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Sphaerovum
''Sphaerovum'' is an oogenus of dinosaur egg that has only been discovered in South America. History ''Sphaerovum'' was first described, along with '' Tacuarembovum'', in 1980 by paleontologist Alvaro Mones, following their discovery at the Asencio Formation in Uruguay. This was one of the first discoveries of fossil dinosaur eggs in South America.Mones, A. (1980) "Nuevos elementos de la paleoherpetofauna del Uruguay (Crocodilia y Dinosauria)." ''Actas II Congreso Argentino de Paleontologia y Bioestratigrafia y I Congreso Latinoamericano, Buenos Aires'' 1:265-277 (in Spanish) Distribution Fossils of ''Sphaerovum'' and ''Sphaerovum''-like eggs are known from the Puerto Yeruá, Allen and Colorado Formations in Argentina and the Guichón and Asencio Formations of Uruguay. They are always found in Campanian- or Maastrichtian-aged rocks, leading to their use as index fossils. Description ''Sphaerovum'' eggs are 15-20 cm in diameter, with a shell between 4.2 and 5.5 mm thick. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faveoloolithidae
Faveoloolithidae is an oofamily of dinosaur eggs. It contains ''Faveoloolithus'', ''Hemifaveoloolithus'', ''Parafaveoloolithus'', and probably ''Sphaerovum''. However, unlike the other Faveoloolthids, ''Sphaerovum'' has compactituberculate ornamentation more similar to megaloolithids. Like Dictyoolithidae, the membrane and the calcareous part of the eggshell formed simultaneously instead of forming the membrane before the calcareous like modern birds.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 ... Ref ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Puerto Yeruá Formation
The Puerto Yeruá Formation is a Late Cretaceous geologic formation in the Paraná Basin, pertaining to Entre Ríos Province, Argentina. Dinosaur remains are among the fossils that have been recovered from the formation,Weishampel et al., 2004, pp.517-607 as well as egg fragments and fossilized wood. Description The formation comprises red claystones and grey sandstones, medium-thick, well silicified, partly conglomeratic, whitish and reddish color thanks to the presence of iron oxides and frequently calcareous cement. It was deposited in a lacustrine to floodplain humid environment with seasonal rainfall. Fossils of '' cf. Sphaerovum erbeni'' (Faveoloolithidae),De Valais et al., 2003, p.509 Theropoda indet.,De Valais et al., 2003, p.508 and Ankylosauria indet. are reported from the formation.De Valais et al., 2003, p.507 [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guichón Formation
The Guichón Formation is a Late Cretaceous geologic formation of the Paysandú Group in Uruguay. Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel et al., 2004, pp.517-607 Description The Guichón Formation comprises mainly pink-greyish to reddish sandstones, which contain moderate to well-sorted, subrounded, fine to medium-sized grains in a pelitic matrix. These sandstones (which compositionally are feldspathic wackes) are either massive or may instead exhibit parallel lamination, cross-lamination and graded bedding. These lithologies were deposited in southwest-trending alluvial–fluvial systems comprising low-sinuosity channels traversing through sandy plains. Subordinate to the already mentioned sandstones are conglomeratic and pelitic lithologies, interpreted as channel-fill and overbank deposits, respectively. It is inferred that the Guichón Formation was deposited in warm, semi-arid climatic conditions. The formation has been ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colorado Formation, Argentina
The Colorado Formation is a Late Cretaceous ( Campanian to Maastrichtian geologic formation that is exposed within the Colorado Basin in the southeastern part of La Pampa Province, Argentina. Fossil dinosaur eggs of '' Sphaerovum erbeni'' have been reported from the nonmarine, fluvial strata of this formation.Casadio, S., T. Manera, A. Parras, C. L. Montalvo (2002) ''Huevos de dinosaurios (Faveoloolithidae) del Cretácico superior de la Cuenca del Colorado, Provincia de La Pampa, Argentina.'' Ameghiniana. 39(3):285–293. Description The formation overlies the Paleozoic basement and has an estimated thickness of .López, 2017, p.19 The Colorado Formation comprises medium-grained sandstones with intercalated conglomerates with pebbly beds that can be interpreted as fluvial to alluvial deposits. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asencio Formation
The Asencio Formation is a geological formation in the Paraná Basin of southwestern Uruguay whose strata date back to the Late Cretaceous (Campanian-Maastrichtian). Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel et al., 2004, pp. 600-604 Vertebrate paleofauna * ''Neuquensaurus australis'' * '' Laplatasaurus araukanicus'' * '' Antarctosaurus wichmannianus''Drable-Palmitas at .org Fossil eggs * '' Sphaerovum erbeni''Mones, A. (1980) "Nuevos elementos de la paleoherpetofauna del Uruguay (Crocodilia ...[...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 provis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinosaur Egg
Dinosaur eggs are the organic vessels in which a dinosaur embryo develops. When the first scientifically documented remains of non-avian dinosaurs were being described in England during the 1820s, it was presumed that dinosaurs had laid eggs because they were reptiles. In 1859, the first scientifically documented dinosaur egg fossils were discovered in France by Jean-Jacques Poech, although they were mistaken for giant bird eggs (birds were not yet recognized as dinosaurs at the time). The first scientifically recognized non-avian dinosaur egg fossils were discovered in 1923 by an American Museum of Natural History crew in Mongolia. Dinosaur eggshell can be studied in thin section and viewed under a microscope. The interior of a dinosaur egg can be studied using CAT scans or by gradually dissolving away the shell with acid. Sometimes the egg preserves the remains of the developing embryo inside. The oldest known dinosaur eggs and embryos are from '' Massospondylus'', which l ... [...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] |
Saltasaurid
Saltasauridae (named after the Salta region of Argentina where they were first found) is a family of armored herbivorous sauropods from the Upper Cretaceous. They are known from fossils found in South America, Asia, North America, and Europe. They are characterized by their vertebrae and feet, which are similar to those of '' Saltasaurus'', the first of the group to be discovered and the source of the name. The last and largest of the group and only one found in North America, ''Alamosaurus'', was in length and one of the last sauropods to go extinct. Most of the saltasaurids were smaller, around in length, and one, ''Rocasaurus'', was only long. Like all sauropods, the saltasaurids were quadrupeds, their necks and tails were held almost parallel to the ground, and their small heads had only tiny, peg-like teeth. They were herbivorous, stripping leaves off of plants and digesting them in their enormous guts. Although large animals, they were smaller than other sauropods ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ameghiniana
''Ameghiniana'' is a peer-reviewed scientific journal covering palaeontology published by the Asociación Paleontológica Argentina. It is named after the 19th century Italian Argentine palaeontologist Florentino Ameghino. The discovery of many dinosaurs found in Argentina and South America have first been published in ''Ameghiniana''; examples of this are ''Argentinosaurus'' and ''Herrerasaurus ''Herrerasaurus'' is a genus of saurischian dinosaur from the Late Triassic period. This genus was one of the earliest dinosaurs from the fossil record. Its name means "Herrera's lizard", after the rancher who discovered the first specimen in ...''. Abstracting and indexing The journal is abstracted and indexed in: References External links * Asociación Paleontológica Argentina Paleontology journals Geology of Argentina Publications established in 1957 Multilingual journals Quarterly journals Academic journals published by learned and professional societies of Arge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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