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Eopteranodon Lii
''Eopteranodon'' (meaning "dawn ''Pteranodon'' (toothless wing)") is a genus of tapejarid pterosaur from the Aptian-age Lower Cretaceous Yixian Formation of Beipiao City, Liaoning, China. The genus was named in 2005 by paleontologists Lü Junchang and Zhang Xingliao. The type and only species is ''Eopteranodon lii''. Description and classification ''Eopteranodon'' is based on the type specimen or holotype BPV-078, an incomplete skeleton and skull. Its skull, including a large crest, was toothless and similar to that of ''Pteranodon''. The skull lacks the point of the snout but it was in life less than 200 millimeters long (7.9 inches), and the animal had a wingspan of about 1.1 meters (3.6 feet). A second specimen, D2526, described in 2006, had a larger wingspan. Despite its similarities to ''Pteranodon'', ''Eopteranodon'' was not placed into a family by its describers, who put it into the clade Pteranodontia as ''incertae sedis'' (uncertain position). Shortly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Cretaceous
The Early Cretaceous ( geochronological name) or the Lower Cretaceous (chronostratigraphic name), is the earlier or lower of the two major divisions of the Cretaceous. It is usually considered to stretch from 145 Ma to 100.5 Ma. Geology Proposals for the exact age of the Barremian-Aptian boundary ranged from 126 to 117 Ma until recently (as of 2019), but based on drillholes in Svalbard the defining early Aptian Oceanic Anoxic Event 1a (OAE1a) was carbon isotope dated to 123.1±0.3 Ma, limiting the possible range for the boundary to c. 122–121 Ma. There is a possible link between this anoxic event and a series of Early Cretaceous large igneous provinces (LIP). The Ontong Java-Manihiki-Hikurangi large igneous province, emplaced in the South Pacific at c. 120 Ma, is by far the largest LIP in Earth's history. The Ontong Java Plateau today covers an area of 1,860,000 km2. In the Indian Ocean another LIP began to form at c. 120 Ma, the Kerguelen P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alexander Kellner
Alexander Wilhelm Armin Kellner (born September 26, 1961) is a Brazilian geologist and paleontologist who is a leading expert in the field of studying pterosaurs. His research has focused mainly on fossil reptiles from the Cretaceous Period, including extinct dinosaurs and crocodylomorphs. Kellner has over 500 publications to his name, has published more than 160 primary studies and two science books. He has participated in paleontological expeditions to many locations including Brazil, Chile, Iran, the United States, Argentina, China, and Antarctica. His scientific achievements include the description of more than thirty species. For his work he has received several honors and prizes, including the TWAS Prize for Earth Sciences from The World Academy of Sciences and admission to the National Order of Scientific Merit (class Comendador), one Brazil's most prestigious awards. Biography Kellner was born in Vaduz, Liechtenstein, son of a German father and Austrian mother. In hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nemicolopterus Crypticus
''Nemicolopterus'' is a genus of tapejaromorph pterosaur, based on a very small specimen described as the smallest known "adult" pterosaur to date. It lived in the Jehol Biota 120 million years ago. Discovery and naming The generic name "Nemicolopterus" comes from the following Greek words: "Nemos" meaning "forest", "ikolos" meaning "dweller", and Latinised "pteron" meaning "wing". The specific name ''crypticus'' is from "kryptos", meaning "hidden". Thus "''Nemicolopterus crypticus''" means "Hidden flying forest dweller". Description The type fossil specimen of ''N. crypticus'', catalog number IVPP V-14377, is housed in the collection of the Institute of Vertebrate Paleontology and Paleoanthropology in Beijing, China. The fossil was collected from the Jiufotang Formation, which is of Aptian age (120 mya). It was discovered in the Luzhhouou locality of Yaolugou Town, Jianchang County, Huludao City, western Liaoning Province in northeastern China. It has a wingspan of sligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sinopterus
''Sinopterus'' (meaning "Chinese wing") was a genus of tapejarid pterodactyloid pterosaur from the Aptian-age Lower Cretaceous Jiufotang Formation of Chaoyang, Liaoning, China. It was first described and named by Wang Xiaolin and Zhou Zhonghe. Three species have been classified in this genus, though only two are generally considered to be valid. ''Sinopterus'' is known for its proportionally large skull, which has a birdlike pointed beak, a long bony crest that starts with a tall premaxilla and goes back along the middle of the skull to form a point overhanging the rear of the skull, and its lack of teeth. Description The type species, ''S. dongi'', is based on IVPP V13363, an articulated, nearly complete skeleton. The skull of this individual was 17 centimeters (6.7 inches) long, and the wingspan was estimated to be 1.2 meters (3.9 feet). The authors suggested that it was an omnivore, and noted that it was the first record of a tapejarid outside of Brazil, and the earlies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tapejaromorpha
Tapejaromorpha is a group of pterosaurs within the clade Azhdarchoidea. The fossil remains of tapejaromorphs dated back to the Cretaceous period. The Tapejaromorpha was defined in 2014 by Andres and colleagues. They made Tapejaromorpha the most inclusive clade containing ''Tapejara'' but not ''Quetzalcoatlus''. Martill and Naish had previously proposed this same definition for Tapejaridae Tapejaridae (from a Tupi word meaning "the old being") are a family of pterodactyloid pterosaurs from the Cretaceous period. Members are currently known from Brazil, England, Hungary, Morocco, Spain, the United States, and China. The most primiti ..., but did not formalize it. Andres and colleagues instead defined Tapejaridae more narrowly, as the clade ''Tapejara'' + ''Sinopterus''. References {{pterosaur-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Azhdarchidae
Azhdarchidae (from the Persian word , , a dragon-like creature in Persian mythology) is a family of pterosaurs known primarily from the Late Cretaceous Period, though an isolated vertebra apparently from an azhdarchid is known from the Early Cretaceous as well (late Berriasian age, about 140 million years ago). Azhdarchids included some of the largest known flying animals of all time, but smaller cat-size members have also been found. Originally considered a sub-family of Pteranodontidae, Nesov (1984) named the Azhdarchinae to include the pterosaurs ''Azhdarcho'', ''Quetzalcoatlus'', and ''Titanopteryx'' (now known as ''Arambourgiania''). They were among the last known surviving members of the pterosaurs, and were a rather successful group with a worldwide distribution. By the time of the end-Cretaceous mass extinction, most pterosaur families except for the Azhdarchidae disappear from the fossil record, but recent studies indicate a wealth of pterosaurian fauna, including pteran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaoyangopteridae
Chaoyangopteridae (or chaoyangopterids) is a family of pterosaurs within the larger group Azhdarchoidea. Chaoyangopterids lived mostly during the Early Cretaceous period, though possible members, ''Microtuban'', '' Xericeps'' and ''Argentinadraco'', may extend the fossil range to the Late Cretaceous. History The clade Chaoyangopteridae was first defined in 2008 by Lü Junchang and David Unwin as: "'' Chaoyangopterus'', '' Shenzhoupterus'', their most recent common ancestor and all taxa more closely related to this clade than to '' Tapejara'', ''Tupuxuara'' or ''Quetzalcoatlus''". Based on neck and limb proportions, it has been suggested they occupied a similar ecological niche to that of azhdarchid pterosaurs, though it is possible they were more specialized as several genera occur in Liaoning, while azhdarchids usually occur by one genus in a specific location. Description Chaoyangopterids are distinguished from other pterosaurs by several traits of the nasoantorbital fenestra, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Unwin
David (; , "beloved one") (traditional spelling), , ''Dāwūd''; grc-koi, Δαυΐδ, Dauíd; la, Davidus, David; gez , ዳዊት, ''Dawit''; xcl, Դաւիթ, ''Dawitʿ''; cu, Давíдъ, ''Davidŭ''; possibly meaning "beloved one". was, according to the Hebrew Bible, the third king of the United Kingdom of Israel. In the Books of Samuel, he is described as a young shepherd and harpist who gains fame by slaying Goliath, a champion of the Philistines, in southern Canaan. David becomes a favourite of Saul, the first king of Israel; he also forges a notably close friendship with Jonathan, a son of Saul. However, under the paranoia that David is seeking to usurp the throne, Saul attempts to kill David, forcing the latter to go into hiding and effectively operate as a fugitive for several years. After Saul and Jonathan are both killed in battle against the Philistines, a 30-year-old David is anointed king over all of Israel and Judah. Following his rise to power, David c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quetzalcoatlus
''Quetzalcoatlus'' is a genus of pterosaur known from the Late Cretaceous period of North America (Maastrichtian stage); its members were among the largest known flying animals of all time. ''Quetzalcoatlus'' is a member of the Azhdarchidae, a family of advanced toothless pterosaurs with unusually long, stiffened necks. Its name comes from the Aztec feathered serpent god Quetzalcoatl. The type species is ''Q. northropi'', named by Douglas Lawson in 1975; the genus also includes the smaller species ''Q. lawsoni'', which was known for many years as an unnamed species before being named by Brian Andres and Wann Langston Jr. (posthumously) in 2021. Discovery and species The first ''Quetzalcoatlus'' fossils were discovered in Texas, United States, from the Maastrichtian Javelina Formation at Big Bend National Park (dated to around 68 million years ago) in 1971 by Douglas A. Lawson, then a geology graduate student from the Jackson School of Geosciences at the University of Texas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tupuxuara
''Tupuxuara'' is a genus of large, crested, and toothless Pterodactyloidea, pterodactyloid pterosaur from the Early Cretaceous period (Albian stage) of what is now the Romualdo Formation of the Santana Group, Brazil, about 125 to 112 million years ago. ''Tupuxuara'' is a close relative of ''Thalassodromeus'', and both form a group that is either called Thalassodrominae (if placed within the family Tapejaridae) or Thalassodromidae (if placed within the clade Neoazhdarchia). Discovery The genus was named and described by Alexander Kellner and Diógenes de Almeida Campos in 1988.Kellner, A.W.A., and Campos, D.A. (1988). "Sobre un novo pterossauro com crista sagital da Bacia do Araripe, Cretaceo Inferior do Nordeste do Brasil. (Pterosauria, Tupuxuara, Cretaceo, Brasil)." ''Anais da Academia Brasileira de Ciências'', 60: 459–469. [in Portuguese] The type species is ''Tupuxuara longicristatus''. The genus, generic name refers to a familiar spirit from the mythology of the Tup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tapejara (pterosaur)
''Tapejara'' (from a Tupi word meaning "the old being") is a genus of Brazilian pterosaur from the Cretaceous Period (Santana Formation, dating to about 127 to 112 million years ago). ''Tapejara'' crests consisted of a semicircular crest over the snout, and a bony prong which extended back behind the head. It was a small pterosaur, with a wingspan of approximately . Species and classification The type species and only one currently recognized as valid by most researchers, is ''T. wellnhoferi''. The specific name honors German paleontologist Peter Wellnhofer. Two larger species, originally named ''Tapejara imperator'' and ''Tapejara navigans'', were later classified in the genus ''Tapejara''. However, several studies have shown that ''T. imperator'' and ''T. navigans'' are significantly different from ''T. wellnhoferi'' and therefore were reclassified into new genera. The species ''T. imperator'' was given its own genus, ''Tupandactylus'', by Alexander Kellner and Diogenes de A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
