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Longisquama
''Longisquama'' is a genus of extinct reptile. There is only one species, ''Longisquama insignis'', known from a poorly preserved skeleton and several incomplete fossil impressions from the Middle to Late Triassic Madygen Formation in Kyrgyzstan. It is known from the type fossil specimen, slab and counterslab (PIN 2548/4 and PIN 2584/5) and five referred specimens of possible integumentary appendages (PIN 2584/7 through 9). All specimens are in the collection of the Paleontological Institute of the Russian Academy of Sciences in Moscow. ''Longisquama'' means "long scales"; the specific name ''insignis'' refers to its small size. The ''Longisquama'' holotype is notable for a number of long structures that appear to grow from its skin. The current opinion is that ''Longisquama'' is an ambiguous diapsid and has no bearing on the origin of birds. History Interpretation Researchers Haubold and Buffetaut believed that the structures were long, modified scales attached in pairs t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Longisquama BW
''Longisquama'' is a genus of extinct reptile. There is only one species, ''Longisquama insignis'', known from a poorly preserved skeleton and several incomplete fossil impressions from the Middle to Late Triassic Madygen Formation in Kyrgyzstan. It is known from the type fossil specimen, slab and counterslab (PIN 2548/4 and PIN 2584/5) and five referred specimens of possible integumentary appendages (PIN 2584/7 through 9). All specimens are in the collection of the Paleontological Institute of the Russian Academy of Sciences in Moscow. ''Longisquama'' means "long scales"; the specific name ''insignis'' refers to its small size. The ''Longisquama'' holotype is notable for a number of long structures that appear to grow from its skin. The current opinion is that ''Longisquama'' is an ambiguous diapsid and has no bearing on the origin of birds. History Interpretation Researchers Haubold and Buffetaut believed that the structures were long, modified scales attached in pairs t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Longisquama Headden Updated Skeletal
''Longisquama'' is a genus of extinct reptile. There is only one species, ''Longisquama insignis'', known from a poorly preserved skeleton and several incomplete fossil impressions from the Middle to Late Triassic Madygen Formation in Kyrgyzstan. It is known from the type fossil specimen, slab and counterslab (PIN 2548/4 and PIN 2584/5) and five referred specimens of possible integumentary appendages (PIN 2584/7 through 9). All specimens are in the collection of the Paleontological Institute of the Russian Academy of Sciences in Moscow. ''Longisquama'' means "long scales"; the specific name ''insignis'' refers to its small size. The ''Longisquama'' holotype is notable for a number of long structures that appear to grow from its skin. The current opinion is that ''Longisquama'' is an ambiguous diapsid and has no bearing on the origin of birds. History Interpretation Researchers Haubold and Buffetaut believed that the structures were long, modified scales attached in pairs t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madygen Formation
The Madygen Formation (Russian: Madygen Svita) is a Late Triassic (Carnian) geologic formation and Lagerstätte in the Batken and Osh Regions of western Kyrgyzstan, with minor outcrops in neighboring Tajikistan and Uzbekistan. The conglomerates, sandstones and mudstones of the thick formation were deposited in terrestrial lacustrine, alluvial, fluvial and deltaic environments. The formation, extending across the Fergana Valley and Fergana Range, is unique for Central Asia, as it represents one of the few known continental deposits and the Madygen Formation is renowned for the preservation of more than 20,000 fossil insects, making it one of the richest Triassic Lagerstätten in the world. Other vertebrate fossils as fish, amphibians, reptiles and synapsids have been recovered from the formation too, as well as minor fossil flora. The lake sediments of the Lagerstätte provided fossil cartilaginous fishes and their egg capsules and unusual Triassic reptiles like ''Sharovipteryx'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudosuchian
Pseudosuchia is one of two major divisions of Archosauria, including living crocodilians and all archosaurs more closely related to crocodilians than to birds. Pseudosuchians are also informally known as "crocodilian-line archosaurs". Prior to 2011, the clade Pseudosuchia was often called Crurotarsi in reference to the crurotarsal ankle found in almost all members of the group, which traditionally included phytosaurs, ornithosuchids, and suchians. However, a major 2011 study of Triassic archosaur relations proposed that phytosaurs were not closely related to other traditional "crurotarsans", at least compared to "bird-line archosaurs" (Avemetatarsalians) such as pterosaurs and dinosaurs. As a result, the possession of a crurotarsal ankle was considered a plesiomorphic ("primitive") feature retained by pseudosuchians. Crurotarsi now refers to a broader group of reptiles including Pseudosuchia, Phytosauria, and Avemetatarsalia. Despite Pseudosuchia meaning "false crocodiles", the n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Origin Of Birds
The scientific question of within which larger group of animals evolution of birds, birds evolved has traditionally been called the "origin of birds". The present scientific consensus is that birds are a group of maniraptoran Theropoda, theropod dinosaurs that evolution, originated during the Mesozoic, Mesozoic Era. A close relationship between birds and dinosaurs was first proposed in the nineteenth century after the discovery of the primitive bird ''Archaeopteryx'' in Germany. Birds and extinct non-avian dinosaurs share many unique skeletal traits. Moreover, fossils of more than thirty species of non-avian dinosaur with preserved feathers have been collected. There are even very small dinosaurs, such as ''Microraptor'' and ''Anchiornis'', which have long, Feathers#Structures and characteristics, vaned arm and leg feathers forming wings. The Jurassic basal avialan ''Pedopenna'' also shows these long foot feathers. Paleontology, Paleontologist Lawrence Witmer concluded in 2009 th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Ma (million years ago). It is preceded by the Early Triassic Epoch and followed by the Late Triassic Epoch. The Middle Triassic is divided into the Anisian and Ladinian ages or stages. Formerly the middle series in the Triassic was also known as Muschelkalk. This name is now only used for a specific unit of rock strata with approximately Middle Triassic age, found in western Europe. Middle Triassic fauna Following the Permian–Triassic extinction event, the most devastating of all mass-extinctions, life recovered slowly. In the Middle Triassic, many groups of organisms reached higher diversity again, such as the marine reptiles (e.g. ichthyosaurs, sauropterygians, thallatosaurs), ray-finned fish and many invertebrate groups like ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holotype
A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several examples, but explicitly designated as the holotype. Under the International Code of Zoological Nomenclature (ICZN), a holotype is one of several kinds of name-bearing types. In the International Code of Nomenclature for algae, fungi, and plants (ICN) and ICZN, the definitions of types are similar in intent but not identical in terminology or underlying concept. For example, the holotype for the butterfly '' Plebejus idas longinus'' is a preserved specimen of that subspecies, held by the Museum of Comparative Zoology at Harvard University. In botany, an isotype is a duplicate of the holotype, where holotype and isotypes are often pieces from the same individual plant or samples from the same gathering. A holotype is not necessarily "typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Film
{{distinguish, Carbonaceous film (paleontology) Carbon films are thin film coatings which consist predominantly of the chemical element carbon. They include plasma polymer films, amorphous carbon films ( diamond-like carbon, DLC), CVD diamond films as well as graphite films. Carbon films are produced by deposition using gas-phase deposition processes, in most cases taking place in a vacuum: chemical vapor deposition, CVD or physical vapor deposition, PVD. They are deposited in the form of thin films with film thicknesses of just a few micrometres. Carbon films make it possible to implement a large number of surface functions, especially in the field of tribology - in other words, in applications where wear Wear is the damaging, gradual removal or deformation of material at solid surfaces. Causes of wear can be mechanical (e.g., erosion) or chemical (e.g., corrosion). The study of wear and related processes is referred to as tribology. Wear in ... is a major factor. Furt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rosary
The Rosary (; la, , in the sense of "crown of roses" or "garland of roses"), also known as the Dominican Rosary, or simply the Rosary, refers to a set of prayers used primarily in the Catholic Church, and to the physical string of knots or beads used to count the component prayers. When referring to the prayer, the word is usually capitalized ("the Rosary", as is customary for other names of prayers, such as "the Lord's Prayer", and "the Hail Mary"); when referring to the prayer beads as an object, it is written with a lower-case initial letter (e.g. "a rosary bead"). The prayers that compose the Rosary are arranged in sets of ten Hail Marys, called "decades". Each decade is preceded by one Lord's Prayer ("Our Father"), and traditionally followed by one Glory Be. Some Catholics also recite the " O my Jesus" prayer after the Glory Be; it is the most well-known of the seven Fátima prayers that appeared in the early 20th century. Rosary prayer beads are an aid for saying these ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hockey Stick
A hockey stick is a piece of sports equipment used by the players in all the forms of hockey to move the ball or puck (as appropriate to the type of hockey) either to push, pull, hit, strike, flick, steer, launch or stop the ball/ puck during play with the objective being to move the ball/puck around the playing area using the stick, and then trying to score. The word "stick" is a very generic term for the equipment since the different disciplines of hockey require significant differences in both the form and the size of the stick used for it to be effective in the different sports. Field/ice/roller hockey all have a visually similar form of stick with a long shaft or handle which can be held with two hands, and a curved and flattened end; the end and curvature of these sticks are generally the most visible differences between the sticks for these sports. A modern underwater hockey stick bears little resemblance to any field/ice/roller hockey stick, since it is much smaller to ena ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Prum
Richard O. Prum (born 1961) is William Robertson Coe Professor of ornithology, and head curator of vertebrate zoology at the Peabody Museum of Natural History at Yale University. Life and work Prum describes himself as "an evolutionary ornithologist with broad interests in diverse topics," including phylogenetics, behavior, feathers, structural coloration, evolution and development, sexual selection, and historical biogeography. Prum grew up in rural Vermont and took his bachelor degree at Harvard in 1983, and received his PhD in 1989 from the University of Michigan. After gradually losing his hearing throughout the early 1990s due to illness, Prum moved from primarily doing field work to conducting research on plumage pigmentation, feather evolution, and Darwin's sexual selection theory. He released a book in 2017 on the role of beauty in natural selection: ''The Evolution of Beauty: How Darwin's Forgotten Theory of Mate Choice Shapes the Animal World – And Us''. Reception ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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