Aspidoceratinae

	Aspidoceratinae The Aspidoceratinae is a subfamily in the perisphictacean ammonite family, Aspidoceratidae found world wide in middle and upper Jurassic sediments. Aspidoceratinae differ from Peltoceratinae in that the early biplicate ribbed stage is lacking, or greatly reduced, and no forms with lappets are known. Aptycus are bivalved and very durable, and in the "lower Kimmeridgian form Aptychus beds, containing few or no ammonites". (Kimmeridgian is middle Upper Jurassic, follows the Oxfordian and predates the Tithonian). The earliest Aspidoceratinae occur with the first Peltoceratinae, and likewise are probably derived from within the Perisphinctidae Perisphinctidae is a family of Middle and Upper Jurassic discoidal ammonites in the order Ammonitida. They have a shell morphology that is mostly evolute, typically with biplicate, simple, or triplicate ribbing. Large forms have simple aperture ... References ;Notes ;Bibliography * Arkell, et al., 1957. Mesozoic Ammonoidea. Treatise on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Aspidoceratidae The Aspidoceratidae comprise a family of middle and upper Jurassic ammonites that make up part of the superfamily Perisphinctoidea, characterized by evolute shells, commonly stocky, that tend to develop tubercles. The Aspidoceratidae are thought to be derived from the Perisphinctidae and have been subdivided into three subfamilies, the Aspidoceratinae, Peltoceratinae, and Simoceratinae. Subfamilies and genera * Aspidoceratinae Zittel 1895 '' Aspidoceras'' '' Chinamecaceras'' Cantu-Chapa 2006 ''Epaspidoceras'' '' Euaspidoceras'' ** ''Orthaspidoceras'' * Peltoceratinae Spath 1924 ''Peltoceras'' '' Peltoceratoides'' ** ''Rursiceras'' * Simoceratinae The Simoceratinae is a subfamily in the Aspidoceratidae The Aspidoceratidae comprise a family of middle and upper Jurassic ammonites that make up part of the superfamily Perisphinctoidea, characterized by evolute shells, commonly stocky, tha ... '' Simoceras'' '' Virgatosimoceras'' References * Arkel ... [...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]
	Euaspidoceras ''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 ''Orthaspidoceras'' is an extinct ammonoid cephalopod genus belonging to the family Aspidoceratidae. These nektonic carnivores lived during the Jurassic period, Kimmeridgian In the geologic timescale, the Kimmeridgian is an age in the Late J ...'', '' Simaspidoceras'', and '' Intranodites''. Species '' Euaspidoceras ajax'' Leanza 1947 '' Euaspidoceras davouxi'' Bert and Bonnot 2004 '' Euaspidoceras babeanum'' 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. Mesozo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Perisphinctaceae Perisphinctoidea, formerly Perisphinctaceae, is a superfamily of Middle Jurassic (Bajocian) to Lower Cretaceous (Barremian) ammonites, commonly with evolute shells with strong ribbing that typically divides about mid flank before crossing the venter. Classification Some 16 families have been recognized in the Perisphinctoidea. The following is based on Donovan ''et al.'' 1981Donovan, Callomon and Howarth 1981 Classification of the Jurassic Ammonitina; Systematics Association. with modification from the Treatise on Invertebrate Paleontology, Part L (1957) Perisphinctidae: Middle and Upper Jurassic root stock, derived from the Stephanoceratidae (Middle Jurassic direct derivatives of the Perisphinctidae) Morphiceratidae * Tulitidae Reineckeiidae Pachyceratidae Aspidoceratidae (early Upper Jurassic (Oxfordian) derivatives of Perisphinctidae) Aulacostephanidae Ataxioceratidae (mid Upper Jurassic (Kimmeridgian) derivatives of the Ataxioceratidae) Dorsoplanitidae * V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	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 Jurassic constitutes the middle period of the Mesozoic, 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, 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 Anoxic event, oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar, Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]

	Aspidoceratinae The Aspidoceratinae is a subfamily in the perisphictacean ammonite family, Aspidoceratidae found world wide in middle and upper Jurassic sediments. Aspidoceratinae differ from Peltoceratinae in that the early biplicate ribbed stage is lacking, or greatly reduced, and no forms with lappets are known. Aptycus are bivalved and very durable, and in the "lower Kimmeridgian form Aptychus beds, containing few or no ammonites". (Kimmeridgian is middle Upper Jurassic, follows the Oxfordian and predates the Tithonian). The earliest Aspidoceratinae occur with the first Peltoceratinae, and likewise are probably derived from within the Perisphinctidae Perisphinctidae is a family of Middle and Upper Jurassic discoidal ammonites in the order Ammonitida. They have a shell morphology that is mostly evolute, typically with biplicate, simple, or triplicate ribbing. Large forms have simple aperture ... References ;Notes ;Bibliography * Arkell, et al., 1957. Mesozoic Ammonoidea. Treatise on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Aspidoceratidae The Aspidoceratidae comprise a family of middle and upper Jurassic ammonites that make up part of the superfamily Perisphinctoidea, characterized by evolute shells, commonly stocky, that tend to develop tubercles. The Aspidoceratidae are thought to be derived from the Perisphinctidae and have been subdivided into three subfamilies, the Aspidoceratinae, Peltoceratinae, and Simoceratinae. Subfamilies and genera * Aspidoceratinae Zittel 1895 '' Aspidoceras'' '' Chinamecaceras'' Cantu-Chapa 2006 ''Epaspidoceras'' '' Euaspidoceras'' ** ''Orthaspidoceras'' * Peltoceratinae Spath 1924 ''Peltoceras'' '' Peltoceratoides'' ** ''Rursiceras'' * Simoceratinae The Simoceratinae is a subfamily in the Aspidoceratidae The Aspidoceratidae comprise a family of middle and upper Jurassic ammonites that make up part of the superfamily Perisphinctoidea, characterized by evolute shells, commonly stocky, tha ... '' Simoceras'' '' Virgatosimoceras'' References * Arkel ... [...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]
	Euaspidoceras ''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 ''Orthaspidoceras'' is an extinct ammonoid cephalopod genus belonging to the family Aspidoceratidae. These nektonic carnivores lived during the Jurassic period, Kimmeridgian In the geologic timescale, the Kimmeridgian is an age in the Late J ...'', '' Simaspidoceras'', and '' Intranodites''. Species '' Euaspidoceras ajax'' Leanza 1947 '' Euaspidoceras davouxi'' Bert and Bonnot 2004 '' Euaspidoceras babeanum'' 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. Mesozo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Perisphinctaceae Perisphinctoidea, formerly Perisphinctaceae, is a superfamily of Middle Jurassic (Bajocian) to Lower Cretaceous (Barremian) ammonites, commonly with evolute shells with strong ribbing that typically divides about mid flank before crossing the venter. Classification Some 16 families have been recognized in the Perisphinctoidea. The following is based on Donovan ''et al.'' 1981Donovan, Callomon and Howarth 1981 Classification of the Jurassic Ammonitina; Systematics Association. with modification from the Treatise on Invertebrate Paleontology, Part L (1957) Perisphinctidae: Middle and Upper Jurassic root stock, derived from the Stephanoceratidae (Middle Jurassic direct derivatives of the Perisphinctidae) Morphiceratidae * Tulitidae Reineckeiidae Pachyceratidae Aspidoceratidae (early Upper Jurassic (Oxfordian) derivatives of Perisphinctidae) Aulacostephanidae Ataxioceratidae (mid Upper Jurassic (Kimmeridgian) derivatives of the Ataxioceratidae) Dorsoplanitidae * V ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	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 Jurassic constitutes the middle period of the Mesozoic, 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, 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 Anoxic event, oceanic anoxia, ocean acidification, and elevated temperatures likely caused by the eruption of the Karoo-Ferrar, Karoo-Ferrar large igneous provinces. The end of the Jurassic, however, has no clear boundary with the Cretaceous and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]