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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] |
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] |
Elongatoolithidae
Elongatoolithidae is an oofamily of fossil eggs, representing the eggs of oviraptorosaurs (with the exception of the 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 cm ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macroolithus
''Macroolithus'' is an oogenus (fossil-egg genus) of dinosaur egg belonging to the oofamily Elongatoolithidae. The 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 Cretaceous format ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
List Of Dinosaur Oogenera
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] |
Late Cretaceous
The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the Latin word for the white limestone known as chalk. The chalk of northern France and the white cliffs of south-eastern England date from the Cretaceous Period. Climate During the Late Cretaceous, the climate was warmer than present, although throughout the period a cooling trend is evident. The tropics became restricted to equatorial regions and northern latitudes experienced markedly more seasonal climatic conditions. Geography Due to plate tectonics, the Americas were gradually moving westward, causing the Atlantic Ocean to expand. The Western Interior Seaway divided North America into eastern and western halves; Appalachia and Laramidia. India maintained a northward course towards Asia. In the Southern Hemisphere, Australia and Ant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prismatoolithus
''Prismatoolithus'' is an oogenus of dinosaur egg from the Cretaceous (Hauterivian-Maastrichtian) and possibly also the earliest Paleocene. They likely belonged to troodontids Troodontidae is a clade of bird-like theropod dinosaurs. During most of the 20th century, troodontid fossils were few and incomplete and they have therefore been allied, at various times, with many dinosaurian lineages. More recent fossil discov ...Mateus, I, H Mateus, MT Antunes, O Mateus, P Taquet, V Ribeiro, G Manuppella. 1998. Upper Jurassic theropod dinosaur embryos from Lourinhã (Portugal). Memórias da Academia das Ciências de Lisboa 37, 101-110 References Dinosaur reproduction Egg fossils Fossils of Canada Paleontology in Alberta Fossils of China Fossils of France Fossils of Japan Fossils of Mexico Fossils of Morocco Fossils of Spain Tremp Formation Fossils of the United States Paleontology in Montana Paleontology in New Mexico Paleontology in Utah Milk River Formation Fos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stromatoolithus
''Stromatoolithus'' is an oogenus of dinosaur egg. The oogenus contains one oospecies, ''S. pinglingensis''. ''Stromatoolithus''at Fossilworks.org See also * List of dinosaur oogenera 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 t ... References Bibliography * Carpenter, K. 1999. Eggs, Nests, and Baby Dinosaurs: A Look at Dinosaur Reproduction (Life of the Past). Indiana University Press, Bloomington, Indiana * Z. Zhao, J. Ye, H. Li, Z. Zhao, and Z. Yan. 1991. Extinction of the dinosaurs across the Cretaceous-Tertiary boundary in Nanxiong Basin, Guangdong Province. Vertebrata PalAsiatica 29(1):1-20 Dinosaur reproduction Fossil parataxa described in 1991 {{eggshell-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ovaloolithus
''Ovaloolithus'' is an oogenus of dinosaur egg. Eggs of the genus have been found in China, Mongolia and Utah. Species Oospecies attributed to this genus include:''Ovaloolithus'' in the * ''O. chinkangkouensis'' - - , Mongolia, |
Coniacian
The Coniacian is an age or stage in the geologic timescale. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series and spans the time between 89.8 ± 1 Ma and 86.3 ± 0.7 Ma (million years ago). The Coniacian is preceded by the Turonian and followed by the Santonian. Stratigraphic definitions The Coniacian is named after the city of Cognac in the French region of Saintonge. It was first defined by French geologist Henri Coquand in 1857. The base of the Coniacian Stage is at the first appearance of the inoceramid bivalve species '' Cremnoceramus deformis erectus''. The official reference profile for the base (a GSSP) is located in Salzgitter-Salder, Lower Saxony, Germany. The top of the Coniacian (the base of the Santonian Stage) is defined by the appearance of the inoceramid bivalve ''Cladoceramus undulatoplicatus''. The Coniacian overlaps the regional Emscherian Stage of Germany, which is roughly coeval with the Coniacian and Santonian Stages. In magne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shixingoolithus
''Shixingoolithus'' is an oogenus of dinosaur egg from the Cretaceous of Nanxiong, China.Z. Zhao, J. Ye, H. Li, Z. Zhao, and Z. Yan. 1991. Extinction of the dinosaurs across the Cretaceous-Tertiary boundary in Nanxiong Basin, Guangdong Province. Vertebrata PalAsiatica 29(1):1-20Carpenter, K. 1999. Eggs, Nests, and Baby Dinosaurs: A Look at Dinosaur Reproduction (Life of the Past). Indiana University Press, Bloomington, Indiana. Description ''Shixingoolithus'' eggs are nearly spherical, and about 12 cm in diameter, with a shell thickness of 2.3-2.6 mm. The shell is made up of tall, prismatic units, and has narrow, irregular pore canals. Its cone layer (mammillae) is approximately a fourth of the shell thickness.Zhao, Z.K. (1994). "Dinosaur eggs in China: On the structure and evolution of eggshells." In K. Carpenter, K. F. Hirsch, and J. R. Horner (eds.), Dinosaur Eggs and Babies, Cambridge University Press, Cambridge. In K. Carpenter, K. F. Hirsch, and J. R. Horner (eds.), Dino ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nanxiong Basin
Nanxiong (), historically Namyung, Namhung, and Nanhsiung, is a county-level city of northern Guangdong province, People's Republic of China, bordering Jiangxi to the north, east and southeast. It is under the administration of Guangdong Guangdong (, ), alternatively romanized as Canton or Kwangtung, is a coastal province in South China on the north shore of the South China Sea. The capital of the province is Guangzhou. With a population of 126.01 million (as of 2020) ... Province. Climate References County-level cities in Guangdong Shaoguan {{Guangdong-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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