1799 to 1802. He was admitted to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West Sussex
West Sussex is a county in South East England on the English Channel coast. The ceremonial county comprises the shire districts of Adur, Arun, Chichester, Horsham, and Mid Sussex, and the boroughs of Crawley and Worthing. Covering an area of 1,991 square kilometres (769 sq mi), West Sussex borders Hampshire to the west, Surrey to the north, and East Sussex to the east. The county town and only city in West Sussex is Chichester, located in the south-west of the county. This was legally formalised with the establishment of West Sussex County Council in 1889 but within the ceremonial County of Sussex. After the reorganisation of local government in 1974, the ceremonial function of the historic county of Sussex was divided into two separate counties, West Sussex and East Sussex. The existing East and West Sussex councils took control respectively, with Mid Sussex and parts of Crawley being transferred to the West Sussex administration from East Sussex. In the 2011 censu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hylaeosaurus Fossil Illustration
''Hylaeosaurus'' ( ; Greek: / "belonging to the forest" and / "lizard") is a herbivorous ankylosaurian dinosaur that lived about 136 million years ago, in the late Valanginian stage of the early Cretaceous period of England. It was found in the Grinstead Clay Formation. ''Hylaeosaurus'' was one of the first dinosaurs to be discovered, in 1832 by Gideon Mantell. In 1842 it was one of the three dinosaurs Richard Owen based the Dinosauria on, the others being '' Iguanodon'' and '' Megalosaurus''. Four species were named in the genus, but only the type species ''Hylaeosaurus armatus'' is today considered valid. Only limited remains have been found of ''Hylaeosaurus'' and much of its anatomy is unknown. It might have been a basal nodosaurid, although a recent cladistic analysis recovers it as a basal ankylosaurid. ''Hylaeosaurus'' was about five metres long. It was an armoured dinosaur that carried at least three long spines on its shoulder. History of discovery The firs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ankylosaurid
Ankylosauridae () is a family of armored dinosaurs within Ankylosauria, and is the sister group to Nodosauridae. The oldest known Ankylosaurids date to around 122 million years ago and went extinct 66 million years ago during the Cretaceous–Paleogene extinction event. These animals were mainly herbivorous and were obligate quadrupeds, with leaf-shaped teeth and robust, scute-covered bodies. Ankylosaurids possess a distinctly domed and short snout, wedge-shaped osteoderms on their skull, scutes along their torso, and a tail club. Ankylosauridae is exclusively known from the northern hemisphere, with specimens found in western North America, Europe, and East Asia. The first discoveries within this family were of the genus ''Ankylosaurus'', by Peter Kaiser and Barnum Brown in Montana in 1906. Brown went on to name Ankylosauridae and the subfamily Ankylosaurinae in 1908. Anatomy Ankylosaurids are stout, solidly built, armoured dinosaurs. They possess accessory ossifications on c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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