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Stalicoolithidae
Stalicoolithidae is an oofamily of fossil eggs.Wang Q, Wang X L, Zhao Z K, and Jiang Y G. (2012).A new oofamily of dinosaur egg from the Upper Cretaceous of Tiantai Basin, Zhejiang Province, and its mechanism of eggshell formation Chinese Science Bulletin. 57: 3740-3747. doi: 10.1007/s11434-012-5353-2 History Stalicoolithid eggs were first discovered in 1971, but they were described initially as Dendroolithids,Zhang, S., X. Jin, J.K. O'Conner, M. Wang, and J. Xie. (2015). "A new egg with avian egg shape from the Upper Cretaceous of Zhejiang Province, China." ''Historical Biology'' 27(5):595-602. or as Spheroolithids, in the case of ''"Paraspheroolithus" shizuiwanensis'' and '' Shixingoolithus''. Description Stalicoolithids are distinguished from other oofamilies by several characteristics. Most significantly, they have secondary eggshell units in the outer zone, and three distinct subzones of the columnar layer. They have a unique mix of developmental characteristics, giving ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oofamily
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] |
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] |
Coralloidoolithus
''Coralloidoolithus'' is an oogenus of dinosaur egg from the Tiantai Basin in Zhejiang Province, containing a single known oospecies ''C. shizuiwanensis''. Formerly, it was classified in the oogenus '' Paraspheroolithus''; however, it was considered sufficiently different to be classified in its own genus. ''C. shizuiwanensis'' is similar to ''Stalicoolithus'', leading to their classification in the same family, Stalicoolithidae.Wang Q, Wang X L, Zhao Z K, and Jiang Y G. (2012).A new oofamily of dinosaur egg from the Upper Cretaceous of Tiantai Basin, Zhejiang Province, and its mechanism of eggshell formation Chinese Science Bulletin. 57: 3740-3747. doi: 10.1007/s11434-012-5353-2 History Xixia County was first excavated for fossils by a Geological Team of the Henan Geological Bureau in 1974. Fossils continued to be excavated there, but were not extensively studied until 1994 when Fang ''et al.'' received funding from the National Natural Science Foundation of China. Under this ... [...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] |
Parvoblongoolithus
''Parvoblongoolithus'' is an oogenus of fossil dinosaur egg whose small size and unusual shape suggest the possibility that it is a dwarf egg. Distribution The sole known ''Parvoblongoolithus jinguoensis'' specimen was found in the Upper Cretaceous Chichengshan Formation in Tiantai County, Zhejiang. Description ''Parvoblongoolithus'' known from only a single specimen. It is relatively small (measuring long by wide) with an asymmetrical shape, similar to modern bird eggs. The eggshell is 1.12 mm thick, with the barrel-shaped cones of the mammillary layer making up one-fifth of the total eggshell thickness. The pore system is prolatocanaliculate, meaning the pores vary in width along their length. The pore canals are thick and irregularly shaped. The outer surface of the eggshell is smooth. Despite having a bird-like shape and size, the ''P. jinguoensis'' has a very different microstructure, which bears a closer resemblance to non-avian dinosaur eggs than bird eggs. Most sig ... [...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] |
Stalicoolithus
''Stalicoolithus'' is an oogenus of dinosaur egg from the Sanshui and Chichengshan Formations of the Tiantai Basin in Zhejiang Province. It is known from a single, complete fossil egg, notable for its spherical shape.Wang Q, Wang X L, Zhao Z K, and Jiang Y G. (2012).A new oofamily of dinosaur egg from the Upper Cretaceous of Tiantai Basin, Zhejiang Province, and its mechanism of eggshell formation Chinese Science Bulletin. 57: 3740-3747. doi: 10.1007/s11434-012-5353-2 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 Stalicoolithids Cenomanian life Coniacian life Santonian life Turonian life Dinosaur reproduction Cretaceous China Fossils of China Fossil parataxa described in 2012 {{eggshell-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Science Bulletin
''Science Bulletin'' () is a multidisciplinary scientific journal co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. It is published by Elsevier on behalf of Science in China Press and focuses on research in various fields of the natural sciences. Since 2011, its articles have been published open access under the Creative Commons by Attribution license, but since 2014, only some of its articles may be published under the Creative Commons by Attribution license. According to the ''Journal Citation Reports'', the journal has a 2020 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as i ... of 11.78. References External links * English-language journals Multidisciplinary scientific journals Chinese Academy of Scienc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendroolithidae
''Dendroolithus'' is an oogenus of Dendroolithid dinosaur egg found in the late Cenomanian Chichengshan Formation ( Tiantai Group), in the Gong-An-Zhai and Santonian Majiacun Formations of China and the Maastrichtian Nemegt and Campanian Barun Goyot Formation of Mongolia. They can be up to 162 mm long and 130 mm wide. These eggs may have been laid by a Therizinosaur, Sauropod, or Ornithopod. The oospecies ''"D." shangtangensis'' was originally classified as ''Dendroolithus'', however, it has since been moved to its own distinct oogenus, ''Similifaveoloolithus''.Wang Qiang, Zhao Zi-kui, Wang Xiao-lin, and Jiang Yan-gen. (2011) "New ootypes of dinosaur eggs from the Late Cretaceous in Tiantai Basin, Zhejiang Province, China." ''Vertebrata PalAsiatica'' 49(4):446-449. This oogenus is related with embryos of the theropod ''Torvosaurus ''Torvosaurus'' () is a genus of carnivorous megalosaurid theropod dinosaur that lived approximately 165 to 148 million years ago du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spheroolithidae
Spheroolithidae is an oofamily of dinosaur eggs. It contains ''Guegoolithus'', ''Spheroolithus'', and '' Paraspheroolithus''. Like modern birds, the eggshell membrane formed before the calcareous part of the shell.Z.-K. Zhao. (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. Cambridge. pp. 184–203. 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 Egg fossils Dinosaur reproduction {{Dinosaur-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil Parataxa Described In 2012
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 absolute ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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