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Microolithus
''Microolithus'' is an oogenus of fossil bird egg from Wyoming, with preserved embryonic remains inside some of its specimens. History Fossil bird eggs from the Paleogene are rare in North America, and have only occasionally been examined microstructurally and compared to modern birds. The specimens that would later be named ''Microolithus'' were collected in 1940 in paleontology, 1940 by the paleontologist R. W. Wilson. In 2013 in paleontology, 2013, paleontologists from Montana State University Frankie D. Jackson and David J. Varricchio teamed up with Joseph A. Corsini from Eastern Oregon University to analyze these specimens, which they assigned to a new oogenus and oospecies, ''Microolithus wilsoni''. This would be only the second oogenus of Paleogene bird egg to be named in North America (the first being ''Incognitoolithus''). Distribution The known specimens of ''Microolithus'' were found in the Eocene Willwood Formation in Park County, Wyoming. Description ''Microolithus'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Egg Fossils
Egg fossils are the fossilized remains of eggs laid by ancient animals. As evidence of the physiological processes of an animal, egg fossils are considered a type of trace fossil. Under rare circumstances a fossil egg may preserve the remains of the once- developing embryo inside, in which case it also contains body fossils. A wide variety of different animal groups laid eggs that are now preserved in the fossil record beginning in the Paleozoic. Examples include invertebrates like ammonoids as well as vertebrates like fishes, possible amphibians, and reptiles. The latter group includes the many dinosaur eggs that have been recovered from Mesozoic strata. Since the organism responsible for laying any given egg fossil is frequently unknown, scientists classify eggs using a parallel system of taxonomy separate from but modeled after the Linnaean system. This "parataxonomy" is called ''veterovata''. History The first named oospecies was '' Oolithes bathonicae'', a name given provisi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Willwood Formation
The Willwood Formation is a sedimentary sequence deposited during the late Paleocene to early Eocene, or Clarkforkian, Wasatchian and Bridgerian in the North American land mammal age, NALMA classification.Willwood Formation at Fossilworks.orgNeasham & Vondra, 1972 Description It consists of fine grained clastic rocks (mudstone and shale) interbedded with medium grained clastic rocks (sandstone) and sporadic Conglomerate (geology), conglomerates. The formation underlies portions of the Bighorn Basin of Big Horn County, Wyoming, Big Horn, Hot Springs County, Wyoming, Hot Springs, Park County, Wyoming, Park and Washakie County, Wyoming, Washakie counties of Wyoming. Dating ...
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Oogenus
Egg fossils are the fossilized remains of eggs laid by ancient animals. As evidence of the physiological processes of an animal, egg fossils are considered a type of trace fossil. Under rare circumstances a fossil egg may preserve the remains of the once- developing embryo inside, in which case it also contains body fossils. A wide variety of different animal groups laid eggs that are now preserved in the fossil record beginning in the Paleozoic. Examples include invertebrates like ammonoids as well as vertebrates like fishes, possible amphibians, and reptiles. The latter group includes the many dinosaur eggs that have been recovered from Mesozoic strata. Since the organism responsible for laying any given egg fossil is frequently unknown, scientists classify eggs using a parallel system of taxonomy separate from but modeled after the Linnaean system. This "parataxonomy" is called ''veterovata''. History The first named oospecies was '' Oolithes bathonicae'', a name given provisi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil Parataxa Described In 2013
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the absolu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medioolithus
''Medioolithus'' is an oogenus of fossil egg laid by a paleognath.Kohring, R., & Hirsch, K. F. (1996). "Crocodilian and avian eggshells from the Middle Eocene of the Geiseltal, Eastern Germany." ''Journal of Vertebrate Paleontology'', 16(1), 67-80. Description ''Medioolithus'' is known several eggshell fragments, and one complete, spherical egg. ''M. geiseltalensis'' is very similar to modern ratite eggs, for example those of ostriches, rheas, and cassowaries. At in diameter, however, it is smaller than the eggs of any of these birds, being more similar in size to the egg of a kiwi Kiwi most commonly refers to: * Kiwi (bird), a flightless bird native to New Zealand * Kiwi (nickname), a nickname for New Zealanders * Kiwifruit, an edible berry * Kiwi dollar or New Zealand dollar, a unit of currency Kiwi or KIWI may also refe .... References {{Reflist Egg fossils Fossil parataxa described in 1996 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germany
Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated between the Baltic and North seas to the north, and the Alps to the south; it covers an area of , with a population of almost 84 million within its 16 constituent states. Germany borders Denmark to the north, Poland and the Czech Republic to the east, Austria and Switzerland to the south, and France, Luxembourg, Belgium, and the Netherlands to the west. The nation's capital and most populous city is Berlin and its financial centre is Frankfurt; the largest urban area is the Ruhr. Various Germanic tribes have inhabited the northern parts of modern Germany since classical antiquity. A region named Germania was documented before AD 100. In 962, the Kingdom of Germany formed the bulk of the Holy Roman Empire. During the 16th ce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sandhill Crane
The sandhill crane (''Antigone canadensis'') is a species of large crane of North America and extreme northeastern Siberia. The common name of this bird refers to habitat like that at the Platte River, on the edge of Nebraska's Sandhills on the American Great Plains. Sandhill Cranes are known to hangout at the edges of bodies of water especially in the Central Florida region. This is the most important stopover area for the nominotypical subspecies, the lesser sandhill crane (''A. c. canadensis''), with up to 450,000 of these birds migrating through annually. Taxonomy In 1750, English naturalist George Edwards included an illustration and a description of the sandhill crane in the third volume of his ''A Natural History of Uncommon Birds''. He used the English name "The Brown and Ash-colour'd Crane". Edwards based his hand-coloured etching on a preserved specimen that had been brought to London from the Hudson Bay area of Canada by James Isham. When in 1758 the Swedish natu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neognaths
Neognathae (; ) is a infraclass of birds, called neognaths, within the class Aves of the clade Archosauria. Neognathae includes the majority of living birds; the exceptions being the tinamous and the flightless ratites, which belong instead to the sister taxon Palaeognathae. There are nearly 10,000 living species of neognaths. The earliest fossils are known from the very end of the Cretaceous but molecular clocks suggest that neognaths originated sometime in the first half of the Late Cretaceous, about 90 million years ago. Since then, they have undergone adaptive radiation, producing the diversity of form, function, and behavior that exists today. Neognathae includes the order Passeriformes (perching birds), one of the largest orders of land vertebrates, containing some 60% of living birds. Passeriformes is twice as species-rich as Rodentia and about five times as species-rich as Chiroptera (bats), which are the two largest orders of mammals. Neognathae also contains ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metoolithus
''Metoolithus'' is an oogenus of fossil bird egg from Nebraska. It is known from a single, near-complete egg, as well as several eggshell fragments. They are small, (60 mm x 44 mm) and spheroid. They show a mix of avian Avian may refer to: *Birds or Aves, winged animals *Avian (given name) (russian: Авиа́н, link=no), a male forename Aviation *Avro Avian, a series of light aircraft made by Avro in the 1920s and 1930s *Avian Limited, a hang glider manufacture ... and non-avian characteristics. References Fossil parataxa described in 2013 Egg fossils {{eggshell-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Periosteum
The periosteum is a membrane that covers the outer surface of all bones, except at the articular surfaces (i.e. the parts within a joint space) of long bones. Endosteum lines the inner surface of the medullary cavity of all long bones. Structure The periosteum consists of an outer fibrous layer, and an inner cambium layer (or osteogenic layer). The fibrous layer is of dense irregular connective tissue, containing fibroblasts, while the cambium layer is highly cellular containing progenitor cells that develop into osteoblasts. These osteoblasts are responsible for increasing the width of a long bone and the overall size of the other bone types. After a bone fracture, the progenitor cells develop into osteoblasts and chondroblasts, which are essential to the healing process. The outer fibrous layer and the inner cambium layer is differentiated under electron micrography. As opposed to osseous tissue, the periosteum has nociceptors, sensory neurons that make it very sensitive to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Park County, Wyoming
Park County is a county in the U.S. state of Wyoming. As of the 2020 United States Census, the population was 29,624. The county seat is Cody. Park County is a major tourism destination. The county has over 53 percent of Yellowstone National Park's land area. Many attractions abound, including the Buffalo Bill Historical Center, the Cody Stampede Rodeo, the Ghost Town of Kirwin, and the western museum Old Trail Town. History Wyoming gained separate territorial status in 1868. Before that, most of the state's area was included in either Laramie County (part of the Dakota Territory) or as unorganized territory within the Dakota Territory. Wyoming Territory was established on July 25, 1868, at which time Laramie County was assigned to this jurisdiction. The area now known as Park County was established as Carter County, then Sweetwater County. In 1884 it was assigned to Fremont County; this continued until 1896, when it was assigned to Big Horn County. Wyoming achieved statehood ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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