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Mirarce
''Mirarce'' (meaning "wonderful winged messenger") is a genus of enantornithe bird from the Late Cretaceous of Utah. It contains a single species, ''M. eatoni''.Science NewsMirarce eatoni: Newly-Discovered Cretaceous Bird Lived Among Dinosaurs, Was Strong Flier November 13, 2018. It was similar in size to modern turkeys. Discovery In 1992, in Utah, USA, paleontologist Howard Hutchison discovered fossilized remains of an enantiornithine bird. For a long time they have not been described; they were sometimes figured under the unofficial name of "Kaiparowits enantiornithine". The holotype, UCMP 139500, is well preserved in three dimensions. It consists of a partial postcranial skeleton without a skull, including 3 cervical and 2 thoracic vertebrae, a pygostyle, a furcula, the xiphoid process of the sternum, a fragment of the left scapula and a coracoid, the humerus, ulna, and radius with fragments of the manus, several fused fragments of the pelvic girdle, and some elements of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mirarce NT
''Mirarce'' (meaning "wonderful winged messenger") is a genus of Enantiornithes, enantornithe bird from the Late Cretaceous of Utah. It contains a single species, ''M. eatoni''.Science NewsMirarce eatoni: Newly-Discovered Cretaceous Bird Lived Among Dinosaurs, Was Strong Flier November 13, 2018. It was similar in size to modern Turkey (bird), turkeys. Discovery In 1992, in Utah, USA, paleontologist Howard Hutchison discovered fossilized remains of an Enantiornithes, enantiornithine bird. For a long time they have not been described; they were sometimes figured under the unofficial name of "Kaiparowits Formation, Kaiparowits enantiornithine". The holotype, UCMP 139500, is well preserved in three dimensions. It consists of a partial postcranial skeleton without a skull, including 3 cervical and 2 thoracic vertebrae, a pygostyle, a furcula, the xiphoid process of the sternum, a fragment of the left scapula and a coracoid, the humerus, ulna, and radius with fragments of the manus, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mirarce Eatoni Reconstruction
''Mirarce'' (meaning "wonderful winged messenger") is a genus of enantornithe bird from the Late Cretaceous of Utah. It contains a single species, ''M. eatoni''.Science NewsMirarce eatoni: Newly-Discovered Cretaceous Bird Lived Among Dinosaurs, Was Strong Flier November 13, 2018. It was similar in size to modern turkeys. Discovery In 1992, in Utah, USA, paleontologist Howard Hutchison discovered fossilized remains of an enantiornithine The Enantiornithes, also known as enantiornithines or enantiornitheans in literature, are a group of extinct avialans ("birds" in the broad sense), the most abundant and diverse group known from the Mesozoic era. Almost all retained teeth and cla ... bird. For a long time they have not been described; they were sometimes figured under the unofficial name of "Kaiparowits Formation, Kaiparowits enantiornithine". The holotype, UCMP 139500, is well preserved in three dimensions. It consists of a partial postcranial skeleton without a skull, incl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaiparowits Formation
The Kaiparowits Formation is a sedimentary rock formation found in the Kaiparowits Plateau in Grand Staircase–Escalante National Monument, in the southern part of Utah in the western United States. It is over 2800 feet (850 m) thick, and is Campanian in age. This Upper Cretaceous formation was formed from alluvial floodplains of large rivers in coastal southern Laramidia; sandstone beds are the deposit of rivers, and mudstone beds represent floodplain deposits. It is fossiliferous, with most specimens from the lower half of the formation, but exploration is only comparatively recent, with most work being done since 1982. It has been estimated that less than 10% of the Kaiparowits formation has been explored for fossils. Most fieldwork has been conducted by The Natural History Museum of Utah. Age Traditionally, the Kaiparowits Formation has been considered to be roughly equivalent in age to the northern Dinosaur Park Formation. This, combined with the differences in fauna betw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enantiornithes
The Enantiornithes, also known as enantiornithines or enantiornitheans in literature, are a group of extinct avialans ("birds" in the broad sense), the most abundant and diverse group known from the Mesozoic era. Almost all retained teeth and clawed fingers on each wing, but otherwise looked much like modern birds externally. Over eighty species of Enantiornithes have been named, but some names represent only single bones, so it is likely that not all are valid. The Enantiornithes became extinct at the Cretaceous–Paleogene boundary, along with Hesperornithes and all other non-avian dinosaurs. Discovery and naming The first Enantiornithes to be discovered were incorrectly referred to modern bird groups. For example, the first known species of Enantiornithes, ''Gobipteryx minuta'', was originally considered a paleognath related to ostriches and tinamou. The Enantiornithes were first recognized as a distinct lineage, or "subclass" of birds, by Cyril A. Walker in 1981. Walker mad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avisaurids
Avisauridae is a family of extinct enantiornithine dinosaurs from the Cretaceous period, distinguished by several features of their ankle bones. Depending on the definition used, Avisauridae is either a broad and widespread group of advanced enantiornithines (following Cau & Arduini, 2008), or a small family within that group, restricted to species from the Late Cretaceous of North and South America (following Chiappe, 1992). Description Avisaurids were among the largest and last enantiornithines to have lived, although they are also among the most poorly preserved. The majority of them are known primarily from fossilized tarsometatarsal bones, the part of a bird's leg formed by fused metatarsals (the bones which comprise the foot in humans). As a result, members of this family are distinguished from other enantiornithines exclusively by features of the tarsometatarsal and pedal phalanges (toe bones). Unlike in some prehistoric birds, avisaurid tarsometatarsals were not co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avisauridae
Avisauridae is a family of extinct enantiornithine dinosaurs from the Cretaceous period, distinguished by several features of their ankle bones. Depending on the definition used, Avisauridae is either a broad and widespread group of advanced enantiornithines (following Cau & Arduini, 2008), or a small family within that group, restricted to species from the Late Cretaceous of North and South America (following Chiappe, 1992). Description Avisaurids were among the largest and last enantiornithines to have lived, although they are also among the most poorly preserved. The majority of them are known primarily from fossilized tarsometatarsal bones, the part of a bird's leg formed by fused metatarsals (the bones which comprise the foot in humans). As a result, members of this family are distinguished from other enantiornithines exclusively by features of the tarsometatarsal and pedal phalanges (toe bones). Unlike in some prehistoric birds, avisaurid tarsometatarsals were not comple ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arke
In Greek mythology, Arke or Arce ( grc-gre, Ἄρκη, ''Árkē'', meaning "swift") is one of the daughters of Thaumas and sister to Iris. During the Titanomachy, Arke fled from the Olympians' camp and joined the Titans, unlike Iris who remained loyal to Zeus and his allies. After the war was over and the Titans with their allies were defeated, Zeus cut off her wings and cast Arke into Tartarus. Mythology She and Iris were both messenger goddesses. During the Titanomachy, she sided with the Titans against the Olympian gods; she became the messenger for the Titans, while Iris became the messenger of the Olympian Gods. When the Olympian gods won, Zeus punished Arke. She was deprived of her wings and cast into Tartarus, together with the vanquished Titans. Arke's wings were later given to Peleus and Thetis as a gift on their wedding day; Thetis later gave them to her son Achilles, which is thought to be the derivation of his surname ''Podarces'' (literally "swift-footed", as if fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Cretaceous Birds Of North America
Late may refer to: * LATE, an acronym which could stand for: ** Limbic-predominant age-related TDP-43 encephalopathy, a proposed form of dementia ** Local-authority trading enterprise, a New Zealand business law ** Local average treatment effect, a concept in econometrics Music * ''Late'' (album), a 2000 album by The 77s * Late!, a pseudonym used by Dave Grohl on his ''Pocketwatch'' album * Late (rapper), an underground rapper from Wolverhampton * "Late" (song), a song by Blue Angel * "Late", a song by Kanye West from ''Late Registration'' Other * Late (Tonga), an uninhabited volcanic island southwest of Vavau in the kingdom of Tonga * "Late" (''The Handmaid's Tale''), a television episode * LaTe, Oy Laivateollisuus Ab, a defunct shipbuilding company * Late may refer to a person who is Dead See also * * * ''Lates'', a genus of fish in the lates perch family * Later (other) * Tardiness * Tardiness (scheduling) In scheduling, tardiness is a measure of a delay in exe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous
The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Avisaurus
''Avisaurus'' (meaning "bird lizard") is a genus of enantiornithine bird from the Late Cretaceous of North America. Discovery ''Avisaurus archibaldi'' was discovered in the Late Cretaceous Hell Creek Formation of North America (Maastrichtian, from c.70.6-66 million years ago), making it one of the last enantiornithids. It was collected in 1975 in the UCMP locality V73097, in Garfield County, Montana, USA. The holotype is represented by a single fossil of a tarsometatarsus in the collection of the University of California Museum of Paleontology. It has the catalog number UCMP 117600. The species name honors J. David Archibald, its discoverer, from The University of California, Berkeley. It was initially described as the left tarsometatarsus of a non-avian theropod by Brett-Surman and Paul in 1985. It was later redescribed as the right tarsometatarsus of an enantiornithine bird by Chiappe in 1992.Chiappe, Luis M. (1992) "Enantiornithine (Aves) Tarsometatarsi and the Avian Affinities ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quill Knobs
The pennaceous feather is a type of feather present in most modern birds and in some other species of maniraptoriform dinosaurs. Description A pennaceous feather has a stalk or quill. Its basal part, called a ''calamus'', is embedded in the skin. The calamus is hollow and has pith formed from the dry remains of the feather pulp, and the calamus opens below by an ''inferior umbilicus'' and above by a ''superior umbilicus''. The stalk above the calamus is a solid ''rachis'' having an umbilical groove on its underside. Pennaceous feathers have a rachis with ''vanes'' or ''vaxillum '' spreading to either side. These vanes are composed of a high number of flattened ''barbs'', that are connected to one another with ''barbules''. The barbules are tiny strands that criss-cross on the flattened sides of the barbs. This forms a miniature velcro-like mesh that holds all the barbs together, stabilizing the vanes. Pennaceous feathers on the wing, and elsewhere that stresses related to fligh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campanian
The Campanian is the fifth of six ages of the Late Cretaceous Epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campanian spans the time from 83.6 (± 0.2) to 72.1 (± 0.2) million years ago. It is preceded by the Santonian and it is followed by the Maastrichtian. The Campanian was an age when a worldwide sea level rise covered many coastal areas. The morphology of some of these areas has been preserved: it is an unconformity beneath a cover of marine sedimentary rocks. Etymology The Campanian was introduced in scientific literature by Henri Coquand in 1857. It is named after the French village of Champagne in the department of Charente-Maritime. The original type locality was a series of outcrop near the village of Aubeterre-sur-Dronne in the same region. Definition The base of the Campanian Stage is defined as a place in the stratigraphic column wher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
