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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 ** '' Simoceras'' ** '' Virgatosimoceras'' References * Arkell, et al., Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the Univ ... [...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 In the geological timescale, the Berriasian is an age/ stage of the Early/Lower Cretaceous. It is the oldest subdivision in the entire Cretaceous. It has been taken to sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epaspidoceras
''Epaspidoceras'' is an extinct ammonoid cephalopod genus belonging to the order Ammonitida, family Aspidoceratidae. These cephalopods were fast-moving nektonic carnivores. They lived during the Jurassic (Kimmeridgian In the geologic timescale, the Kimmeridgian is an age in the Late Jurassic Epoch and a stage in the Upper Jurassic Series. It spans the time between 154.8 ±0.8 Ma and 149.2 ±0.7 Ma (million years ago). The Kimmeridgian follows the Oxfordian ...). References ;Notes ;Web Links Organism names* C. SartIl kimmeridgiano delle prealpi veneto-trentine: fauna e biostratigrafia Jurassic ammonites Kimmeridgian life Ammonitida genera Aspidoceratidae {{Ammonitina-stub ... [...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 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.Paleobiology Database – Orthaspidoceras 2014-05-29. References * Arkell, et al.,1957. Mesozoic Ammonoidea; |
Peltoceratinae
The Peltoceratinae comprise a subfamily in the Aspidoceratidae, (middle and upper Jurassic perisphinctacean ammonites). Genera in the Peltoceratinae have sharply ribbed inner whorls and outer whorls that bear spines or tubercles, or have coarse simple ribs. Among these are giant forms with simple peristomes (aperture openings) that occur along with smaller forms with lappets. Derivation of the Peltoceratinae seems most likely to be from the Pseudoperisphinctinae. References *Arkell et al., 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ..., Part L (Ammonoidea). Geol Soc of America and Univ Kansas Press. Jurassic ammonites Aspidoceratidae {{Ammonitina-stub ... [...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 References ;Notes ;Bibliography * Arkell, et al., 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Simoceratinae
The Simoceratinae is a subfamily in the Aspidoceratidae, a family of ammonites in the Perisphinctaceae, that lived during most of the Late Jurassic, especially in the Pacific and Tethyan realms. Early genera more closely resemble Perisphictidae and have constricted apertures. Later, more aberrant forms are unconstricted and develop grooved or concave venters. References * Arkell, et al., 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ..., Part L. (Ammonoidea). Geol Soc of America and Univ Kansas Press. Jurassic ammonites Aspidoceratidae {{Ammonitina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peltoceras
''Peltoceras'' is an extinct ammonite genus from the aspidoceratid subfamily Peltoceratinae that lived during the later part of the Middle Jurassic (U Callovian In the geologic timescale, the Callovian is an age and stage in the Middle Jurassic, lasting between 165.3 ± 1.1 Ma (million years ago) and 161.5 ± 1.0 Ma. It is the last stage of the Middle Jurassic, following the Bathonian and preceding the ...). The shell of ''Peltoceras'' is evolute with whorls hardly embracing, so that all whorls are mostly exposed. The outer rim, which is known as the venter, aligning with the lower part or belly of the animal, is nearly flat. Inner whorls have strong ribs that bifurcate and trifurcate on the ventral margin. The outer whorls have large simple ribs and two rows of massive lateral tubercles, the outer row developing first. References * Arkell, et al., 1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L. (Ammonoidea) p. L335-336. Geol Soc of America a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Euaspidoceras
''Euaspidoceras'' is an extinct ammonoid cephalopod genus that lived during the Middle Jurassic. The ancestor of ''Euaspidoceras'' is probably ''Aspidoceras'', and it is considered to be related to genera such as ''Orthaspidoceras ''Orthaspidoceras'' is an extinct ammonoid cephalopod genus belonging to the family Aspidoceratidae. These nektonic carnivores lived during the Jurassic period, Kimmeridgian age.Sepkoski, JacSepkoski's Online Genus Database – Cephalopoda De ...'', '' Simaspidoceras'', and '' Intranodites''. Species *'' Euaspidoceras ajax'' Leanza 1947 *'' Euaspidoceras akantheen'' (or '' Aspidoceras akantheen'') Buckman 1928 *'' 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, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rursiceras
''Rursiceras'' is a 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 143.1 Mya. ... ammonite belonging to the ammonitid. Distribution France and Switzerland References ;Notes Jurassic ammonites Ammonitida genera Aspidoceratidae {{Ammonitina-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Perisphinctoidea
Perisphinctoidea, formerly Perisphinctaceae, is a superfamily of Middle Jurassic (Bajocian) to Lower Cretaceous (Barremian) Ammonitina, 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, 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) derivativ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Treatise On Invertebrate Paleontology
The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authored work of currently 55 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and extant (still living) invertebrate animals. The prehistoric invertebrates are described as to their taxonomy, morphology, paleoecology, stratigraphic and paleogeographic range. However, taxa with no fossil record whatsoever have just a very brief listing. Publication of the decades-long ''Treatise on Invertebrate Paleontology'' is a work-in-progress; and therefore it is not yet complete: For example, there is no volume yet published regarding the post- Paleozoic era caenogastropods (a molluscan group including the whelk and periwinkle). Furthermore, when needed, previously published vol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |