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Scaphitidae
Scaphitidae is a family of extinct cephalopods belonging to the family of heteromorph ammonites (suborder Ancyloceratina). There is a possible fossil record of them being the last ammonites with fossils dating to the Danian of the Paleocene in Denmark, The Netherlands, The US and Turkmenistan. Genera Scaphitidae Gill, 1871 *Subfamily Otoscaphitinae Wright, 1953 **''Yezoites'' Yabe, 1910 *Subfamily Scaphitinae Gill, 1871 **''Acanthoscaphites'' Nowak, 1911 **''Clioscaphites'' Cobban, 1951 **''Discoscaphites'' Meek, 1870 **''Eoscaphites'' Breistroffer, 1947 **''Hoploscaphites'' Nowak, 1911 **''Indoscaphites'' Spath, 1953 **''Jeletzkytes'' Riccardi, 1983 **''Ponteixites'' Warren, 1934 **''Rhaeboceras'' Meek, 1876 **''Scaphites'' Parkinson, 1811 **''Trachyscaphites'' Cobban & Scott, 1964 *Subfamily ''Incertae sedis'' **''Worthoceras'' Adkins, 1928 References Scaphitidae, Ammonitida families {{Ammonitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scaphitidae
Scaphitidae is a family of extinct cephalopods belonging to the family of heteromorph ammonites (suborder Ancyloceratina). There is a possible fossil record of them being the last ammonites with fossils dating to the Danian of the Paleocene in Denmark, The Netherlands, The US and Turkmenistan. Genera Scaphitidae Gill, 1871 *Subfamily Otoscaphitinae Wright, 1953 **''Yezoites'' Yabe, 1910 *Subfamily Scaphitinae Gill, 1871 **''Acanthoscaphites'' Nowak, 1911 **''Clioscaphites'' Cobban, 1951 **''Discoscaphites'' Meek, 1870 **''Eoscaphites'' Breistroffer, 1947 **''Hoploscaphites'' Nowak, 1911 **''Indoscaphites'' Spath, 1953 **''Jeletzkytes'' Riccardi, 1983 **''Ponteixites'' Warren, 1934 **''Rhaeboceras'' Meek, 1876 **''Scaphites'' Parkinson, 1811 **''Trachyscaphites'' Cobban & Scott, 1964 *Subfamily ''Incertae sedis'' **''Worthoceras'' Adkins, 1928 References Scaphitidae, Ammonitida families {{Ammonitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yezoites
''Yezoites'' is an extinct genus of ammonites placed in the family Scaphitidae. The genus is known lived during the Upper Cretaceous and was first described in 1910. The genus contains five species, ''Y. bladenensis'', ''Y. orbignyi'', ''Y. planus'', ''Y. puerculus'', and ''Y. subevolutus''. ''Yezoites'' was first discovered in the Upper Cretaceous Yezo Group, Hokkaido, Japan and has since been identified in Antarctica, Denmark, France, Madagascar, and the United States. The shell has wide spaced ribbing. References Ammonitida genera Scaphitidae Cretaceous animals of Africa Coniacian genus first appearances Santonian genus extinctions {{Ammonitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Danian
The Danian is the oldest age or lowest stage of the Paleocene Epoch or Series, of the Paleogene Period or System, and of the Cenozoic Era or Erathem. The beginning of the Danian (and the end of the preceding Maastrichtian) is at the Cretaceous–Paleogene extinction event . The age ended , being followed by the Selandian. Stratigraphic definitions The Danian was introduced in scientific literature by German- Swiss geologist Pierre Jean Édouard Desor in 1847 following a study of fossils found in France and Denmark.Danien He identified this stage in deposits from |
Hoploscaphites
''Hoploscaphites'' is an extinct ammonite genus from the Upper Cretaceous and the Lower Paleocene, included in the family Scaphitidae. Morphology It is considered by some to be a subgenus of ''Scaphites''. Like ''Scaphites'' the shell of ''Hoploscaphites'' is involute with the final whorl projecting forward and curved back on itself. Shells vary from compressed to inflated with convex sides. Tubercles normally present may be sparse or absent. Distribution Fossils of ''Hoploscaphites'' have been found in Antarctica, Austria, Belgium, Bulgaria, Canada (Alberta, Saskatchewan), Chile, Denmark, France, Germany, Greenland, India, the Netherlands, Turkmenistan, Ukraine and the United States (Arkansas, Colorado, Delaware, Kansas, New Jersey, New Mexico, North Dakota, South Dakota, Texas, Wyoming).''Hoploscaphite ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scaphites
''Scaphites'' is a genus of heteromorph ammonites belonging to the Scaphitidae family. They were a widespread genus that thrived during the Late Cretaceous period. Morphology ''Scaphites'' generally have a chambered, boat-shaped shell. The initial part (juvenile stage) of the shell is generally more or less involute (tightly coiled) and compressed, giving no hint of the heteromorphic shell form yet to come. The terminal part (adult stage) is much shorter, erect, and bends over the older shell like a hook. They have transverse, branching ribs with tubercles (small bumps) along the venter. Reconstructions of the body within the shell can be made to portray ''Scaphites'' as either a benthic (bottom-dwelling) or planktonic animal, depending on where the center of gravity is located. Since useful fossils of the soft-body parts of cephalopods are highly rare, little is known about how this animal actually fit into its shell and lived its life. Age Because ''Scaphites'' and its relat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeletzkytes
''Jeletzkytes'' is an extinct genus of scaphatoid ammonite from the Upper Cretaceous (Maastrichtian) of North America named and described by Riccardi, 1983. In overall form ''Jeletzkytes'' closely resembles the genus ''Scaphites ''Scaphites'' is a genus of heteromorph ammonites belonging to the Scaphitidae family. They were a widespread genus that thrived during the Late Cretaceous period. Morphology ''Scaphites'' generally have a chambered, boat-shaped shell. The ini ...''. A number of species have been described in the genus including: *''J. brevis'' *''J. compressus'' *''J. crassus'' *''J. criptonodosus'' *''J. dorfi'' *''J. furnivali'' *''J. nebrascensis'' *''J. nodosus'' *''J. spedeni'' References Jeletzkytes Paleobiology Database. 13 Mar. 2013. * Neil H. Landman, Karl M Waage (Karl Mensch); Scaphitid ammonites of the Upper Cretaceous (Maastrichtian) Fox Hills Formation in South Dakota and Wyoming. Bulletin of the AMNH ; no. 215, 1993 Ammonitida genera Scaphiti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clioscaphites
''Clioscaphites'' is an extinct genus of ammonite belonging to the family Scaphitidae. Species in this genus are important index fossils of the Western Interior Seaway of the Coniacian to Santonian Ages of the Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of .... References Mesozoic animals Scaphitidae Late Cretaceous ammonites of North America {{Ammonite-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhaeboceras
''Rhaeboceras'' is an extinct genus of ammonite belonging to the subfamily Scaphitinae. Species belonging to the genus lived during the Cretaceous and have been found in the Pierre Shale The Pierre Shale is a geologic formation or series in the Upper Cretaceous which occurs east of the Rocky Mountains in the Great Plains, from Pembina Valley in Canada to New Mexico. The Pierre Shale was described by Meek and Hayden in 1862 in th ... of North America. Taxonomy The genus ''Ponteixites'' is currently deemed a junior synonym of ''Rhaeboceras'', with most specimens formerly assigned to ''Ponteixites'' appearing to be juveniles. The finding of a larger fossil specimen assigned to ''P. robustus'' similar to these juvenile remains provides evidence supporting this lumping. References Cretaceous ammonites Scaphitidae {{Ammonite-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Discoscaphites
''Discoscaphites '' is an extinct genus of ammonite. This genus may have been one of the few to have briefly survived the K-Pg mass extinction. Distributions Cretaceous of Greenland, Alabama, Arkansas, California, Colorado, Kansas, Maryland, Mississippi, Missouri, New Jersey, South Dakota, Tennessee, Texas, Wyoming, and North Carolina. ''Discoscaphites'' is present in the famous Pinna Layer of the Tinton Formation of New Jersey (above the iridium anomaly The term iridium anomaly commonly refers to an unusual abundance of the chemical element iridium in a layer of rock strata at the Cretaceous–Paleogene (K–Pg) boundary. The unusually high concentration of a rare metal like iridium is often tak ...), with even possible records in the layer above, along with ''Eubaculites''. some researchers prefer a conservative interpretation when dating the Pinna Layer, the other remains still suggest ''Discoscaphites'' was a K-Pg survivor, albeit restricted to 65 Ma. References Exter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthoscaphites
''Acanthoscaphites'' is an extinct genus of cephalopod belonging to the Ammonite subclass. The average diameter of its shell was approximately , but some specimens have been found with a diameter of slightly over . Classification ''Acanthoscaphites'' was first described by Schluter in 1872. Subsequent taxonomic revisions indicate that the relationship between ''Acanthoscaphites'' and ''Trachyscaphites'' is still unclear: ''Acanthoscaphites'' may have evolved in parallel with or as a derivative of ''Trachyscaphites''. Species *''A. plenus'' *''A. tridens'' *''A. verneuilianus'' Biogeography ''Acanthoscaphites'' was a widespread genus during Campanian and Maastrichtian times, approximately 80 million years ago. Its remains can be found in rocks of that age from Europe and North America. References Late Cretaceous ammonites of Europe Late Cretaceous ammonites of North America Ammonitida genera Scaphitidae Campanian genus first appearances Maastrichtian genus extinctions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ancyloceratina
The Ancyloceratina were a diverse suborder of ammonite most closely related to the ammonites of order Lytoceratina. They evolved during the Late Jurassic but were not very common until the Cretaceous period, when they rapidly diversified and became one of the most distinctive components of Cretaceous marine faunas. They have been recorded from every continent and many are used as zonal or index fossils. The most distinctive feature of the majority of the Ancyloceratina is the tendency for most of them to have shells that are not regular spirals like most other ammonites. These irregularly-coiled ammonites are called heteromorph ammonites, in contrast to regularly coiled ammonites, which are called homomorph ammonites. Biology The biology of the heteromorph ammonites is not clear, but one certainty is that their uncoiled shells would have made these forms very poor swimmers. Open shells, particularly ones with spines and ribs, create a lot of drag; but more importantly, the orie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turkmenistan
Turkmenistan ( or ; tk, Türkmenistan / Түркменистан, ) is a country located in Central Asia, bordered by Kazakhstan to the northwest, Uzbekistan to the north, east and northeast, Afghanistan to the southeast, Iran to the south and southwest and the Caspian Sea to the west. Ashgabat is the capital and largest city. The population is about 6 million, the lowest of the Central Asian republics, and Turkmenistan is one of the most sparsely populated nations in Asia. Turkmenistan has long served as a thoroughfare for other nations and cultures. Merv is one of the oldest oasis-cities in Central Asia, and was once the biggest city in the world. It was also one of the great cities of the Islamic world and an important stop on the Silk Road. Annexed by the Russian Empire in 1881, Turkmenistan figured prominently in the anti-Bolshevik movement in Central Asia. In 1925, Turkmenistan became a constituent republic of the Soviet Union, the Turkmen Soviet Socialist Repu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
