|
Euaspidoceras Ajax
''Euaspidoceras'' is an extinct ammonoid cephalopod genus that lived during the Middle Jurassic. Ancestor of ''Euaspidoceras'' is probably ''Aspidoceras''. It is considered related to genera like ''Orthaspidoceras'', '' Simaspidoceras'', and '' Intranodites''. Species *'' Euaspidoceras ajax'' Leanza 1947 *''Euaspidoceras davouxi'' Bert and Bonnot 2004 *''Euaspidoceras babeanum ''Euaspidoceras babeanum'' is an extinct ammonoid-cephalopod species that lived during the Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triass ...'' d’Orbigny, 1848 *'' Euaspidoceras perarmatum'' J. Sowerby, 1822 *'' Euaspidoceras veranadaense'' Parent 2006 Distribution ''Euaspidoceras'' species may be found in the Jurassic of Argentina, France, Germany, India, Italy, Madagascar, Saudi Arabia, Spain, the United Kingdom and Yemen. References ;Notes ;Bibliography *Arkell, et al.,1957. Mesozoic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Middle Jurassic
The Middle Jurassic is the second epoch of the Jurassic Period. It lasted from about 174.1 to 163.5 million years ago. Fossils of land-dwelling animals, such as dinosaurs, from the Middle Jurassic are relatively rare, but geological formations containing land animal fossils include the Forest Marble Formation in England, the Kilmaluag Formation in Scotland,British Geological Survey. 2011Stratigraphic framework for the Middle Jurassic strata of Great Britain and the adjoining continental shelf: research report RR/11/06 British Geological Survey, Keyworth, Nottingham. the Daohugou Beds in China, the Itat Formation in Russia, and the Isalo III Formation of western Madagascar. Paleogeography During the Middle Jurassic Epoch, Pangaea began to separate into Laurasia and Gondwana, and the Atlantic Ocean formed. Eastern Laurasia was tectonically active as the Cimmerian plate continued to collide with Laurasia's southern coast, completely closing the Paleo-Tethys Ocean. A subduction zone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspidoceras
''Aspidoceras'' is an extinct ammonoid cephalopod genus belonging to the family Aspidoceratidae. Taxonomy ''Aspidoceras'', named by Zittel, 1868, is the type genus for the persphictacian family Aspidoceratidae and subfamily Aspidoceratinae in which it is included. It is considered related to genera like '' Chinamecaceras'', '' Cubaspidoceras'', '' Euaspidoceras'', '' Extranodites'', '' Intranodites'', '' Neaspidoceras'', '' Oligopsychopsis'', ''Orthaspidoceras'', '' Schaireria'' and '' Simaspidoceras''. Selected species *† ''Aspidoceras argobbae'' Dacque 1905 *†'' Aspidoceras catalaunicum'' Loriol 1872 *† ''Aspidoceras somalicum'' Dacque 1905 *†'' Aspidoceras supraspinosum'' Dacque 1905 Fossil record ''Aspidoceras'' mainly lived during the Late Jurassic ( Oxfordian) until Cretaceous (Berriasian), with a fairly broad distribution. Fossils have been found in Italy, Chile, Spain, Algeria, Antarctica, Argentina, Ethiopia, France, Germany, Hungary, India, Iran, Madagascar, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orthaspidoceras
''Orthaspidoceras'' is an extinct ammonoid cephalopod genus belonging to the family Aspidoceratidae. These nektonic carnivores lived during the Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ... period, Kimmeridgian age.Sepkoski, JacSepkoski's Online Genus Database – Cephalopoda Description Shells of ''Orthaspidoceras'' are medium or large-sized, with a diameter reaching about . These shells are relatively involute and thick, with a quadrate-rounded or depressed whorls. The ornamentation consists of a row of coarse tubercles and fine streaks. Distribution Jurassic deposites of Italy, Mexico, Switzerland and Yemen [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euaspidoceras Ajax
''Euaspidoceras'' is an extinct ammonoid cephalopod genus that lived during the Middle Jurassic. Ancestor of ''Euaspidoceras'' is probably ''Aspidoceras''. It is considered related to genera like ''Orthaspidoceras'', '' Simaspidoceras'', and '' Intranodites''. Species *'' Euaspidoceras ajax'' Leanza 1947 *''Euaspidoceras davouxi'' Bert and Bonnot 2004 *''Euaspidoceras babeanum ''Euaspidoceras babeanum'' is an extinct ammonoid-cephalopod species that lived during the Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triass ...'' d’Orbigny, 1848 *'' Euaspidoceras perarmatum'' J. Sowerby, 1822 *'' Euaspidoceras veranadaense'' Parent 2006 Distribution ''Euaspidoceras'' species may be found in the Jurassic of Argentina, France, Germany, India, Italy, Madagascar, Saudi Arabia, Spain, the United Kingdom and Yemen. References ;Notes ;Bibliography *Arkell, et al.,1957. Mesozoic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euaspidoceras Davouxi
''Euaspidoceras'' is an extinct ammonoid cephalopod genus that lived during the Middle Jurassic. Ancestor of ''Euaspidoceras'' is probably ''Aspidoceras''. It is considered related to genera like ''Orthaspidoceras'', '' Simaspidoceras'', and '' Intranodites''. Species *'' Euaspidoceras ajax'' Leanza 1947 *'' Euaspidoceras davouxi'' Bert and Bonnot 2004 *''Euaspidoceras babeanum ''Euaspidoceras babeanum'' is an extinct ammonoid-cephalopod species that lived during the Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triass ...'' d’Orbigny, 1848 *'' Euaspidoceras perarmatum'' J. Sowerby, 1822 *'' Euaspidoceras veranadaense'' Parent 2006 Distribution ''Euaspidoceras'' species may be found in the Jurassic of Argentina, France, Germany, India, Italy, Madagascar, Saudi Arabia, Spain, the United Kingdom and Yemen. References ;Notes ;Bibliography *Arkell, et al.,1957. Mesozoi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euaspidoceras Babeanum
''Euaspidoceras babeanum'' is an extinct ammonoid-cephalopod species that lived during the Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ... period. Fossils of ''Euaspidoceras babeanum'' may be found in the Upper Jurassic, Oxfordian stage of France, around 154 to 146 million years ago. Description ''Euaspidoceras babeanum'' has a shell reaching up to of diameter. References Jurassic ammonites Aspidoceratidae {{Ammonitina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euaspidoceras Perarmatum
''Euaspidoceras perarmatum'' is an extinct ammonoid cephalopod species that lived during the Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J .... Fossils of ''Euaspidoceras perarmatum'' may be found in the upper Jurassic, Oxfordian stage of France, Germany, Russia and Saudi Arabia, around 154 to 146 million years ago. Description ''Euaspidoceras perarmatum'' has a shell reaching up to of diameter. References Jurassic ammonites Aspidoceratidae {{Ammonitina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euaspidoceras Veranadaense
''Euaspidoceras'' is an extinct ammonoid cephalopod genus that lived during the Middle Jurassic. Ancestor of ''Euaspidoceras'' is probably ''Aspidoceras''. It is considered related to genera like ''Orthaspidoceras'', '' Simaspidoceras'', and '' Intranodites''. Species *''Euaspidoceras ajax'' Leanza 1947 *''Euaspidoceras davouxi'' Bert and Bonnot 2004 *''Euaspidoceras babeanum ''Euaspidoceras babeanum'' is an extinct ammonoid-cephalopod species that lived during the Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triass ...'' d’Orbigny, 1848 *'' Euaspidoceras perarmatum'' J. Sowerby, 1822 *'' Euaspidoceras veranadaense'' Parent 2006 Distribution ''Euaspidoceras'' species may be found in the Jurassic of Argentina, France, Germany, India, Italy, Madagascar, Saudi Arabia, Spain, the United Kingdom and Yemen. References ;Notes ;Bibliography *Arkell, et al.,1957. Mesozoic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jurassic Ammonites
The Jurassic ( ) is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The Jurassic constitutes the middle period of the Mesozoic Era and is named after the Jura Mountains, where limestone strata from the period were first identified. The start of the Jurassic was marked by the major Triassic–Jurassic extinction event, associated with the eruption of the Central Atlantic Magmatic Province. The beginning of the Toarcian Stage started around 183 million years ago and is marked by an extinction event associated with widespread oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and is the only boundary between geological periods to remain formally undefined. By the beginning of the Jurassic, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ammonites Of Europe
Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to living coleoids (i.e., octopuses, squid and cuttlefish) than they are to shelled nautiloids such as the living ''Nautilus'' species. The earliest ammonites appeared during the Devonian, with the last species vanishing during the Cretaceous–Paleogene extinction event. Ammonites are excellent index fossils, and linking the rock layer in which a particular species or genus is found to specific geologic time periods is often possible. Their fossil shells usually take the form of planispirals, although some helically spiraled and nonspiraled forms (known as heteromorphs) have been found. The name "ammonite", from which the scientific term is derived, was inspired by the spiral shape of their fossilized shells, which somewhat resemble tightly coiled rams' horns. Pliny the Elder ( 79 AD near Pompe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
