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Gymnitidae
Gymnitidae is a family of Lower to Middle Triassic ammonite cephalopods with evolute, discoidal shells. Hyatt and Smith (1905, p. 114-115) included the Gymnitidae in the suborder Ceratitoidea, which later became the superfamily Ceratitaceae and included in it genera more primitive than ''Gymnites'' as well as the more advanced ''Gymnites''. Those being '' Xenaspis'', '' Flemingites'', and ''Ophiceras''. Derivation as shown in Smith (1932 p. 30) is from ''Xenodiscus''. The more primitive ''Xenaspis'', ''Flemingites'', and ''Ophiceras'', found in Lower Triassic beds in western America have ceratitic sutures. The more developed ''Gymnites'' has deeply digitate ammonitic sutures. Arkell, et al., 1957, in the Treatise on Invertebrate Paleontology, on the other hand included the Gymnitidae in the Pinacocerataceae as the earlier and more primitive of its two families, combining ''Gymnites'' with coeval and more advanced forms. Genera included in the Gymnitidae sensu Arkell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnitidae
Gymnitidae is a family of Lower to Middle Triassic ammonite cephalopods with evolute, discoidal shells. Hyatt and Smith (1905, p. 114-115) included the Gymnitidae in the suborder Ceratitoidea, which later became the superfamily Ceratitaceae and included in it genera more primitive than ''Gymnites'' as well as the more advanced ''Gymnites''. Those being '' Xenaspis'', '' Flemingites'', and ''Ophiceras''. Derivation as shown in Smith (1932 p. 30) is from ''Xenodiscus''. The more primitive ''Xenaspis'', ''Flemingites'', and ''Ophiceras'', found in Lower Triassic beds in western America have ceratitic sutures. The more developed ''Gymnites'' has deeply digitate ammonitic sutures. Arkell, et al., 1957, in the Treatise on Invertebrate Paleontology, on the other hand included the Gymnitidae in the Pinacocerataceae as the earlier and more primitive of its two families, combining ''Gymnites'' with coeval and more advanced forms. Genera included in the Gymnitidae sensu Arkell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnites
''Gymnites'' is a genus of ammonoid cephalopod from the Middle Triassic belonging to the ceratitid family Gymnitidae. These nektonic carnivores lived during the Triassic period, Anisian age.Sepkoski, JacSepkoski's Online Genus Database – Cephalopoda/ref> Species * ''Gymnites aghdarbandensis'' Krystyn and Tatzreiter 1991 * ''Gymnites asseretoi'' Tozer 1972 * ''Gymnites billingsi'' Bucher 1989 * ''Gymnites calli'' Smith 1914 * ''Gymnites compressus'' Tozer 1994 * ''Gymnites evolutus'' Shevyrev 1995 * ''Gymnites humboldti Mojsisovics 1882 * ''Gymnites incultus'' Beyrich 1867 * ''Gymnites machangpingensis'' Zhao and Wang 1974 * ''Gymnites perplanus'' Meek 1877 * ''Gymnites petilus'' Wang and Chen 1979 * ''Gymnites procerus'' Tozer 1994 * ''Gymnites robinsoni'' Shevyrev 1995 * ''Gymnites toulai'' Arthaber 1914 * ''Gymnites tozeri'' Bucher 1992 * ''Gymnites tregorum'' Silberling and Nichols 1982 * ''Gymnites vastesellatus'' Welter 1915 Description The shell of ''Gymnites'' is evolut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pinacocerataceae
Pinacoceratoidea, formerly Pinacocerataceae, are generally smooth, compressed, evolute to involute ammonoids from the Triassic, belonging to the Ceratitida, in which the suture is ammonitic, with adventitious and auxiliary elements. As presently conceived, the Pinacoceratoidea, named by Mojsisovics, 1879, combines six families; the: * Pinacoceratidae * Carnitidae *Gymnitidae * Isculitidae * Klamathitidae * Sagenitidae In ''Treatise on Invertebrate Paleontology'', Part L, the superfamily included only the Pinacoceratidae and Gymnitidae. Of the families more newly included in the Pinacocerataceae, the Carnitidae was removed from the Ceratitaceae and the Isculitidae from the Ptychitaceae. ''Klamathites'' was removed from the Carnitidae as type for the Klamathitidae. The Sagenitidae is based on the subfamily Sagenitinae of the tropitacean family Haloritidae The Haloritidae is a family of subglobular, involute, Triassic ammonoids belonging to the ceratitid superfamily Tropitoidea. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xiphogymnites
''Xiphogymnites'' is an extinct ammonoid cephalopod genus from the Triassic included in the family Gymnitidae. It is known from the Balkans in eastern Europe. The shell is similar to that of ''Gymnites'', smooth, evolute, whorl section oval, venter arched, suture ammonitic, except that it has a row of tubercles on the venter followed by constrictions. Both genera are included in the Pinacoceratoidea Pinacoceratoidea, formerly Pinacocerataceae, are generally smooth, compressed, evolute to involute ammonoids from the Triassic, belonging to the Ceratitida, in which the suture is ammonitic, with adventitious and auxiliary elements. As presently .... References * Arkell, et al., Mesozoic Ammonoidea, ''Treatise on Invertebrate Paleontology'' Part L (1957) Geological Society of America. * E. T. Tozer. 1981. Triassic Ammonoidea: Classification, evolution and relationship with Permian and Jurassic Forms. The Ammonoidea: The evolution classification, mode of life and geological useful ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galerie De Paléontologie Et D'anatomie Comparée
The Gallery of Paleontology and Comparative Anatomy (in French, ''galerie de Paléontologie et d'Anatomie comparée'') is a part of the French National Museum of Natural History (''Muséum national d'histoire naturelle'', MNHN). It is situated in the '' Jardin des plantes'' in Paris near the Gare d'Austerlitz. The Gallery of Comparative Anatomy (occupying the ground floor), holds nearly a thousand skeletons and interprets their organization and classification. The Gallery of Paleontology (occupying the first and second floor) presents a famous collection of fossil vertebrates, fossil invertebrates and fossil plants. Among the most appreciated pieces by the public is worth mentioning a series of dinosaur skeleton casts (''Diplodocus'', ''Iguanodon'', ''Allosaurus'', ''Carnotaurus'', ''Tarbosaurus'', ''Unenlagia'', ''Dromaeosaurus'', '' Bambiraptor'') but also a ''Tyrannosaurus'' skull (cast of specimen AMNH 5027), an authentic skull of ''Triceratops'', an authentic ''Compsognathu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceratitida Families
Ceratitida is an order that contains almost all ammonoid cephalopod genera from the Triassic as well as ancestral forms from the Upper Permian, the exception being the phylloceratids which gave rise to the great diversity of post Triassic ammonites. Ceratitids overwhelmingly produced planospirally coiled discoidal shells that may be evolute with inner whorls exposed or involute with only the outer whorl showing. In a few later forms the shell became subglobular, in others, trochoidal or uncoiled. Sutures are typically ceratitic, with smooth saddles and serrate or digitized lobes. In a few the sutures are goniatitic while in others they are ammonitic. Taxonomy * Ceratitida **Ceratitoidea **Choristoceratoidea **Clydonitoidea **Danubitoidea **Dinaritoidea ** Lobitoidea ** Meekoceratoidea ** Megaphyllitoidea ** Nathorstitoidea **Noritoidea **Otoceratoidea **Pinacoceratoidea **Ptychitoidea ** Sageceratoidea **Tropitoidea **Xenodiscoidea Only eight superfamilies are shown i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
James Perrin Smith
James Perrin Smith (November 27, 1864 – January 1, 1931) was an American geologist and paleontologist. Smith was of English descent. T. M. Forster, one of his ancestors, was a surgeon in the Royal Navy and moved to Virginia in 1745. His paternal grandfather moved the family from Virginia to South Carolina, and Smith was born on November 27, 1864, near Cokesburg, to James Francis Smith, a planter and traveling preacher. James P. Smith was educated by his parents and elder brother Charles Forster Smith. In the 1870s, the family moved to Spartanburg, South Carolina, where James obtained a bachelor's degree at Wofford College in 1884. Smith then attended Vanderbilt University until 1887, for a master's degree. He subsequently taught high school science and mathematics in Nashville, Tennessee for two years. Smith then worked for the Arkansas Geological Survey under John Casper Branner. Between 1890 and 1892, Smith studied at the University of Göttingen. His doctoral work was supervise ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Xenodiscus
''Xenodiscus'' is an extinct ammonoid cephalopod genus and one of the earliest ceratites, found in the Upper Permian The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleoz ... of northern India and Timor. ''Xenodiscus'' is included in the family Xenodiscidae which is part of the ceratite superfamily Xenodiscaceae ''Xenodiscus'' has a thinly discoidal and ribbed shell with ceratitic sutures, coiled so all whorls are exposed. The whorl section is subquadrate and compressed, so as to be narrower than high. References * Arkell et al., 1957; Suborder Ceratitina in the Treatise on Invertebrate Paleontology Part L Ammonoidea; Geological Soc. of America and Univ Kansas press. Ceratitida genera Xenodiscidae Ammonites of Asia Permian ammonites {{Ceratitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilhelm Heinrich Waagen
Wilhelm Heinrich Waagen (23 June 184124 March 1900) was a German geologist and paleontologist. He was born in Munich and died in Vienna. Overview He received a Doctor of Philosophy degree at the University of Munich, where he studied the rocks and fossils of the Jurassic system, and published an elaborate work on geology (''Versuch einer Allgemeinen Classification der Schichten des oberen Jura'') that was crowned by the university. In 1866 he became an instructor in palaeontology at the University of Munich and at the same time taught Princess Theresa and Prince Arnulf of Bavaria. Although an excellent teacher, and especially competent in practical work, Waagen, who was a most loyal Catholic, had little prospect of obtaining a professorship at the University of Munich. Consequently, in 1870, he accepted the offer of a position as assistant in the geological survey of India, and was appointed palaeontologist in 1874. In 1875, he returned permanently to Europe because of the severit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ophiceras
''Ophiceras'' is a genus of smooth, evolute Ceratitida, ceratitid Ammonoidea, ammonites from the Early Triassic, with a rounded venter. Fossils of the genus have been found in Armenia, Azerbaijan, China, Greenland, and India.''Ophiceras'' at Fossilworks.org Diagnosis The shell of ''Ophiceras'' evolute, whorls all showing, slowly increasing in height, and slightly embracing the previous. Umbilicus, wide and moderately deep. Surface ornamented with faint folds, which in some develop into coarse ribs in the mature growth stage, and transverse striae. Suture is ceratitic, lobes and saddles usually long and narrow. (Smith, 1932. Arkell, 1957)Taxonomy ''Ophiceras'' is included in the Ophiceratidae according to the Treatise on Invertebrate Paleontology (Arkell, 1957), but was ea ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
