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Canjuers Lagerstätte
The Canjuers Lagerstätte is a Konservat-Lagerstätte located inside the military camp of Canjuers, in Provence, Haute Provence, in the Var (department), Var department (France), department in South-East France. Geology and stratigraphy From a Stratigraphy, stratigraphic point of view, this fossil deposit is located inside the Calcaires blancs de Provence geological formation, a 200-meter-thick limestone assemblage. The lithographic limestone of Canjuers, which bears almost all significant fossils from the Lagerstätte, is a thin layer (around 6 meters) at the basis of the Biomicrites de Sainte-Croix member, the later member of the Calcaires blancs de Provence. This layer has been dated by ammonite analysis to the Tithonian, Lower Tithonian (Neochetoceras, Neochetoceras mucronatum biozone), around 150 Mya. The Canjuers site facies outcrop in the Petit Plan de Canjuers plateau, and a quarry was exploited in the locality "Les Bessons". They correspond to deposits inside a sub-ci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compsognathus
''Compsognathus'' (; Ancient Greek, Greek ''kompsos''/κομψός; "elegant", "refined" or "dainty", and ''gnathos''/γνάθος; "jaw") is a genus of small, bipedalism, bipedal, carnivore, carnivorous theropoda, theropod dinosaur. Members of its single species ''Compsognathus longipes'' could grow to around the size of a chicken (bird), chicken. They lived about 150 mya (unit), million years ago, during the Tithonian Stage (stratigraphy), age of the late Jurassic Period (geology), period, in what is now Europe. Paleontologists have found two well-preserved fossils, one in Germany in the 1850s and the second in France more than a century later. Today, ''C. longipes'' is the only recognized species, although the French specimen was once thought to belong to a separate species named ''C. corallestris''. Many presentations still describe ''Compsognathus'' as "chicken-sized" dinosaurs because of the size of the German specimen, which is now believed to be a juvenile. ''Comps ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lagerstätte
A Fossil-Lagerstätte (, from ''Lager'' 'storage, lair' '' Stätte'' 'place'; plural ''Lagerstätten'') is a sedimentary deposit that preserves an exceptionally high amount of palaeontological information. ''Konzentrat-Lagerstätten'' preserve a high concentration of fossils, while ''Konservat-Lagerstätten'' offer exceptional fossil preservation, sometimes including preserved soft tissues. ''Konservat-Lagerstätten'' may have resulted from carcass burial in an anoxic environment with minimal bacteria, thus delaying the decomposition of both gross and fine biological features until long after a durable impression was created in the surrounding matrix. ''Fossil-Lagerstätten'' spans geological time from the Neoproterozoic era to the present. Worldwide, some of the best examples of near-perfect fossilization are the Cambrian Maotianshan shales and Burgess Shale, the Ordovician Soom Shale, the Silurian Waukesha Biota, the Devonian Hunsrück Slates and Gogo Formation, the Ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caturidae
Caturidae is an extinct Family (biology), family of predatory Amiiformes, amiiform Actinopterygii, ray-finned fish, being the sister-group to the extant family Amiidae. Though their body form is very different than the modern bowfin, a number of features in the skull point towards a close relationship between the groups. Members of the family were generally larger fish that lived within more coastal marine environments along with freshwater environments near the coast. In these environments, caturids would have fed on a variety of prey items, hunting them similarly to fish like Gar, gars and Barracuda, barracudas. The earliest members of the family appeared in the early Late Triassic, reaching an apex of diversity during the Jurassic with the youngest records of the group date to the Early Cretaceous. History Caturidae was erected by Owen in 1860 though members of the family have been known since the early 19th century, with genera like ''Caturus'' being described before the fami ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amiiformes
The Amiiformes order (biology), order of fish has only two extant taxa, extant species, the bowfins: ''Amia calva'' and ''Amia ocellicauda'', the latter recognized as a separate species in 2022. These Amiiformes are found in the freshwater systems of North America, in the United States and parts of southern Canada. They live in freshwater streams, rivers, and swamps. The order first appeared in the Triassic, and the extinct members include both marine and freshwater species, many of which are morphologically disparate from bowfins, such as the Caturidae, caturids. Evolution and diversity The extinct species of the Amiiformes can be found as fossils in Asia and Europe, but the bowfin is the last living species in the order. Amiiformes is therefore the last surviving order (biology), order of Halecomorphi, the clade to which the bowfin and its fossil relatives belong. Other orders, such as the Parasemionotiformes, are all extinct. Halecomorphs, and its sister group Ginglymodi, be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caturus
''Caturus'' (from , 'down' and 'tail') is an extinct genus of predatory marine fishes in the family Caturidae in the order Amiiformes, related to modern bowfin. It has been suggested that the genus is non-monophyletic with respect to other caturid genera. Fossils of this genus range from 200 to 140 mya (Early Jurassic to Early Cretaceous). Taxonomy ''Caturus'' has a confused taxonomic history. The genus was originally described by Louis Agassiz for two fossil fish (''U. pachyurus'' and ''U. gracilis'') that had been previously described in the genus ''Uraeus'', which was found to already be preoccupied by a genus of cobra of the same name (now classified as a subgenus within ''Naja''). However, neither of these species were properly described with an associated illustration or proper description, and they remain ''nomen dubia''; the specimen of ''U. pachyurus'' is lost, and the specimen of ''Caturus gracilis'' is too poorly-preserved to assign a specific taxon. Later, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
