Sericipterus
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Sericipterus
''Sericipterus'' is an extinct genus of rhamphorhynchid pterosaur. It is known from the Late Jurassic (early Oxfordian age) Shishugou Formation in Xinjiang, China. Etymology The genus was named and described in 2010 by Brian Andres, James Matthew Clark and Xu Xing. The type species is ''Sericipterus wucaiwanensis''. The generic name is derived from Latin ''sericum'', "silk", a reference to the Silk Route, and from a Latinized Greek ''pteron'', "wing". The specific name refers to the Wucaiwan area, itself meaning "five-color bay" because of the many-colored layers. Description The holotype specimen, IVPP V14725, consists of partly crushed, disarticulated bones that are largely preserved three-dimensionally. The wingspan has been estimated to have been at least . The skull of ''Sericipterus'' is similar to those of the "rhamphorhynchoids" (i.e. basal pterosaurs) ''Angustinaripterus'' and ''Harpactognathus''. It had three bony crests: a low crest on the snout, a short low parie ...
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Timeline Of Pterosaur Research
This timeline of pterosaur research is a chronologically ordered list of important fossil discoveries, controversies of interpretation, and taxonomic revisions of pterosaurs, the famed flying reptiles of the Mesozoic era. Although pterosaurs went extinct millions of years before humans evolved, humans have coexisted with pterosaur fossils for millennia. Before the development of paleontology as a formal science, these remains would have been interpreted through a mythological lens. Myths about thunderbirds told by the Native Americans of the modern Western United States may have been influenced by observations of ''Pteranodon'' fossils. These thunderbirds were said to have warred with water monsters, which agrees well with the co-occurrence of ''Pteranodon'' and the ancient marine reptiles of the seaway over which it flew. The formal study of pterosaurs began in the late 18th century when naturalist Cosimo Alessandro Collini of Mannheim, Germany published a description of ...
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Angustinaripterus
''Angustinaripterus'' was a basal pterosaur, belonging to the breviquartossan family Rhamphorhynchidae (more specifically within the subfamily Rhamphorhynchinae) and discovered at Dashanpu near Zigong in the Sichuan province of China. Discovery and etymology ''Angustinaripterus'' was named in 1983 by He Xinlu. The type species is ''Angustinaripterus longicephalus''. The genus name is derived from Latin ''angustus'', "narrow" and ''naris'', "nostril", combined with Latinized Greek ''pteron'', "wing". The specific name is derived from Latin ''longus'', "long", and Greek ''kephale'', "head". The holotype, ZDM T8001, is a single skull with lower jaws, found in 1981 by researchers from the Zigong Historical Museum of the Salt Industry, in the Xiashaximiao Formation (Bathonian). Description The skull of ''Angustinaripterus'', of which the left side is severely damaged, is very elongated and flat. The back part is missing; in its preserved state it has a length of ; the total le ...
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Rhamphorhynchidae
Rhamphorhynchidae is a group of early pterosaurs named after ''Rhamphorhynchus'', that lived in the Late Jurassic. The family Rhamphorhynchidae was named in 1870 by Harry Govier Seeley.Seeley, H.G. (1870). "The Orithosauria: An Elementary Study of the Bones of Pterodactyles." Cambridge, 135 p. Members of the group possess no more than 11 pairs of teeth in the rostrum, a deltopectoral crest that is constricted at the base but expanded at the distal end, and a bent phalange on the fifth toe. Rhamphorhynchidae traditionally contains two subfamilies: the Rhamphorhynchinae and the Scaphognathinae. While not recovered as distinct clades by all analyses, there do appear to be traits uniting members of each group. Rhamphorhynchines are more common, were lightly built, and had jaws ending in pointed tips that contained more teeth, which are often procumbent (pointed forward). Scaphognathines are comparatively quite rare, were more robust skeletally, and had shorter wing proportions. The b ...
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Pterosaur
Pterosaurs (; from Greek ''pteron'' and ''sauros'', meaning "wing lizard") is 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 to 66 million years ago). Pterosaurs are the earliest vertebrates known to have evolved powered flight. Their wings were formed by a membrane of skin, muscle, and other tissues stretching from the ankles to a dramatically lengthened fourth finger. There were two major types of pterosaurs. Basal pterosaurs (also called 'non-pterodactyloid pterosaurs' or 'rhamphorhynchoids') were smaller animals with fully toothed jaws and, typically, long tails. Their wide wing membranes probably included and connected the hind legs. On the ground, they would have had an awkward sprawling posture, but the anatomy of their joints and strong claws would have made them effective climbers, and some may have even lived in trees. Basal pterosaurs were insectiv ...
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Shishugou Formation
The Shishugou Formation () is a geological formation in Xinjiang, China. Its strata date back to the Late Jurassic period. Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel, David B; et al. (2004). "Dinosaur distribution (Late Jurassic, Asia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 550–552. . The Shishugou Formation is considered one of the most phylogenetically and trophically diverse Middle to Late Jurassic theropod fauna. The Wucaiwan Member, once considered a separate, underlying formation,Weishampel, David B; et al. (2004). "Dinosaur distribution (Middle Jurassic, Asia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 541–542. . is now considered the lowest unit of the Shishugou Formation. Lithology At the Wuwaican locality, the formati ...
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Rhamphorhynchinae
Rhamphorhynchidae is a group of early pterosaurs named after ''Rhamphorhynchus'', that lived in the Late Jurassic. The family Rhamphorhynchidae was named in 1870 by Harry Govier Seeley.Seeley, H.G. (1870). "The Orithosauria: An Elementary Study of the Bones of Pterodactyles." Cambridge, 135 p. Members of the group possess no more than 11 pairs of teeth in the rostrum, a deltopectoral crest that is constricted at the base but expanded at the distal end, and a bent phalange on the fifth toe. Rhamphorhynchidae traditionally contains two subfamilies: the Rhamphorhynchinae and the Scaphognathinae. While not recovered as distinct clades by all analyses, there do appear to be traits uniting members of each group. Rhamphorhynchines are more common, were lightly built, and had jaws ending in pointed tips that contained more teeth, which are often procumbent (pointed forward). Scaphognathines are comparatively quite rare, were more robust skeletally, and had shorter wing proportions. The br ...
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List Of Pterosaur Genera
This list of pterosaurs is a comprehensive listing of all genera that have ever been included in the order Pterosauria, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (''nomen dubium''), or were not formally published (''nomen nudum''), as well as junior synonyms of more established names, and genera that are no longer considered pterosaurian. The list currently includes 263 genera. Scope and terminology There is no official, canonical list of pterosaur genera, but the most thorough attempts can be found at the Pterosauria section of Mikko Haaramo's ''Phylogeny Archive'', the Genus Index at Mike Hanson's ''The Pterosauria'', supplemented by the Pterosaur Species List, and in the fourth supplement of Donald F. Glut's ''Dinosaurs: The Encyclopedia'' series. Authors and year The authors column lists the authors of the formal description responsible for the erection of the genus listed. Th ...
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Oxfordian (stage)
The Oxfordian is, in the ICS' geologic timescale, the earliest age of the Late Jurassic Epoch, or the lowest stage of the Upper Jurassic Series. It spans the time between 163.5 ± 1.0 Ma and 157.3 ± 1.0 Ma (million years ago). The Oxfordian is preceded by the Callovian and is followed by the Kimmeridgian. Stratigraphic definitions The Oxfordian Stage was called "Clunch Clay and Shale" by William Smith (1815–1816); in 1818 W. Buckland described them under the unwieldy title "Oxford, Forest or Fen Clay". The term Oxfordian was introduced by Alcide d'Orbigny in 1844. The name is derived from the English city of Oxford, where the beds are well developed, but they crop out almost continuously from Dorset to the coast of Yorkshire, generally forming low, broad valleys. They are well exposed at Weymouth, Oxford, Bedford, Peterborough, and in the cliffs at Scarborough, Red Cliff and Gristhorpe Bay. Rocks of this age are found also in Uig and Skye. The base of the Oxfordian Stage ...
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Harpactognathus
''Harpactognathus'' (meaning "seizing/grasping jaw") is a genus of pterosaur found in the Late Jurassic-age Morrison Formation of Albany County, Wyoming, United States. It is based on NAMAL 101, a partial skull consisting of the snout, recovered from near Bone Cabin Quarry in 1996. The specific name honors the discoverer, Joe Gentry, a volunteer for the Western Paleontological Laboratories, in Lehi, Utah.Carpenter, K., Unwin, D.M., Cloward, K., Miles, C.A., and Miles, C. (2003). A new scaphognathine pterosaur from the Upper Jurassic Formation of Wyoming, USA. In: Buffetaut, E., and Mazin, J.- M. (eds.). ''Evolution and Palaeobiology of Pterosaurs.'' Geological Society of London, Special Publications 217:45-54. The holotype of ''Harpactognathus'' consists of a partial rostrum. Its describers found it to be most similar to ''Scaphognathus'' among pterosaurs, albeit substantially larger (estimated skull length of 280–300 mm (11–12 in), estimated wingspan of at least 2 ...
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Cladistic
Cladistics (; ) is an approach to biological classification in which organisms are categorized in groups (" clades") based on hypotheses of most recent common ancestry. The evidence for hypothesized relationships is typically shared derived characteristics ( synapomorphies'')'' that are not present in more distant groups and ancestors. However, from an empirical perspective, common ancestors are inferences based on a cladistic hypothesis of relationships of taxa whose character states can be observed. Theoretically, a last common ancestor and all its descendants constitute a (minimal) clade. Importantly, all descendants stay in their overarching ancestral clade. For example, if the terms ''worms'' or ''fishes'' were used within a ''strict'' cladistic framework, these terms would include humans. Many of these terms are normally used paraphyletically, outside of cladistics, e.g. as a 'grade', which are fruitless to precisely delineate, especially when including extinct species. R ...
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Clade
A clade (), also known as a monophyletic group or natural group, is a group of organisms that are monophyletic – that is, composed of a common ancestor and all its lineal descendants – on a phylogenetic tree. Rather than the English term, the equivalent Latin term ''cladus'' (plural ''cladi'') is often used in taxonomical literature. The common ancestor may be an individual, a population, or a species (extinct or extant). Clades are nested, one in another, as each branch in turn splits into smaller branches. These splits reflect evolutionary history as populations diverged and evolved independently. Clades are termed monophyletic (Greek: "one clan") groups. Over the last few decades, the cladistic approach has revolutionized biological classification and revealed surprising evolutionary relationships among organisms. Increasingly, taxonomists try to avoid naming taxa that are not clades; that is, taxa that are not monophyletic. Some of the relationships between organisms ...
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