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Wunketru
''Wunketru'' is an extinct genus of waterfowl from the Eocene Las Flores Formation of Chubut Province, Argentina. The genus contains a single species, ''Wunketru howardae'', known from a partial skeleton previously classified as a species of '' Telmabates''. Discovery and naming The holotype, consisting of ninety mineralized bones, all somewhat distorted, such as small skull fragments, the main bones of the leg, wing, and pectoral girdle, the manubrial end of the sternum including part of the keel, a pelvis fragment, a sacrum, and a few vertebrae, was described as being similar to '' Telmabates antiquus'' by Howard (1955). The fossils were named as '' Telmabates howardae'' by Cracraft (1970). Feduccia and McGrew (1974) considered ''T. howardae'' to be a junior synonym of '' Presbyornis pervetus''.Alan Feduccia, Paul O. McGrew (1974); A flamingolike wader from the Eocene of Wyoming. ''Rocky Mountain Geology''; 13 (2): 49–61. In 2024, De Mendoza, Degrange & Tambussi named ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Presbyornis
''Presbyornis'' is an extinct genus of presbyornithid bird from North America during the Paleogene period, between the Late Paleocene and Early Eocene. History of discovery The fossil record of ''P. pervetus'' includes many complete skeletons from Green River Formation sites (Early Eocene), suggesting that the birds nested in colonies and that they possibly died due to volcanism or botulism, the latter of which is similar to many colony-nesting waterfowl or shorebirds today. Fossils identified as ''P.'' cf. ''pervetus'' have been discovered from the Margaret Formation of Ellesmere Island, where the remains of '' Gastornis'' sp. have also been found. ''P. recurvirostra'' is known from a partial wing ( KUVP 10105) found in the Colton Formation, from the Late Paleocene to Early Eocene sediments of the Wasatch Plateau near Ephraim, Utah. ''P. isoni'', much larger than ''P. pervetus'', is known from the Late Paleocene Aquia Formation in Maryland, based on the partial humerus ( U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2024 In Archosaur Paleontology
This article records new taxa of every kind of fossil archosaur that are scheduled to be Species description, described during 2024, as well as other significant discoveries and events related to the paleontology of archosaurs published in 2024. Pseudosuchians New pseudosuchian taxa General pseudosuchian research * Evidence of the impact of function on the evolution of the lower jaw morphology in crocodile-line archosaurs is presented by Rawson ''et al.'' (2024). * A review of studies on the thermometabolism of crocodile-line archosaurs from the preceding 20 years is published by Faure-Brac (2024). * Sennikov (2024) interprets Ornithosuchidae, ornithosuchids as macrophagous predators with specialized jaw apparatus, and notes analogs between them and saber-toothed therapsids (including mammals). * A study on the locomotion of ''Riojasuchus, Riojasuchus tenuisceps'' is published by von Baczko ''et al.'' (2024), who reconstruct ''R. tenuisceps'' as having an erect posture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telmabates
''Telmabates'' is an extinct genus of presbyornithidE. N. Kurochkin, G. J. Dyke, and A. A. Karhu. (2002). A new presbyornithid bird (Aves, Anseriformes) from the Late Cretaceous of southern Mongolia. ''American Museum Novitates'' 3386:1-11 bird from the Eocene Bird Clay Locality of the Sarmiento Formation of Chubut Province, Argentina. The genus contains a single species, ''T. antiquus''. ''Telmabates antiquus'' was named and described by Howard Howard is a masculine given name derived from the English surname Howard. ''The Oxford Dictionary of English Christian Names'' notes that "the use of this surname as a christian name is quite recent and there seems to be no particular reason for ... (1955).H. Howard. (1955). A new wading bird from the Eocene of Patagonia. ''American Museum Novitates'' 1710:1-25 A second species, ''T. howardae'' was named by Cracraft (1970), but De Mendoza, Degrange & Tambussi (2024) moved ''T. howardae'' to the new species '' Wunketru howardae'' as th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anseriformes
Anseriformes is an order (biology), 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, goose, 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 Penis#Birds, penises, a trait that has been lost in the Neoaves, the clade consisting of all other modern birds except the galliformes and paleognaths. 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 ecologic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alan Feduccia
John Alan Feduccia (born April 25, 1943) is a paleornithologist specializing in the origins and phylogeny of birds. He is S. K. Heninger Distinguished Professor Emeritus at the University of North Carolina. Feduccia's authored works include three major books, ''The Age of Birds'',Feduccia (1980) ''The Origin and Evolution of Birds'', and ''Riddle of the Feathered Dragons''. Feduccia opposes the overwhelming scientific consensus that birds originated from and are deeply nested within Theropoda, and are therefore living theropod dinosaurs. He has argued for an alternative theory in which birds share a common stem-ancestor with theropod dinosaurs among more basal archosaurian lineages, with birds originating from small arboreal archosaurs in the Triassic. Education Feduccia graduated with a B.S. from Louisiana State University, taking ornithological expeditions to Honduras, El Salvador and Peru. He received his M.A. and Ph.D. (1969) from the University of Michigan. Academic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tertiary Extinctions Of Vertebrate Taxa
Tertiary (from Latin, meaning 'third' or 'of the third degree/order..') may refer to: * Tertiary period, an obsolete geologic period spanning from 66 to 2.6 million years ago * Tertiary (chemistry), a term describing bonding patterns in organic chemistry * Tertiary care, specialized consultative healthcare * Tertiary color, a color made up by mixing one primary color with one secondary color, in a given color space * Tertiary consumer, in ecology * Tertiary education, educational levels following the completion of secondary education such as university or trade school * Tertiary feathers or tertials, feathers attached to humerus or inner portion of the wings of birds * Tertiary sector of the economy, or the service sector * Tertiary source, in research * Tertiary stress, a proposed level of stress in phonetics * In biochemistry, the tertiary structure of a protein is its overall shape, also known as its fold * Tertiary, a member of a third order religious group See also * Ternary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene First Appearances
The Eocene ( ) is a geological epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''Ēṓs'', ' Dawn') and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch.See: *Letter from William Whewell to Charles Lyell dated 31 January 1831 in: * From p. 55: "The period next antecedent we shall call Eocene, from ήως, aurora, and χαινος, recens, because the extremely small proportion of living species contained in these strata, indicates what may be considered the first commencement, or ''dawn'', of the existing state of the animate creation." The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isotope 13C in the atmosphere was exceptionally l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incertae Sedis
or is a term used for a taxonomy (biology), taxonomic group where its broader relationships are unknown or undefined. Alternatively, such groups are frequently referred to as "enigmatic taxa". In the system of open nomenclature, uncertainty at specific taxonomic levels is indicated by (of uncertain family), (of uncertain suborder), (of uncertain order) and similar terms. Examples * The fossil plant ''Paradinandra, Paradinandra suecica'' could not be assigned to any family, but was placed ''incertae sedis'' within the order Ericales when described in 2001. * The fossil ''Gluteus minimus (fossil), Gluteus minimus'', described in 1975, could not be assigned to any known animal phylum. The genus is therefore ''incertae sedis'' within the kingdom Animalia. * While it was unclear to which order the New World vultures (family Cathartidae) should be assigned, they were placed in Aves ''incertae sedis''. It was later agreed to place them in a separate order, Cathartiformes. * Boc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species Description
A species description is a formal scientific description of a newly encountered species, typically articulated through a scientific publication. Its purpose is to provide a clear description of a new species of organism and explain how it differs from species that have been previously described or related species. For a species to be considered valid, a species description must follow established guidelines and naming conventions dictated by relevant nomenclature codes. These include the International Code of Zoological Nomenclature (ICZN) for animals, the International Code of Nomenclature for algae, fungi, and plants (ICN) for plants, and the International Committee on Taxonomy of Viruses (ICTV) for viruses. A species description often includes photographs or other illustrations of type material and information regarding where this material is deposited. The publication in which the species is described gives the new species a formal scientific name. Some 1.9 million ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argentina
Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourth-largest country in the Americas, and the List of countries and dependencies by area, eighth-largest country in the world. Argentina shares the bulk of the Southern Cone with Chile to the west, and is also bordered by Bolivia and Paraguay to the north, Brazil to the northeast, Uruguay and the South Atlantic Ocean to the east, and the Drake Passage to the south. Argentina is a Federation, federal state subdivided into twenty-three Provinces of Argentina, provinces, and one autonomous city, which is the federal capital and List of cities in Argentina by population, largest city of the nation, Buenos Aires. The provinces and the capital have their own constitutions, but exist under a Federalism, federal system. Argentina claims sovereignty ov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hildegarde Howard
Hildegarde Howard (April 3, 1901 – February 28, 1998) was an American pioneer in paleornithology. She was mentored by the famous ornithologist, Joseph Grinnell, at the Museum of Vertebrate Zoology (MVZ) and in avian paleontology.Joyce Harvey & Marilyn Ogilvie (2000), ''The Biographical Dictionary of Women in Science'', Volume 1, pp.621 et seq She was well known for her discoveries in the La Brea Tar Pits, among them the Rancho La Brea eagles. She discovered and described Pleistocene flightless waterfowl at the prehistoric Ballona wetlands Ballona Wetlands Ecological Reserve (pronunciation: "Bah-yo-nuh" or "Buy-yo-nah" ) is a protected area that once served as the natural estuary for neighboring Ballona Creek. The site is located in Los Angeles County, California, just south o ... of coastal Los Angeles County at Playa del Rey. In 1953, Howard became the third woman to be awarded the Brewster Medal. She was the first woman president of the Southern California Academy of S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joel Cracraft
Joel Lester Cracraft (born July 31, 1942), is an American paleontologist and ornithologist. He received a PhD in 1969 from Columbia University (''Functional Morphology of Locomotion in Birds''). His research interests include: theory and methods of comparative biology, evolutionary theory, biological diversification, systematics, the evolution of morphological systems, historical biogeography, molecular systematics and evolution. From 1970 he has been a research associate at the Field Museum of Natural History, Chicago; from 1970 to 1992, full professor at the University of Illinois at Chicago; from 1993 to 1994, acting director of the Center for Biodiversity and Conservation at the American Museum of Natural History; from 1992, adjunct professor at the Graduate Center of the City University of New York; from 1997 adjunct professor at Columbia University; from 1992 curator at American Museum of Natural History; and from 2002 Lamont Curator of Birds at American Museum of Natural ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
