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Elongatoolithid
Elongatoolithidae is an oofamily of fossil eggs, representing the eggs of oviraptorosaurs (with the exception of the Bird, avian ''Ornitholithus''). They are known for their highly elongated shape. Elongatoolithids have been found in Europe, Asia, and both North and South America.Simon, D. J. (2014).Giant Dinosaur (theropod) Eggs of the Oogenus Macroelongatoolithus (Elongatoolithidae) from Southeastern Idaho: Taxonomic, Paleobiogeographic, and Reproductive Implications. (Doctoral dissertation, Montana State University, Bozeman). Distribution Elongatoolithids have a very broad distribution. They have been found across Asia and the US, as well as in Spain, France, and Argentina, with ages ranging from lower Cretaceous to the Paleocene. Description Elongatoolithids are, as their name suggests, highly elongated eggs; they are at least twice as long as they are wide. They vary widely in size, ranging from the 7 cm long ''Elongatoolithus chichengshanensis'' to the gigantic 60 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Macroolithus
''Macroolithus'' is an oogenus (fossil-egg genus) of dinosaur egg belonging to the oofamily Elongatoolithidae. The Type (biology), type oospecies, ''M. rugustus'', was originally described under the now-defunct oogenus name ''Oolithes''. Three other oospecies are known: ''M. yaotunensis'', ''M. mutabilis'', and ''M. lashuyuanensis''. They are relatively large, elongated eggs with a two-layered eggshell. Their nests consist of large, concentric rings of paired eggs. There is evidence of blue-green pigmentation in its shell, which may have helped camouflage the nests. ''Macroolithus'' eggs have been found containing oviraptorid dinosaur embryos resembling ''Heyuannia''. Multiple other associations between oviraptorid and elongatoolithids (including other eggs containing embryos, parents brooding on nests, and a pair of shelled ''Macroolithus''-like eggs preserved within an oviraptorid's pelvis) confirm that the parent of ''Macroolithus'' was an oviraptorid. It is found in Upper Cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Elongatoolithus
''Elongatoolithus'' is an oogenus of dinosaur eggs found in the Late Cretaceous formations of China and Mongolia. Like other elongatoolithids, they were laid by small theropods (probably oviraptorosaurs), and were cared for and incubated by their parents until hatching. They are often found in nests arranged in multiple layers of concentric rings. As its name suggests, ''Elongatoolithus'' was a highly elongated form of egg. It is historically significant for being among the first fossil eggs given a parataxonomic name. Description ''Elongatoolithus'' eggs are small to midsized eggs, with a maximum size of about . The eggs are highly elongated, typically being 2 to 2.2 times longer than they are wide, and slightly asymmetric (with one end pointier than the other). The outer surface of their shells is ornamented with a fine pattern of nodes and ridges, either aligned parallel to the egg's long axis (lineartuberculate ornamentation) or in irregular chains (ramotuberculare ornamentat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Undulatoolithus
''Undulatoolithus'' is an oogenus of Chinese fossil dinosaur egg belonging to Elongatoolithidae. It is very similar to ''Macroolithus'', but has different ornamentation. Like other elongatoolithids, it was probably laid by oviraptorosaurs.Q. Wang, Z. Zhao, X. Wang, N. Li, and S. Zou. (2013A new form of Elongatoolithidae, Undulatoolithus pengi oogen. et oosp. nov. from Pingxiang, Jiangxi, China.''Zootaxa'' 3746(1):194-200 Distribution ''Undulatoolithus'' is found in the Zhoutian Formation, in the Pingxiang Basin of Jiangxi. It is dated to the Upper Cretaceous. History The Pingxiang Basin, in Jiangxi, was first excavated for fossils in 2002. Several fossil eggs, egg clutches, and dinosaur bones were discovered, including those later described as ''Undulatoolithus'' in 2013 by Chinese paleontologists Wang Qiang, Zhao Zikui, Wang Xiaolin, Li Ning, and Zou Songlin. The type and only known specimen of ''Undulatoolithus'' was the first elongatoolithid egg clutch discovered in the Pi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Macroelongatoolithus
''Macroelongatoolithus'' is an oogenus of large theropod dinosaur eggs, representing the eggs of giant caenagnathid oviraptorosaurs. They are known from Asia and from North America. Historically, several oospecies have been assigned to ''Macroelongatoolithus'', however they are all now considered to be a single oospecies: ''M. carlylensis''. History of discovery ''"Oolithes" carlylensis'' was described in 1970 in paleontology, 1970 by James A. Jensen, James Jensen.Jensen J. 1970. Fossil eggs in the lower cretaceous of Utah. ''Brigham Young University research studies. Geology Series. Geology Studies'' 17: 51-65. In 1998 in paleontology, 1998, ''O. carlylensis'' was moved to a new oogenus, ''Boletuoolithus'', which was then classified as a Spheroolithidae, Spheroolithid.Bray, E. S. 1998. Dinosaur eggshell ''Boletuoolithus carlylensis'', oogen. nov. from the Lower Cretaceous Cedar Mountain Formation of Utah; pp. 221–223 in S. G. Lucas, J. I. Kirkland, and J. W. Estep (eds.), Lowe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Nanhsiungoolithus
''Nanhsiungoolithus'' is an oogenus (fossil-egg genus) of dinosaur egg from the late Cretaceous of China. It belongs to the oofamily Elongatoolithidae, which means that it was probably laid by an oviraptorosaur, though so far no skeletal remains have been discovered in association with ''Nanhsiungoolithus''. The oogenus contains only a single described oospecies, ''N. chuetienensis''. It is fairly rare, only being know from two partially preserved nests and a few eggshell fragments. Description The type specimen of ''Nanhsiungoolithus'' is a partial nest containing three mostly complete eggs and impressions. Another partial nest preserves two whole eggs, two incomplete eggs, and two impressions. Like other elongatoolithids, the eggs are found arranged in a circular pattern. The eggs are long and narrow, with an average length of and width of . They are slightly asymmetrical, with one end slightly pointier than the other. ''Nanhsiungoolithus'' is distinctive for the smooth textu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Protoceratops
''Protoceratops'' (; ) is a genus of small protoceratopsid dinosaurs that lived in Asia during the Late Cretaceous, around 75 to 71 million years ago. The genus ''Protoceratops'' includes two species: ''P. andrewsi'' and the larger ''P. hellenikorhinus''. The former was described in 1923 with fossils from the Mongolian Djadokhta Formation, and the latter in 2001 with fossils from the Chinese Bayan Mandahu Formation. ''Protoceratops'' was initially believed to be an ancestor of ankylosaurians and larger ceratopsians, such as ''Triceratops'' and relatives, until the discoveries of other protoceratopsids. Populations of ''P. andrewsi'' may have evolved into ''Bagaceratops rozhdestvenskyi'' through anagenesis. ''Protoceratops'' were small ceratopsians, up to long and around in body mass. While adults were largely quadrupedal, juveniles had the capacity to walk around Facultative bipedalism, bipedally if necessary. They were characterized by a proportionally large skull, short and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Citipati Embryo
''Citipati'' (; meaning "funeral pyre lord") is a genus of oviraptorid dinosaur that lived in Asia during the Late Cretaceous Period (geology), period, about 75 million to 71 million years ago. It is mainly known from the Ukhaa Tolgod locality at the Djadochta Formation, where the first remains were collected during the 1990s. The genus and type species ''Citipati osmolskae'' were named and described in 2001. A second species from the adjacent Zamyn Khondt locality may also exist. ''Citipati'' is one of the best-known oviraptorids thanks to a number of well-preserved specimens, including individuals found in Avian incubation, brooding positions atop nests of eggs, though most of them were initially referred to the related ''Oviraptor''. These nesting specimens have helped to solidify the link between non-avian dinosaurs and birds. ''Citipati'' was among the largest oviraptorids; it is estimated to have been around in length and to have weighed . Its skull was highly Skeletal p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Paraelongatoolithus
''Paraelongatoolithus'' is a late Cretaceous oogenus of Chinese fossil egg, classified in the oofamily Elongatoolithidae, which represents the eggs of oviraptorosaurs. Distribution ''Paraelongatoolithus'' is known solely from Chengguan, Tiantai. The fossil is from the Chichengshan Formation, which is dated to 91–94 million years ago, during the Turonian.He, H., Wang, X., Wang, Q., Jiang, S., Cheng, X., Zhang, J., ... & Deng, C. (2013).SIMS zircon U–Pb dating of the Late Cretaceous dinosaur egg-bearing red deposits in the Tiantai Basin, southeastern China. ''Journal of Asian Earth Sciences,'' 62, 654-661. Discovery Fossil eggs are very common in the Tiantai basin, and were first discovered there in the 1950s. Due to better infrastructure, in the 2000s numerous new types of fossil eggs have been discovered in Tiantai. ''Paraelongatoolithus'' was first discovered and named in 2010 by the Chinese paleontologists Wang Qiang, Wang Xiaolin, Zhao Zikui, and Jiang Yan'gen. Descript ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Rodolphoolithus
''Rodolphoolithus'' is an oogenus of elongatoolithid egg native to the Irbzer Formation of Morocco. It is known only from a single partial egg and several eggshell fragments, but it probably had a highly elongated shape like other Elongatoolithids. They have an eggshell with two layers: a mamillary layer and a continuous layer. The mamillary layer is relatively thick (compared to other Elongatoolithids); it is one-half to two-thirds the thickness of the continuous layer. The ornamentation of its outer surface is ramotuberculate, i.e. covered with low, irregular ridges. The pore system cannot be observed due to recrystallization of the fossilized eggshell. Like other Elongatoolithids, ''Rodolphoolithus'' was laid by small theropod Theropoda (; from ancient Greek , (''therion'') "wild beast"; , (''pous, podos'') "foot"">wiktionary:ποδός"> (''pous, podos'') "foot" is one of the three major groups (clades) of dinosaurs, alongside Ornithischia and Sauropodom ...s. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Oviraptor
''Oviraptor'' (; ) is a genus of oviraptorid dinosaur that lived in Asia during the Late Cretaceous period. The first remains were collected from the Djadokhta Formation of Mongolia in 1923 during a paleontological expedition led by Roy Chapman Andrews, and in the following year the genus and type species ''Oviraptor philoceratops'' were named by Henry Fairfield Osborn. The genus name refers to the initial thought of egg-stealing habits, and the specific name was intended to reinforce this view indicating a preference over ceratopsian eggs. Despite the fact that numerous specimens have been referred to the genus, ''Oviraptor'' is only known from a single partial skeleton regarded as the holotype, as well as a nest of about fifteen eggs and several small fragments from a juvenile. ''Oviraptor'' was a rather small feathered oviraptorid, estimated at long with a weight between . It had a wide lower jaw with a skull that likely had a crest. Both upper and lower jaws were toothless ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Lower Cretaceous
Lower may refer to: * ''Lower'' (album), 2025 album by Benjamin Booker * Lower (surname) * Lower Township, New Jersey *Lower Receiver (firearms) * Lower Wick Gloucestershire, England See also * Nizhny {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Egg Clutch
A clutch of eggs is the group of eggs produced by birds, amphibians, or reptiles, often at a single time, particularly those laid in a nest. In birds, destruction of a clutch by predators (or removal by humans, for example the California condor breeding program) results in ''double-clutching''. The technique is used to double the production of a species' eggs, in the California condor case, specifically to increase population size. Size Clutch size differs greatly between species, sometimes even within the same genus. It may also differ within the same species due to many factors including habitat, health, nutrition, predation pressures, and time of year. Clutch size variation can also reflect variation in optimal reproduction effort. In birds, clutch size can vary within a species due to various features (age and health of laying female, ability of male to supply food, and abundance of prey), while some species are determinant layers, laying a species-specific number of eggs. Lon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
