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Gervillia Sjögreni
''Gervillia'' is an extinct genus of prehistoric bivalves belonging to the family Bakevelliidae. Fossil records This genus is known in the fossil record from the Carboniferous period to the Eocene The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes ... period (from about 313.8 to 37.2 million years ago). Fossils of species within this genus have been found in marine sediments all over the world. Species Species within this genus include: * † ''Gervillia alaeformis'' Sowerby 1819 * † ''Gervillia alatior'' Imlay 1940 * † ''Gervillia angulata'' Münster 1841 * † ''Gervillia angusta'' Munster 1838 * † ''Gervillia cholla'' Stoyanow 1949 * † ''Gervillia dissita'' White 1887 * † ''Gervillia galcazzi'' Stoppani 1863 * † ''Gervillia heinemani'' Stoyanow 1949 * † ''Gervillia in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous
The Carboniferous ( ) is a Geologic time scale, geologic period and System (stratigraphy), system of the Paleozoic era (geology), era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the Permian Period, Ma. It is the fifth and penultimate period of the Paleozoic era and the fifth period of the Phanerozoic eon (geology), eon. In North America, the Carboniferous is often treated as two separate geological periods, the earlier Mississippian (geology), Mississippian and the later Pennsylvanian (geology), Pennsylvanian. The name ''Carboniferous'' means "coal-bearing", from the Latin ("coal") and ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern "system" names, it was coined by geologists William Conybeare (geologist), William Conybeare and William Phillips (geologist), William Phillips in 1822, based on a study of the British rock succession. Carboniferous is the per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eocene
The Eocene ( ) is a geological epoch (geology), epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name ''Eocene'' comes from the Ancient Greek (''Ēṓs'', 'Eos, Dawn') and (''kainós'', "new") and refers to the "dawn" of modern ('new') fauna that appeared during the epoch.See: *Letter from William Whewell to Charles Lyell dated 31 January 1831 in: * From p. 55: "The period next antecedent we shall call Eocene, from ήως, aurora, and χαινος, recens, because the extremely small proportion of living species contained in these strata, indicates what may be considered the first commencement, or ''dawn'', of the existing state of the animate creation." The Eocene spans the time from the end of the Paleocene Epoch to the beginning of the Oligocene Epoch. The start of the Eocene is marked by a brief period in which the concentration of the carbon isoto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhaetian
The Rhaetian is the latest age (geology), age of the Triassic period (geology), Period (in geochronology) or the uppermost stage (stratigraphy), stage of the Triassic system (stratigraphy), System (in chronostratigraphy). It was preceded by the Norian and succeeded by the Hettangian (the lowermost stage or earliest age of the Jurassic). The base of the Rhaetian lacks a formal Global Boundary Stratotype Section and Point, GSSP, though candidate sections include Steinbergkogel section, Steinbergkogel in Austria (since 2007) and Pignola-Abriola section, Pignola-Abriola in Italy (since 2016). The end of the Rhaetian (and the base of the overlying Hettangian Stage) is more well-defined. According to the current International Commission on Stratigraphy, ICS (International Commission on Stratigraphy) system, the Rhaetian ended ± 0.2 Ma (million years ago). In 2010, the base of the Rhaetian (i.e. the Norian-Rhaetian boundary) was voted to be defined based on the first appearance of ''Mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jacques Louis Marin DeFrance
Jacques Louis Marin DeFrance (22 October 1758 – 12 November 1850) was a French malacologist. Works *Tableau Des Corps Organisés Fossiles: Précédé De Remarques Sur Leur Pétrification, Paris 1824gallica References * 1758 births 1850 deaths French malacologists {{France-scientist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalves
Bivalvia () or bivalves, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of aquatic molluscs (marine and freshwater) that have laterally compressed soft bodies enclosed by a calcified exoskeleton consisting of a hinged pair of half-shells known as valves. As a group, bivalves have no head and lack some typical molluscan organs such as the radula and the odontophore. Their gills have evolved into ctenidia, specialised organs for feeding and breathing. Common bivalves include clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. Majority of the class are benthic filter feeders that bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as scallops and file shells, can swim. Shipworms bore into wood, clay, or ston ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bakevelliidae
Bakevelliidae is an extinct family (biology), family of prehistoric bivalves that lived from the Late Mississippian age, Mississippian until the Middle Eocene.The Paleobiology Database Bakevelliidae entry Retrieved 2 January 2012. Bakevelliidae species are found worldwide, excluding Antarctica. Living a stationary life attached to substrate in marine and brackish environments, they formed shells of an aragonite composition with a low amount of magnesium calcite. The family was named by William King (geologist), William King in 1850. At least one genus in the family, ''Hoernesia'', has a notably twisted commissure join. Morphology Generally the family consists of species with elongate shells with notably unequal Valve (mollusc), valves. ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
