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Adelospondyls
Adelospondyli is an order of elongated, presumably aquatic, Carboniferous amphibians (''sensu lato''). They have a robust skull roofed with solid bone, and orbits located towards the front of the skull. The limbs were almost certainly absent, although some historical sources reported them to be present. Despite the likely absence of limbs, adelospondyls retained a large part of the bony shoulder girdle. Adelospondyls have been assigned to a variety of groups in the past. They have traditionally been seen as members of the subclass Lepospondyli, related to other unusual early tetrapods such as " microsaurs", " nectrideans", and aïstopods. Analyses such as Ruta & Coates (2007) have offered an alternate classification scheme, arguing that adelospondyls were actually far removed from other lepospondyls, instead being stem-tetrapod stegocephalians closely related to the family Colosteidae. Most adelospondyls belong to the family Adelogyrinidae, and prior to 2003 the order and famil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acherontiscus Skeletal
''Acherontiscus'' is an extinct genus of stegocephalians that lived in the Early Carboniferous ( Mississippian era) of Scotland. The type and only species is ''Acherontiscus caledoniae'', named by paleontologist Robert Carroll in 1969. Members of this genus have an unusual combination of features which makes their placement within amphibian-grade tetrapods uncertain. They possess multi-bone vertebrae similar to those of embolomeres, but also a skull similar to lepospondyls. The only known specimen of ''Acherontiscus'' possessed an elongated body similar to that of a snake or eel. No limbs were preserved, and evidence for their presence in close relatives of ''Acherontiscus'' is dubious at best. Phylogenetic analyses created by Marcello Ruta and other paleontologists in the 2000s indicate that ''Acherontiscus'' is part of Adelospondyli, closely related to other snake-like animals such as '' Adelogyrinus'' and ''Dolichopareias''. Adelospondyls are traditionally placed within t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acherontiscus
''Acherontiscus'' is an extinct genus of stegocephalians that lived in the Early Carboniferous ( Mississippian era) of Scotland. The type and only species is ''Acherontiscus caledoniae'', named by paleontologist Robert Carroll in 1969. Members of this genus have an unusual combination of features which makes their placement within amphibian-grade tetrapods uncertain. They possess multi-bone vertebrae similar to those of embolomeres, but also a skull similar to lepospondyls. The only known specimen of ''Acherontiscus'' possessed an elongated body similar to that of a snake or eel. No limbs were preserved, and evidence for their presence in close relatives of ''Acherontiscus'' is dubious at best. Phylogenetic analyses created by Marcello Ruta and other paleontologists in the 2000s indicate that ''Acherontiscus'' is part of Adelospondyli, closely related to other snake-like animals such as ''Adelogyrinus'' and ''Dolichopareias''. Adelospondyls are traditionally placed within the gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolichopareias
''Dolichopareias'' is an extinct genus of prehistoric amphibian. See also * Prehistoric amphibian * List of prehistoric amphibians This list of prehistoric amphibians is an attempt to create a comprehensive listing of all genera from the fossil record that have ever been considered to be amphibians, excluding purely vernacular terms. The list includes all commonly accepted g ... References External links 2D, stereoscopic, and 3D imagery of the type specimen of Dolichopareias disjectus Adelospondyls Taxa named by D. M. S. Watson [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeomolgophis
''Palaeomolgophis'' is an extinct genus of eel-like prehistoric amphibian containing a single species—''Palaeomolgophis scoticus''. Their limbs are much reduced, and they were probably were fully aquatic. See also * Prehistoric amphibian * List of prehistoric amphibians This list of prehistoric amphibians is an attempt to create a comprehensive listing of all genera from the fossil record that have ever been considered to be amphibians, excluding purely vernacular terms. The list includes all commonly accepted g ... References External links 2D, stereoscopic, and 3D imagery of the type specimen of ''Palaeomolgophis scoticus'' Adelospondyls Fossil taxa described in 1967 Carboniferous amphibians of Europe {{paleo-amphibian-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adelospondylus
''Adelospondylus'' is an extinct lepospondyl amphibian Amphibians are tetrapod, four-limbed and ectothermic vertebrates of the Class (biology), class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terres .... References External links2D, stereoscopic, and 3D imagery of the type specimen of Adelospondylus watsoni Adelospondyls Carboniferous amphibians of Europe [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adelogyrinus
''Adelogyrinus'' is an extinct genus of prehistoric amphibian, fossils of which were found in the Dunnet Shale of Scotland. See also * List of prehistoric amphibians This list of prehistoric amphibians is an attempt to create a comprehensive listing of all genera from the fossil record that have ever been considered to be amphibians, excluding purely vernacular terms. The list includes all commonly accepted g ... References Adelospondyls Paleozoic amphibians of Europe Carboniferous Scotland Fossils of Scotland Fossil taxa described in 1928 Taxa named by D. M. S. Watson {{paleo-amphibian-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lysorophia
Lysorophia is an order of fossorial Carboniferous and Permian tetrapods within the Recumbirostra. Lysorophians resembled small snakes, as their bodies are extremely elongate. There is a single family, the Molgophidae (previously known as Lysorophidae). Currently there are around five genera included within Lysorophia, although many may not be valid. Description The skull is heavily built but with large lateral openings to accommodate jaw musculature, with small orbits restricted to the anterior edge of the large fenestrae. The intertemporal, supratemporal, postfrontal, and jugal bones of the skull have disappeared. The mandibles are short and robust with a small number of large triangular teeth. Although it was initially thought that the maxilla and premaxilla were freely movable, detailed anatomical studies show that this is not the case. The braincase is extremely robust, suggesting that lysorophians engaged in headfirst burrowing. The torso is very elongate, the limbs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snake
Snakes are elongated, Limbless vertebrate, limbless, carnivore, carnivorous reptiles of the suborder Serpentes . Like all other Squamata, squamates, snakes are ectothermic, amniote vertebrates covered in overlapping Scale (zoology), scales. Many species of snakes have skulls with several more joints than their lizard ancestors, enabling them to swallow prey much larger than their heads (cranial kinesis). To accommodate their narrow bodies, snakes' paired organs (such as kidneys) appear one in front of the other instead of side by side, and most have only one functional lung. Some species retain a pelvic girdle with a pair of vestigial claws on either side of the cloaca. Lizards have evolved elongate bodies without limbs or with greatly reduced limbs about twenty-five times independently via convergent evolution, leading to many lineages of legless lizards. These resemble snakes, but several common groups of legless lizards have eyelids and external ears, which snakes lack, altho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aistopoda
Aistopoda (Greek for " avingnot-visible feet") is an order of highly specialised snake-like stegocephalians known from the Carboniferous and Early Permian of Europe and North America, ranging from tiny forms only , to nearly in length. They first appear in the fossil record in the Mississippian period and continue through to the Early Permian. The skull is small but very specialised, with large orbits, and large fenestrae. The primitive form '' Ophiderpeton'' has a pattern of dermal bones in the skull similar in respects to the temnospondyls. But in the advanced genus ''Phlegethontia'' the skull is very light and open, reduced to a series of struts supporting the braincase against the lower jaw, just as in snakes, and it is possible that the aistopods filled the same ecological niches in the Paleozoic that snakes do today. They had an extremely elongated body, with up to 230 vertebrae. The vertebrae were holospondylous, having only a single ossification per segment. They l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scotland
Scotland (, ) is a country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a border with England to the southeast and is otherwise surrounded by the Atlantic Ocean to the north and west, the North Sea to the northeast and east, and the Irish Sea to the south. It also contains more than 790 islands, principally in the archipelagos of the Hebrides and the Northern Isles. Most of the population, including the capital Edinburgh, is concentrated in the Central Belt—the plain between the Scottish Highlands and the Southern Uplands—in the Scottish Lowlands. Scotland is divided into 32 administrative subdivisions or local authorities, known as council areas. Glasgow City is the largest council area in terms of population, with Highland being the largest in terms of area. Limited self-governing power, covering matters such as education, social services and roads and transportation, is devolved from the Scott ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serpukhovian
The Serpukhovian is in the ICS geologic timescale the uppermost stage or youngest age of the Mississippian, the lower subsystem of the Carboniferous. The Serpukhovian age lasted from Ma to Ma. It is preceded by the Visean and is followed by the Bashkirian. The Serpukhovian correlates with the lower part of the Namurian Stage of European stratigraphy and the middle and upper parts of the Chesterian Stage of North American stratigraphy. Name and definition The Serpukhovian Stage was proposed in 1890 by Russian stratigrapher Sergei Nikitin and was introduced in the official stratigraphy of European Russia in 1974. It was named after the city of Serpukhov, near Moscow. The ICS later used the upper Russian subdivisions of the Carboniferous in its international geologic time scale. The base of the Serpukhovian is informally defined by the first appearance of the conodont '' Lochriea ziegleri'', though the utility and systematic stability of this species is not yet certain. N ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific Classification
Taxonomy is the practice and science of categorization or classification. A taxonomy (or taxonomical classification) is a scheme of classification, especially a hierarchical classification, in which things are organized into groups or types. Among other things, a taxonomy can be used to organize and index knowledge (stored as documents, articles, videos, etc.), such as in the form of a library classification system, or a search engine taxonomy, so that users can more easily find the information they are searching for. Many taxonomies are hierarchies (and thus, have an intrinsic tree structure), but not all are. Originally, taxonomy referred only to the categorisation of organisms or a particular categorisation of organisms. In a wider, more general sense, it may refer to a categorisation of things or concepts, as well as to the principles underlying such a categorisation. Taxonomy organizes taxonomic units known as "taxa" (singular "taxon")." Taxonomy is different from m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
