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Stenopterygiidae
Stenopterygiidae are a family of the Ichthyosauria Ichthyosaurs (Ancient Greek for "fish lizard" – and ) are large extinct marine reptiles. Ichthyosaurs belong to the order known as Ichthyosauria or Ichthyopterygia ('fish flippers' – a designation introduced by Sir Richard Owen in 1842, altho ..., a group of extinct marine reptiles that superficially resemble fish. They are distinguished from other ichthyosaurs by the arrangement of the flipper bones and by the broad attachment of the fins to the body. References Further reading * Long, J.A., Dinosaurs of Australia & New Zealand, UNSW Press, Australia 1998 {{Taxonbar, from=Q994237 Jurassic ichthyosaurs ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stenopterygius
''Stenopterygius'' is an extinct genus of thunnosaur ichthyosaur known from Europe (England, France, Germany, Luxembourg and Switzerland). This genus of ichthyosaur was about long and weighed .Huene F. von 1939. Ein ganzes Ichthyosaurier-Skelett aus den westschweizerischen Voralpen. ''Mitteilungen der Naturforschenden Gesellschaft in Bern'' 1939, pp.: 1-14McGowan C, Motani R. 2003. Ichthyopterygia. – In: Sues, H.-D. (ed.): ''Handbook of Paleoherpetology, Part 8, Verlag Dr. Friedrich Pfeil'', 175 pp., 101 figs., 19 plts; München History ''Stenopterygius'' was originally named by Quenstedt in 1856 as a species of ''Ichthyosaurus'', ''I. quadriscissus''. Otto Jaekel in 1904 reassigned it to its own genus, ''Stenopterygius''. The type species is therefore ''Stenopterygius quadriscissus''. The generic name is derived from ''stenos'', Greek for "narrow", and ''pteryx'' (πτερυξ), Greek for "fin" or "wing". Description ''Stenopterygius'' was physically similar to the bette ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chacaicosaurus
''Chacaicosaurus'' is a genus of neoichthyosaurian ichthyosaur known from the Middle Jurassic of Argentina. The single known specimen of this genus was excavated from the Los Molles Formation in Neuquén Province, and is housed at the Museo Olsacher under the specimen number MOZ 5803. This specimen consists of a skull, forelimb, some vertebrae, and some additional postcranial elements. The genus was named by Marta Fernández in 1994, and contains a single species, ''Chacaicosaurus cayi'', making it the first named distinctive ichthyosaur from the Bajocian stage. It is a medium-sized ichthyosaur with a very long snout, which bears a ridge running along each side. The forelimbs of ''Chacaicosaurus'' are small and contain four main digits. Different authors have classified ''Chacaicosaurus'' in different ways; some consider it a thunnosaur closely related to the ophthalmosaurids, others instead place it outside of Thunnosauria, often near ''Hauffiopteryx''. However, as it is very ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnipterygius
''Magnipterygius'' is an extinct genus of primitive ichthyosaur found in the Early Jurassic (Lower Toarcian) Posidonia Shale of Dotternhausen, Germany. The holotype specimen is SMNS96922, a nearly complete articulated skeleton. This genus is well known as a small-sized Ichthyosaur, of around 120 cm length, making it the second genus of that size after the Triassic. Due to the similarities with the genus ''Stenopterygius'' it has been classified as a member of the family Stenopterygiidae. Discovery and naming The holotype specimen was uncovered in 2011 in the quarry of Holcim, Dotternhausen, with the consent of the State Museum of Natural History Stuttgart. It was recovered all except the tail, left in a block in situ. The preparation was done with air abrasive, using chemically clean iron power at low pressure. During the examination the specimen was found to represent a completely new genus of Ichthyosaur, and was named ''Magnipterygius huenei'', with the genus name being a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ichthyosauria
Ichthyosaurs (Ancient Greek for "fish lizard" – and ) are large extinct marine reptiles. Ichthyosaurs belong to the order known as Ichthyosauria or Ichthyopterygia ('fish flippers' – a designation introduced by Sir Richard Owen in 1842, although the term is now used more for the parent clade of the Ichthyosauria). Ichthyosaurs thrived during much of the Mesozoic era; based on fossil evidence, they first appeared around 250 million years ago ( Ma) and at least one species survived until about 90 million years ago, into the Late Cretaceous. During the Early Triassic epoch, ichthyosaurs and other ichthyosauromorphs evolved from a group of unidentified land reptiles that returned to the sea, in a development similar to how the mammalian land-dwelling ancestors of modern-day dolphins and whales returned to the sea millions of years later, which they gradually came to resemble in a case of convergent evolution. Ichthyosaurs were particularly abundant in the Late Triassic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Jurassic
The Early Jurassic Epoch (in chronostratigraphy corresponding to the Lower Jurassic Series) is the earliest of three epochs of the Jurassic Period. The Early Jurassic starts immediately after the Triassic-Jurassic extinction event, 201.3 Ma (million years ago), and ends at the start of the Middle Jurassic 174.1 Ma. Certain rocks of marine origin of this age in Europe are called "Lias" and that name was used for the period, as well, in 19th-century geology. In southern Germany rocks of this age are called Black Jurassic. Origin of the name Lias There are two possible origins for the name Lias: the first reason is it was taken by a geologist from an English quarryman's dialect pronunciation of the word "layers"; secondly, sloops from north Cornish ports such as Bude would sail across the Bristol Channel to the Vale of Glamorgan to load up with rock from coastal limestone quarries (lias limestone from South Wales was used throughout North Devon/North Cornwall as it conta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
