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Odontoanserae
The Odontoanserae is a proposed clade that includes the family Pelagornithidae (pseudo-toothed birds) and the clade Anserimorphae (the order Anseriformes and their stem-relatives). The placement of the pseudo-toothed birds in the evolutionary tree of birds has been problematic, with some supporting the placement of them near the orders Procellariformes and Pelecaniformes based on features in the sternum. In 2005 a cladistic analysis had found support in placing pseudo-toothed birds as the sister group to waterfowl. Evidence for this comes from shared characteristics in the skull such as lack of a crest on the underside of the palatine bone and two condyles on the mandibular process of the quadrate bone, with the middle condyle beakwards of the side condyle. In addition to that, both groups have similar features in their pelvic and pectoral regions. Furthermore, a 2013 study on the growth pattern and structure of the pseudoteeth in ''Pelagornis mauretanicus'' shows more support o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dromornithidae
Dromornithidae, known as mihirungs and informally as thunder birds or demon ducks, were a clade of large, flightless Australian birds of the Oligocene through Pleistocene Epochs. All are now extinct. They were long classified in Struthioniformes, but are now usually classified as galloanseres. Dromornithids were part of the Australian megafauna. One species, ''Dromornis stirtoni'', was tall. Only a single species, ''Genyornis newtoni'' survived into the Late Pleistocene. They are thought to have been herbivorous. The scientific name Dromornithidae derives from the Greek words , ("swift-running") and , ("bird"). Classification The family was named by Max Fürbringer in 1888, citing W. B. Clarke and Gerard Krefft, Owen's separation from ''" Dromaeus"'' and ''Dinornis'', and a note by von Haast allying ''Dromornis'' with ''Dromaeus''. What the nearest relatives of this group are is a controversial issue. For many years it was thought that dromornithids were related to ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anseriformes
Anseriformes is an order of birds also known as waterfowl that comprises about 180 living species of birds in three families: Anhimidae (three species of screamers), Anseranatidae (the magpie goose), and Anatidae, the largest family, which includes over 170 species of waterfowl, among them the ducks, geese, and swans. Most modern species in the order are highly adapted for an aquatic existence at the water surface. With the exception of screamers, males have penises, a trait that has been lost in the Neoaves. Due to their aquatic nature, most species are web-footed. Evolution Anseriformes are one of only two types of modern bird to be confirmed present during the Mesozoic alongside the other dinosaurs, and in fact were among the very few birds to survive their extinction, along with their cousins the galliformes. These two groups only occupied two ecological niches during the Mesozoic, living in water and on the ground, while the toothed enantiornithes were the dominant bird ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastornithidae
''Gastornis'' is an extinct genus of large flightless birds that lived during the mid Paleocene to mid Eocene epochs of the Paleogene period. Fossils have been found in Europe, Asia and North America, with the remains from North America originally assigned to the genus ''Diatryma''. ''Gastornis'' species were very large birds, and have traditionally been considered to be predators of small mammals. However, several lines of evidence, including the lack of hooked claws in known ''Gastornis'' footprints and studies of their beak structure and isotopic signatures of their bones have caused scientists to reinterpret these birds as herbivores that probably fed on tough plant material and seeds. ''Gastornis'' is generally agreed to be related to Galloanserae, the group containing waterfowl and gamebirds. History ''Gastornis'' was first described in 1855 from a fragmentary skeleton. It was named after Gaston Planté, described as a "studious young man full of zeal", who had discover ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conflicto Antarcticus
''Conflicto antarcticus'' is a species of stem waterfowl whose fossils were found in the early Paleocene López de Bertodano Formation of Antarctica, the only species of its genus and the family Conflictonidae. It is characterized by it slender body and long legs, yet possesses a duck-like bill which indicates the form of beak evolved early in Anseriformes. Description ''Conflicto'' is known from a single partially complete specimen described in January 2019. It had long legs compared to its body, contrasting what is seen in modern ducks. It is estimated to be around in length, and had a long head relative to body size. Its beak had a similar structure to that of ducks and geese, but was not as wide. The rostrum possessed narial openings wider than that of modern Anseriformes. Its neck was about half its body length, possessing (estimated) 15 long vertebrae. Classification ''Conflicto'' was a likely a stem anseriform, equally related to the current extant clades. The genus ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelagornis Chilensis EF
''Pelagornis'' is a widespread genus of prehistoric pseudotooth birds. These were probably rather close relatives of either pelicans and storks, or of waterfowl, and are here placed in the order Odontopterygiformes to account for this uncertainty. Description The fossil specimens show that ''P. miocaenus'' was one of the larger pseudotooth birds, hardly smaller in size than ''Osteodontornis'' or the older ''Dasornis''. Its head must have been about long in life, and its wingspan was probably more than , perhaps closer to . Unlike in its contemporary ''Osteodontornis'' but like in the older ''Pseudodontornis'', between each two of ''Pelagorniss large "teeth" was a single smaller one. ''Pelagornis'' differed from ''Dasornis'' and its smaller contemporary ''Odontopteryx'' in having no pneumatic foramen in the fossa pneumotricipitalis of the humerus, a single long latissimus dorsi muscle attachment site on the humerus instead of two distinct segments, and no prominent ligam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastornis Giganteus Restoration
''Gastornis'' is an extinct genus of large flightless birds that lived during the mid Paleocene to mid Eocene epochs of the Paleogene period. Fossils have been found in Europe, Asia and North America, with the remains from North America originally assigned to the genus ''Diatryma''. ''Gastornis'' species were very large birds, and have traditionally been considered to be predators of small mammals. However, several lines of evidence, including the lack of hooked claws in known ''Gastornis'' footprints and studies of their beak structure and isotopic signatures of their bones have caused scientists to reinterpret these birds as herbivores that probably fed on tough plant material and seeds. ''Gastornis'' is generally agreed to be related to Galloanserae, the group containing waterfowl and gamebirds. History ''Gastornis'' was first described in 1855 from a fragmentary skeleton. It was named after Gaston Planté, described as a "studious young man full of zeal", who had discover ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dromornis BW
''Dromornis'' is a genus of large to enormous prehistoric birds. The species were flightless, possessing greatly reduced wing structures but with large legs, similar to the modern ostrich or emu. They were likely to have been predominantly, if not exclusively, herbivorous browsers. The male of the largest species, ''Dromornis stirtoni'', is a contender for the tallest and heaviest bird, and possibly exhibited aggressive territorial behaviour. They belong to the clade dromornithid, extinct flightless birds known as mihirungs. Taxonomy The genus was erected to separate a new species, ''Dromornis australis'', from the previously described ''Dinornis'' (giant moas), another lineage of ancient large and flightless birds found in New Zealand that was earlier described by Richard Owen in 1843. A femur that was forwarded to England, probably a dromornithid and since lost, suggested an Australian genus, but Owen withheld publication for many years. The type specimen, another femur, was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anatalavis
''Anatalavis'' is genus of prehistoric birds related to ducks and geese, perhaps in particular the magpie-goose. The species ''Anatalavis rex'' – formerly placed in ''Telmatornis'' – is known from the Hornerstown Formation (Late Cretaceous or Early Paleocene, some 66 million years ago) of New Jersey. ''Anatalavis oxfordi'' was described based on fossils found in the Eocene (Ypresian age) London Clay (about 55 mya) at Walton-on-the-Naze, England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b .... References * Dyke, GJ (2000) "The fossil waterfowl (Aves: Anseriformes) from the Tertiary of England," ''J. Vertebr. Paleontol.'' 20: 39A. Dyke, GJ (2001) "The fossil waterfowl (Aves: Anseriformes) from the Eocene of England," ''American Museum Novitates'' No. 3354, 15 pp. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelagornis
''Pelagornis'' is a widespread genus of prehistoric pseudotooth birds. These were probably rather close relatives of either pelicans and storks, or of waterfowl, and are here placed in the order Odontopterygiformes to account for this uncertainty. Description The fossil specimens show that ''P. miocaenus'' was one of the larger pseudotooth birds, hardly smaller in size than ''Osteodontornis'' or the older ''Dasornis''. Its head must have been about long in life, and its wingspan was probably more than , perhaps closer to . Unlike in its contemporary ''Osteodontornis'' but like in the older ''Pseudodontornis'', between each two of ''Pelagorniss large "teeth" was a single smaller one. ''Pelagornis'' differed from ''Dasornis'' and its smaller contemporary ''Odontopteryx'' in having no pneumatic foramen in the fossa pneumotricipitalis of the humerus, a single long latissimus dorsi muscle attachment site on the humerus instead of two distinct segments, and no prominent ligam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cayley Anseranas Semipalmata White Background
Cayley may refer to: __NOTOC__ People * Cayley (surname) * Cayley Illingworth (1759–1823), Anglican Archdeacon of Stow * Cayley Mercer (born 1994), Canadian women's ice hockey player Places * Cayley, Alberta, Canada, a hamlet * Mount Cayley, a volcano in southwestern British Columbia, Canada * Cayley Glacier, Graham Land, Antarctica * Cayley (crater), a lunar crater Other uses * Cayley baronets, a title in the Baronetage of England * Cayley computer algebra system, designed to solve mathematical problems, particularly in group theory See also * W. Cayley Hamilton (died 1891), Canadian barrister and politician * Caylee (name), given name * Cèilidh, traditional Scottish or Irish social gathering * Kaylee, given name * Kaley (other) * Kayleigh (other) " Kayleigh" is a song by the British neo-progressive rock band Marillion. Kayleigh may also refer to: People *Kaylee, given name, including list of people named Kayleigh *Layla Kayleigh (born 1985), British-Amer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Greylag Flipped
The greylag goose or graylag goose (''Anser anser'') is a species of large goose in the waterfowl family Anatidae and the type species of the genus ''Anser''. It has mottled and barred grey and white plumage and an orange beak and pink legs. A large bird, it measures between in length, with an average weight of . Its distribution is widespread, with birds from the north of its range in Europe and Asia migrating southwards to spend the winter in warmer places. It is the type species of the genus ''Anser'' and is the ancestor of most breeds of domestic goose, having been domesticated at least as early as 1360 BC. The genus name is from ''anser'', the Latin for "goose". Greylag geese travel to their northerly breeding grounds in spring, nesting on moorlands, in marshes, around lakes and on coastal islands. They normally mate for life and nest on the ground among vegetation. A clutch of three to five eggs is laid; the female incubates the eggs and both parents defend and rear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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