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Kermackodon
''Kermackodon'' is a genus of extinct allotherian mammaliform, known from the Middle Jurassic of England. It combines features of multituberculates with those of euharamyidans. The remains of type species, ''K. multicuspis'' were collected from Kirtlington Quarry in Oxford, England, by a team lead from UCL led by Professor Kenneth Kermack after whom the taxon is named, from sediments of the Forest Marble Formation, dating to the Bathonian In the geologic timescale the Bathonian is an age (geology), age and stage (stratigraphy), stage of the Middle Jurassic. It lasted from approximately 168.2 ±1.2 annum, Ma to around 165.3 ±1.1 Ma (million years ago). The Bathonian Age succeeds ... stage of the Middle Jurassic. The genus and species were named by Percy M. Butler and Jerry Hooker in 2005. The remains comprise a left upper molar (M2), a lower last premolar, initially considered a left but later considered more likely to be right (p4), and an incomplete non-last upper premol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euharamiyida
Euharamiyida also known as Eleutherodontida, is clade of early mammals or mammal-like cynodonts from the Middle Jurassic to Early Cretaceous of Eurasia and possibly North America. The group is sometimes considered a sister group to Multituberculata, or part of an earlier divergence within the synapsid line. It is disputed whether or not they are related to the haramiyids from the Late Triassic, such as '' Haramiyavia''. The morphology of their teeth indicates that they were herbivorous or omnivorous. Some members of the group are known to be arboreal, including gliding forms similar to modern flying squirrels or colugos. Evolution The position of euharamyidans is contested. They are either considered crown group mammals as members of Allotheria, related to multituberculates, or stem-group mammals within Mammaliaformes. The position is often dependent on the relationships of euharamiyids to the Late Triassic haramiyids such as '' Haramiyavia'' and ''Thomasia''. In some studi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Forest Marble Formation
The Forest Marble is a geological formation in England. Part of the Great Oolite Group, it dates to the late Bathonian stage of the Middle Jurassic.Weishampel, David B; et al. (2004). "Dinosaur distribution (Middle Jurassic, Europe)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 538–541. . Lithology The primary lithology of the formation typically consists of greenish grey variably calcareous silicate mudstone, with lenticular cross bedded limestone units deposited in a marine setting. Paleobiota Despite the formation being nearly entirely marine, at several localities abundant remains of terrestrial microvertebrates are found, the primary locality being the Kirtlington Mammal Bed (designated 3p) in Kirtlington Quarry near Kirtlington, Oxfordshire. Another important locality is Watton Cliff near Eype in Dorset. Fish Dinosaurs Ornithischians Saurischians Amphi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allotheria
Allotheria (meaning "other beasts", from the Ancient Greek language, Greek , '–other and , '–wild animal) is an extinct clade of mammals known from the Mesozoic and early Cenozoic. Shared characteristics of the group are the presence of lower Molar (tooth), molariform Tooth (animal), teeth equipped with longitudinal rows of cusps and enlarged incisors. Typically, the canine teeth are also lost. Allotheria includes Multituberculata, Gondwanatheria (which may be part of Multituberculata, as the sister group to Cimolodonta), and probably Haramiyida, (sometimes only including Euharamiyida) although some studies have recovered haramiyidans to be basal mammaliaforms unrelated to multituberculates. Allotherians are often placed as crown group mammals, more closely related to living marsupials and placentals (Theria) than to monotremes or Eutriconodonta, eutriconodonts, though some studies place the entirety of Allotheria outside of crown Mammalia. References Further reading Z ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multituberculata
Multituberculata (commonly known as multituberculates, named for the multiple tubercles of their teeth) is an extinct Order (biology), order of rodent-like mammals with a fossil record spanning over 130 million years. They first appeared in the Middle Jurassic, and reached a peak diversity during the Late Cretaceous and Paleocene. They eventually declined from the mid-Paleocene onwards, disappearing from the known fossil record in the late Eocene. They are the most diverse order of Mesozoic mammals with more than 200 species known, ranging from mouse-sized to beaver-sized. These species occupied a diversity of ecological niches, ranging from burrow-dwelling to squirrel-like arborealism to jerboa-like hoppers. Multituberculates are usually placed as Crown group, crown mammals outside either of the two main groups of living mammals, Theria — placentals and marsupials — and Monotremata,Agustí-Antón 2002, pp 3-4 but usually as closer to Theria than to monotremes. They are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White Limestone Formation
The White Limestone Formation is a Bathonian geologic formation in the United Kingdom, dating to the Middle Jurassic, 168.3 to 166.1 million years ago. Fossil sauropod tracks have been reported from the formation.Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607. It is the lateral equivalent of the Blisworth Limestone. It predominantly consists of grey-yellow limestone, typically wackestone and packstone with subordinate ooidal grainstone. The Woodeaton Quarry locality has yielded microvertebrates. Paleobiota For the diverse terrestrial biota of the Kirtlington Mammal Bed, which is on the boundary between the White Limestone and the Forest Marble Formation, see Forest Marble Formation#Paleobiota Dinosaurs Mammaliamorphs See also * List of dinosaur-bearing rock formations ** List of stratigraphic units with sauropodomorph tracks Prosauropods Sauropods See also List of dinosaur-bearing rock formations This list of dinosaur-bearing rock f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kirtlington Quarry
Kirtlington Quarry is a geological Site of Special Scientific Interest west of Kirtlington in Oxfordshire. It is a Geological Conservation Review site, and it is part of the Kirtlington Quarry Local Nature Reserve. Kirtlington Quarry is one of the most important Middle Jurassic vertebrate localities in the world. It dates to the Upper Bathonian, around 166 million years ago, and is part of the Forest Marble Formation. Numerous species of extinct mammal have been found. There are also fossils of theropod dinosaurs, crocodilians, pterosaur Pterosaurs are an extinct clade of flying reptiles in the order Pterosauria. They existed during most of the Mesozoic: from the Late Triassic to the end of the Cretaceous (228 million to 66 million years ago). Pterosaurs are the earli ...s, fishes and many shark teeth (a detailed list can be found at Forest Marble Formation#Paleobiota). References {{Local Nature Reserves in Oxfordshire Local nature reserves in Oxfordshire ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kenneth Kermack
Kenneth Alexander Kermack (1919 – 2000) was a British palaeontologist at University College London University College London (Trade name, branded as UCL) is a Public university, public research university in London, England. It is a Member institutions of the University of London, member institution of the Federal university, federal Uni ... most notable for his work on early mammals with his wife, Doris Mary Kermack. Among Kermack's other significant contributions was the observation that '' Diplodocus'' could not have had an aquatic lifestyle because sheer water pressure alone on its chest would have prevented it breathing whilst submerged. He first described the early mammal ''Aegialodon dawsoni'' from a molar tooth and the docodont ''Simpsonodon oxfordensis''. He was also interested in astronomy, elected a member of the British Astronomical Association on 23 February 1966, a member until his death in 2000. Selected publications * Kermack, D. M., Kermack, K ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bathonian
In the geologic timescale the Bathonian is an age (geology), age and stage (stratigraphy), stage of the Middle Jurassic. It lasted from approximately 168.2 ±1.2 annum, Ma to around 165.3 ±1.1 Ma (million years ago). The Bathonian Age succeeds the Bajocian Age and precedes the Callovian Age. Stratigraphic definitions The Bathonian Stage takes its name from Bath, Somerset, Bath, a spa town in England built on Jurassic limestone (the Latinized form of the town name is ''Bathonium''). The name was introduced in scientific literature by Belgian geologist Jean Baptiste Julien d'Omalius d'Halloy, d'Omalius d'Halloy in 1843. The original type locality (geology), type locality was located near Bath. The French palaeontologist Alcide d'Orbigny was in 1852 the first to define the exact length of the stage. The base of the Bathonian is at the first appearance of ammonite species ''Parkinsonia (ammonite), Parkinsonia (Gonolkites) convergens'' in the stratigraphic column. The global referen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Percy M
The English surname Percy is of Norman origin, coming from Normandy to England, United Kingdom. It was from the House of Percy, Norman lords of Northumberland, and derives from the village of Percy-en-Auge in Normandy. From there, it came into use as a mostly masculine and rarely feminine given name. It is also a short form of the given name Percival, Perseus, etc. People Surname * Alf Percy, Scottish footballer * Algernon Percy (other) * Charles H. Percy (1919–2011), American businessman and politician * Eileen Percy (1900–1973), Irish-born American actress * George Percy (governor) (1580–1632), English explorer, author, and colonial governor * Henry Percy (other) * Hugh Percy, 2nd Duke of Northumberland (1742–1817), British lieutenant-general in the American Revolutionary War * Isabelle Clark Percy West (1882–1976), American artist and educator *James Gilbert Percy (1921–2015), American Marine officer, flying ace and Navy Cross recipient ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Woodeaton Quarry
Woodeaton Quarry is a geological Site of Special Scientific Interest north of Oxford in Oxfordshire. It is a Geological Conservation Review site. This site exposes a sequence of rocks dating to the Middle Jurassic around 167 million years ago belonging to the Great Oolite Group, spanning the Chipping Norton Limestone, Sharp's Hill, Taynton Limestone, Rutland, White Limestone, and Forest Marble formations. It exhibits one of the most complete Bathonian sections in the county, and is described by Natural England Natural England is a non-departmental public body in the United Kingdom sponsored by the Department for Environment, Food and Rural Affairs. It is responsible for ensuring that England's natural environment, including its land, flora and fauna, ... as "of great palaeontological and sedimentological interest". References {{SSSIs Oxfordshire Sites of Special Scientific Interest in Oxfordshire Geological Conservation Review sites ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
