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Callovosaurus
''Callovosaurus'' (meaning "Callovian lizard") is a genus of iguanodontian dinosaur known from most of a left thigh bone discovered in Middle Jurassic-age rocks of England. At times, it has been considered dubious or a valid genus of basal iguanodontian, perhaps a dryosaurid. History and description ''Callovosaurus'' is based on BMNH R1993, a nearly complete left thigh bone. This specimen was collected from the middle Callovian–age (Middle Jurassic) Peterborough Member (former Lower Oxford Clay) of the Oxford Clay Formation of Fletton, near Peterborough in Cambridgeshire, England. The bone is long, and is estimated to have belonged to an animal approximately in length. A partial shin bone from the same site or nearby, SMC J.46889, may also belong to ''Callovosaurus''. The type species, ''C. leedsi'', was first described by Richard Lydekker in 1889 as ''Camptosaurus leedsi'', the specific name honouring collector Alfred Nicholson Leeds. Aside from Charles W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Callovosaurus
''Callovosaurus'' (meaning "Callovian lizard") is a genus of iguanodontian dinosaur known from most of a left thigh bone discovered in Middle Jurassic-age rocks of England. At times, it has been considered dubious or a valid genus of basal iguanodontian, perhaps a dryosaurid. History and description ''Callovosaurus'' is based on BMNH R1993, a nearly complete left thigh bone. This specimen was collected from the middle Callovian–age (Middle Jurassic) Peterborough Member (former Lower Oxford Clay) of the Oxford Clay Formation of Fletton, near Peterborough in Cambridgeshire, England. The bone is long, and is estimated to have belonged to an animal approximately in length. A partial shin bone from the same site or nearby, SMC J.46889, may also belong to ''Callovosaurus''. The type species, ''C. leedsi'', was first described by Richard Lydekker in 1889 as ''Camptosaurus leedsi'', the specific name honouring collector Alfred Nicholson Leeds. Aside from Charles W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dryosauridae
Dryosaurids were primitive iguanodonts. They are known from Middle Jurassic to Early Cretaceous rocks of Africa, Europe, and North America. Phylogeny Until recently many dryosaurids have been regarded as dubious ('' Callovosaurus'' and '' Kangnasaurus'') or as species of the type member, ''Dryosaurus'' (''Dysalotosaurus'', '' Elrhazosaurus'' and ''Valdosaurus''). However, more recent studies redescribe these genera as valid. The cladogram A cladogram (from Greek ''clados'' "branch" and ''gramma'' "character") is a diagram used in cladistics to show relations among organisms. A cladogram is not, however, an evolutionary tree because it does not show how ancestors are related to ... below follows Paul M. Barrett, Richard J. Butler, Richard J. Twitchett and Stephen Hutt (2011). References {{Taxonbar, from=Q2505300 Iguanodonts Middle Jurassic first appearances Cretaceous extinctions Prehistoric dinosaur families Taxa named by Angela Milner Taxa named by David B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxford Clay
The Oxford Clay (or Oxford Clay Formation) is a Jurassic marine sedimentary rock formation underlying much of southeast England, from as far west as Dorset and as far north as Yorkshire. The Oxford Clay Formation dates to the Jurassic, specifically, the Callovian and Oxfordian ages, and comprises two main facies. The lower facies comprises the Peterborough Member, a fossiliferous organic-rich mudstone. This facies and its rocks are commonly known as lower Oxford Clay. The upper facies comprises the middle Oxford Clay, the Stewartby Member, and the upper Oxford Clay, the Weymouth Member. The upper facies is a fossil poor assemblage of calcareous mudstones. Oxford Clay appears at the surface around Oxford, Peterborough and Weymouth and is exposed in many quarries around these areas. The top of the Lower Oxford Clay shows a lithological change, where fissile shale changes to grey mudstone. The Middle and Upper Oxford Clays differ slightly, as they are separated by an argillaceou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camptosaurus
''Camptosaurus'' ( ) is a genus of plant-eating, beaked ornithischian dinosaurs of the Late Jurassic period of western North America and possibly also Europe. The name means 'flexible lizard' (Greek (') meaning 'bent' and (') meaning 'lizard'). Description ''Camptosaurus'' is a relatively heavily built form, with robust hindlimbs and broad feet, still having four toes. Due to the separate status of ''Uteodon'' it has become problematic which material from the Morrison Formation belongs to ''Camptosaurus''. The specimens with certainty belonging to ''Camptosaurus dispar'', from Quarry 13, have been recovered from very deep layers, probably dating to the Callovian- Oxfordian. The largest fragments from later strata indicate adult individuals more than long, and at the hips. The Quarry 13 individuals are smaller though. They have been described as reaching 6 meters (19.7 feet) in length and 785 – 874 kg in weight.Foster, J. (2007). "''Camptosaurus dispar''." ''Jura ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypsilophodont
Hypsilophodontidae (or Hypsilophodontia) is a traditionally used family of ornithopod dinosaurs, generally considered invalid today. It historically included many small bodied bipedal neornithischian taxa from around the world, and spanning from the Middle Jurassic until the Late Cretaceous. This inclusive status was supported by some phylogenetic analyses from the 1990s and mid 2000s, although there have also been many finding that the family is an unnatural grouping which should only include the type genus, ''Hypsilophodon'', with the other genera being within clades like Thescelosauridae and Elasmaria. A 2014 analysis by Norman recovered a grouping of ''Hypsilophodon'', Rhabdodontidae and ''Tenontosaurus'', which he referred to as Hypsilophodontia. All other analyses from around the same time have instead found these latter taxa to be within Iguanodontia. Linnaean usage Hypsilophodontidae was named originally in 1882 by Louis Dollo, as a family to include ''Hypsilophodon'' a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Nicholson Leeds
Alfred Nicholson Leeds (9 March 184725 August 1917) was an English amateur palaeontologist. Biography Leeds was born at Eyebury, Peterborough, the youngest of the eight children of Edward Thurlow Leeds (180251) and Eliza Mary Leeds (née Nicholson). He was educated at Warwick School. He had wanted to become a doctor, but circumstances meant that from 1868 he had to take on the management of Eyebury Farm (in The Fens, and historically attached to Peterborough Abbey) as a gentleman farmer. His elder brother Charles, a student at the University of Oxford, had been encouraged by Professor John Phillips to persevere in collecting fossils from near his home. Alfred joined him in these searches, and between them they developed better methods of disinterring, and of scientifically recording, fossils in soft clay than had been used before. (They rewarded the workmen at the clay pits (which served a brickworks in Fletton, Peterborough) for not doing so themselves, but instead sending not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1980 In Paleontology
Bryophytes Arthropods Insects Molluscs Newly named bivalves Archosauromorphs Newly named dinosaurs Data courtesy of George Olshevsky's dinosaur genera list. ''Note: the name LancangosaurusZhao, 1980. esozoic vertebrate-bearing beds and stratigraphy of northern Xinjinag: Report of Paleontological Expedition to Xinjiang IV.Memoirs of the Institute of Vertebrate Palaeontology and Palaeoanthropology, Academia Sinica A. 15, 1-119. is mistakenly treated as a nomen nudum synonymous with Datousaurus (because Dong et al. 1983 believed it to be conspecific with Datousaurus). However, it is actually an early spelling variant of another nomen nudum, Lancangjiangosaurus.'' Newly named birds Pterosauria Newly named pterosaurs Lepidosauromorphs Plesiosaurs * Plesiosaur gastroliths documented.Darby and Ojakangas (1980). Sanders, Manley, and Carpenter (2001), "Table 12.1" page 167. References {{Reflist * Darby, D. G. and Ojakangas, R. W.; 1980; Gastroliths from a Late Cretac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dryosaurus
''Dryosaurus'' ( , meaning 'tree lizard', Greek ' () meaning 'tree, oak' and () meaning 'lizard'; the name reflects the forested habitat, not a vague oak-leaf shape of its cheek teeth as is sometimes assumed) is a genus of an ornithopod dinosaur that lived in the Late Jurassic period. It was an iguanodont (formerly classified as a hypsilophodont). Fossils have been found in the western United States and were first discovered in the late 19th century. '' Valdosaurus canaliculatus'' and '' Dysalotosaurus lettowvorbecki'' were both formerly considered to represent species of ''Dryosaurus''. Description Based on known specimens, they had been estimated to have reached up to long and to have weighed up to . However, as no known adult specimens of the genus have been found, the adult size remains unknown. In 2018, the largest specimen (CM 1949) was concluded to be from another species; revising the identity of this specimen put the previous research on size and growth into question. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charles W
The F/V ''Charles W'', also known as Annie J Larsen, is a historic fishing schooner anchored in Petersburg, Alaska. At the time of its retirement in 2000, it was the oldest fishing vessel in the fishing fleet of Southeast Alaska, and the only known wooden fishing vessel in the entire state still in active service. Launched in 1907, she was first used in the halibut fisheries of Puget Sound and the Bering Sea as the ''Annie J Larsen''. In 1925 she was purchased by the Alaska Glacier Seafood Company, refitted for shrimp trawling, and renamed ''Charles W'' in honor of owner Karl Sifferman's father. The company was one of the pioneers of the local shrimp fishery, a business it began to phase out due to increasing competition in the 1970s. The ''Charles W'' was the last of the company's fleet of ships, which numbered twelve at its height. The boat was acquired in 2002 by the nonprofit Friends of the ''Charles W''. The boat was listed on the National Register of Historic Places in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peterborough
Peterborough () is a cathedral city in Cambridgeshire, east of England. It is the largest part of the City of Peterborough unitary authority district (which covers a larger area than Peterborough itself). It was part of Northamptonshire until 1974, when county boundary change meant the city became part of Cambridgeshire instead. The city is north of London, on the River Nene which flows into the North Sea to the north-east. In 2020 the built-up area subdivision had an estimated population of 179,349. In 2021 the Unitary Authority area had a population of 215,671. The local topography is flat, and in some places, the land lies below sea level, for example in parts of the Fens to the east and to the south of Peterborough. Human settlement in the area began before the Bronze Age, as can be seen at the Flag Fen archaeological site to the east of the current city centre, also with evidence of Roman occupation. The Anglo-Saxon period saw the establishment of a monastery, Medeshams ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specific Name (zoology)
In zoological nomenclature, the specific name (also specific epithet or species epithet) is the second part (the second name) within the scientific name of a species (a binomen). The first part of the name of a species is the name of the genus or the generic name. The rules and regulations governing the giving of a new species name are explained in the article species description. For example, the scientific name for humans is ''Homo sapiens'', which is the species name, consisting of two names: ''Homo'' is the " generic name" (the name of the genus) and ''sapiens'' is the "specific name". Historically, ''specific name'' referred to the combination of what are now called the generic and specific names. Carl Linnaeus, who formalized binomial nomenclature, made explicit distinctions between specific, generic, and trivial names. The generic name was that of the genus, the first in the binomial, the trivial name was the second name in the binomial, and the specific the proper term for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
