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Rudist
Rudists are a group of extinct box-, tube- or ring-shaped marine heterodont bivalves belonging to the order Hippuritida that arose during the Late Jurassic and became so diverse during the Cretaceous that they were major reef-building organisms in the Tethys Ocean, until their complete extinction at the close of the Cretaceous. Shell description The Late Jurassic forms were elongate, with both valves being similarly shaped, often pipe or stake-shaped, while the reef-building forms of the Cretaceous had one valve that became a flat lid, with the other valve becoming an inverted spike-like cone. The size of these conical forms ranged widely from just a few centimeters to well over a meter in length. Their "classic" morphology consisted of a lower, roughly conical valve that was attached to the seafloor or to neighboring rudists, and a smaller upper valve that served as a kind of lid for the organism. The small upper valve could take a variety of interesting forms, including: a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hippuritidae
Rudists are a group of extinct box-, tube- or ring-shaped marine heterodont bivalves belonging to the order Hippuritida that arose during the Late Jurassic and became so diverse during the Cretaceous that they were major reef-building organisms in the Tethys Ocean, until their complete extinction at the close of the Cretaceous. Shell description The Late Jurassic forms were elongate, with both valves being similarly shaped, often pipe or stake-shaped, while the reef-building forms of the Cretaceous had one valve that became a flat lid, with the other valve becoming an inverted spike-like cone. The size of these conical forms ranged widely from just a few centimeters to well over a meter in length. Their "classic" morphology consisted of a lower, roughly conical valve that was attached to the seafloor or to neighboring rudists, and a smaller upper valve that served as a kind of lid for the organism. The small upper valve could take a variety of interesting forms, including: a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 the entire Phanerozoic. The name is derived from the Latin ''creta'', "chalk", which is abundant in the latter half of the period. It is usually abbreviated K, for its German translation ''Kreide''. The Cretaceous was a period with a relatively warm climate, resulting in high eustatic sea levels that created numerous shallow inland seas. These oceans and seas were populated with now- extinct marine reptiles, ammonites, and rudists, while dinosaurs continued to dominate on land. The world was ice free, and forests extended to the poles. During this time, new groups of mammals and birds appeared. During the Early Cretaceous, flowering plants appeared and began to rapidly diversify, becoming the dominant group of plants across the Earth b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caprinidae
Caprinidae is a family of rudists, a group of unusual extinct saltwater clams, marine heterodont bivalves in the order Hippuritida. These stationary intermediate-level epifaunal suspension feeders lived in the Cretaceous period, from 140.2 to 66.043 Ma. The rudists became extinct at the end of the Cretaceous, apparently as a result of the Cretaceous–Paleogene extinction event The Cretaceous–Paleogene (K–Pg) extinction event (also known as the Cretaceous–Tertiary extinction) was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. With the .... Fossils of this genus have been found in the sediments of Europe, China, Cuba, Egypt, Guatemala, Jamaica, Japan, Mexico, Oman, the Philippines, Turkey, Russia, the United States and Venezuela. Genera * †'' Antillocaprina'' * †'' Caprina'' * †'' Caprinula'' * †'' Caprinuloidea'' * †'' Coalcomana'' * †'' Conchemipora'' * †'' Guzzyella'' * � ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radiolitidae
''Radiolitidae'' is a family of rudists in the order Hippuritida. Fossil record These rudists lived between the Jurassic and the Cretaceous (age range: 130.0 to 66.043 million years ago). Genera Genera within this family include: * † '' Agriopleura'' Kühn 1832 * † '' Apulites'' Tavani 1958 * † '' Archaeoradiolites'' Fenerci-Masse et al. 2006 * † '' Biradiolites'' d'Orbigny 1850 * † '' Bournonia'' Fischer 1887 * † '' Bystrickya'' Lupu 1976 * † '' Chiapasella'' Müllerried 1931 * † '' Colveraia'' Klinghardt 1921 * † '' Contraspira'' Mitchell 2009 * † '' Darendeella'' Karacabey-Oztemür 1976 * † '' Distefanella'' Parona 1901 * † '' Dubertretia'' Cox 1965 * † ''Durania'' Douvillé 1908 * † '' Eoradiolites'' Douvillé 1909 * † '' Favus'' Laviano and Skelton 1992 * † '' Fossulites'' Astre 1957 * † '' Fundinia'' Sladić-Trifunović and Pejović 1977 * † '' Glabrobournonia'' Morris and Skelton 1995 * † '' Gorjanovicia'' Polšak 1967 * † '' Hacobj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cretaceous–Paleogene Extinction Event
The Cretaceous–Paleogene (K–Pg) extinction event (also known as the Cretaceous–Tertiary extinction) was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. With the exception of some ectothermic species such as sea turtles and crocodilians, no tetrapods weighing more than survived. It marked the end of the Cretaceous Period, and with it the Mesozoic era, while heralding the beginning of the Cenozoic era, which continues to this day. In the geologic record, the K–Pg event is marked by a thin layer of sediment called the K–Pg boundary, which can be found throughout the world in marine and terrestrial rocks. The boundary clay shows unusually high levels of the metal iridium, which is more common in asteroids than in the Earth's crust. As originally proposed in 1980 by a team of scientists led by Luis Alvarez and his son Walter, it is now generally thought that the K–Pg extinction was cause ... [...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] |
Diceratidae
Diceratidae is a family of rudists Rudists are a group of extinct box-, tube- or ring-shaped marine heterodont bivalves belonging to the order Hippuritida that arose during the Late Jurassic and became so diverse during the Cretaceous that they were major reef-building organis ..., a group of unusual extinct saltwater clams, marine heterodont bivalves in the order Hippuritida. Genera Genera within the family Diceratidae: *†'' Diceras'' Lamarck, 1805 ReferencesPaleobiology Database Prehistoric bivalve families Jurassic first appearances [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Requieniidae
Requieniidae is a family of rudists, in the order Hippuritida, which lived from 155.7 to 66.043 million years ago. Taxonomy Placed by the WoRMS and Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals .... Family Requieniidae Kutassy, 1934 * Subfamily: Matheroniinae ** Genus: '' Hypelasma'' ** Genus: '' Kugleria'' ** Genus: '' Lovetchenia'' ** Genus: '' Matheronia'' ** Genus: '' Rutonia'' * Subfamily: Requieniinae ** Genus: '' Apricardia'' ** Genus: '' Bayleia'' ** Genus: '' Bayleoidea'' ** Genus: '' Pseudotoucasia'' ** Genus: '' Requienia'' ** Genus: '' Toucasia'' References Prehistoric bivalve families Hippuritida {{Paleo-bivalve-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalves
Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like the radula and the odontophore. They include the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves 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 the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances. The shell of a bivalve is composed of calc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterodonta
Heteroconchia is a taxonomic infraclass of saltwater clams, marine bivalve molluscs, belonging to the subclass Autobranchia This infraclass includes the edible clams, the cockles and the Venus clams. Description These bivalves are distinguished by having the two halves of the shell equally sized (i.e, they are ''equivalved'') and having a few cardinal teeth separated from a number of long lateral teeth. Their shells lack a nacreous layer, and the gills are lamellibranch in form. Most species have a siphon. Orders and families The following tree is their info which has been updated with the latest information from the World Register of Marine Species: Infraclass: Heteroconchia *Unclassified family: † Lipanellidae *Subterclass: Archiheterodonta **Order: † Actinodontida ***Superfamily: † Amnigenioidea ****Family: † Amnigeniidae ****Family: † Montanariidae ****Family: † Zadimerodiidae *** Superfamily: † Anodontopsoidea **** Family: † Actinodontidae **** Fami ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chamoidea
Chamidae, common name the jewel boxes or jewel box clams, is a taxonomic family of saltwater clams, a group of marine bivalve mollusks in the order Venerida.Abbott, R.T. & Morris, P.A. ''A Field Guide to Shells: Atlantic and Gulf Coasts and the West Indies.'' New York: Houghton Mifflin, 1995. 53. Genera and species Genera and species in the family Chamidae: *''Arcinella'' Schumacher, 1817 **''Arcinella arcinella'' (Linnaeus, 1767) – spiny jewelbox **''Arcinella cornuta'' Conrad, 1866 – Florida spiny jewelbox *'' Chama'' Linnaeus, 1758 **'' Chama arcana'' Bernard, 1976 – secret jewelbox **''Chama congregata'' Conrad, 1833 – corrugate jewelbox **''Chama echinata'' Broderip, 1835 **''Chama florida'' Lamarck, 1819 – pretty jewelbox **''Chama frondosa'' Broderip, 1835 **''Chama hicksi'' Valentich-Scott & Coan, 2010 **'' Chama lactuca'' Dall, 1886 – milky jewelbox **'' Chama macerophylla'' Gmelin, 1791 – leafy jewelbox **'' Chama pellucida'' Broderip, 1835 **''Chama sar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megalodontoidea
Megalodontoidea is a superfamily of fossil bivalves in the order Megalodontida. The following families are included in Megalodontoidea: *† Ceratomyopsidae *†Dicerocardiidae Dicerocardiidae is an extinct family of fossil saltwater clams, Marine (ocean), marine heterodont bivalve molluscs, in the order Megalodontida. Genera Genera within the family Dicerocardiidae: * †''Cornucardia'' Koken 1913 * †''Dicerocardium ... *† Megalodontidae *† Pachyrismatidae *† Wallowaconchidae References Bivalve superfamilies Bivalve taxonomy Prehistoric bivalves {{paleo-bivalve-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
