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Gryphaeidae
The Gryphaeidae, common name the foam oysters or honeycomb oysters, are a family of marine bivalve mollusks. This family of bivalves is very well represented in the fossil record, however the number of living species is very few. All species have shells cemented to a substrate. Shells are considered brittle, inequivalve, with the left, lower (cemented) valve convex and the right (upper, non-cemented) valve flat or slightly concave. Subfamilies Genera and species within this family are divided into three subfamilies, Exogyrinae, Gryphaeinae and Pycnodonteinae. Both Exogyrinae and Gryphaeinae are completely extinct. Only two genera '' Hyotissa'' and ''Neopycnodonte'' in the subfamily Pycnodonteinae have extant species. Genera and species Genera and species within the family Gryphaeidae include: Family Gryphaeidae Vialov, 1936 (some genera also known as Devil's toenails) *Subfamily †Exogyrinae Vialov, 1936 **Genus †'' Aetostreon'' Bayle, 1878 **Genus †'' Amphidonte'' Fis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neopycnodonte
''Neopycnodonte'' is a genus of marine (ocean), marine bivalve molluscs belonging to the Family (biology), family Gryphaeidae. This genus is very well represented in the fossil record, however the number of living species is very few. Fossil specimens of ''Neopycnodonte'' species possibly dating as old as about 60 million years (Paleocene). Extant species have been recorded as fossils from the Miocene to the Quaternary (from 20.43 to 0.012 Ma). Description This genus includes deep-sea giant oysters with shells measuring up to 30 cm. The shells are usually brittle, inequivalve, with a left convex valve cemented to a substrate, while the right non-cemented one is flat or slightly concave. These bivalves can live for several centuries. Distribution and habitat While about 25 million years these mollusks formed large colonies near the coast, for unknown reasons they migrated to deeper waters. They usually live in the Mediterranean canyons or along the continental margins at d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gryphaea
''Gryphaea'', one of the genera known as devil's toenails, is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae. These fossils range from the Triassic period to the middle Paleogene period, but are mostly restricted to the Triassic and Jurassic. They are particularly common in many parts of Britain. These oysters lived on the sea bed in shallow waters, possibly in large colonies. The complete fossils consist of two articulated valves: a larger gnarly-shaped shell (the "toenail") and a smaller, flattened shell, the "lid". The soft parts of the animal occupied the cavity between the two shells, just like modern oysters. The shells also feature prominent growth bands. The larger, curved shell sat within the mud on the sea floor. These shells are sometimes found in fossil plates along with ''Turritella'', clams, and sometimes sharks' teeth and fossilized fish scales. Its distribution is common in areas of both Europe. A classic location to find thes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gigantostrea
''Gigantostrea'' is an extinct genus of marine bivalve mollusks belonging to the family Gryphaeidae. This genus is known in the fossil record from the Eocene to the Miocene The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recen ... (age range: from 48.6 to 15.97 million years ago). These fossils have been found in Europe and United States. Description Shells of ''Gigantostrea'' can reach a size of about . These fossil shells are brittle, inequivalve, with the lower valve convex and the upper valve flat or slightly concave. The lower valve was cemented to the substrate. Species Species within this genus include: * †''Gigantostrea gigantica'' Solander in Brander 1766 * †''Gigantostrea trigonalis'' Conrad 1854 References External links Album-fossile Eocene genus first appeara ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exogyra
''Exogyra'' is an extinct genus of fossil marine oysters in the family Gryphaeidae, the foam oysters or honeycomb oysters. These bivalves grew cemented by the more cupped left valve. The right valve is flatter, and the beak is curved to one side. ''Exogyra'' lived on solid substrates in warm seas during the Jurassic and Cretaceous periods. Taxonomy The former subgenus ''Exogyra'' ('' Aetostreon'') Bayle, 1878 is sometimes considered a separate genus, due to a lack of the fine set of parallel ribs (chomata) separated by pits, on the inner surface of the valves (which is present in the nominate subgenus). Species Distribution Fossils of ''Exogyra'' have been found in:''Exogyra'' at Fossilworks.org ;Jurassic Afgha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liostrea
''Liostrea'' is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae. These fossils range from the early Triassic Period to the Cenomanian Epoch of the late Cretaceous Period and were widely distributed geographically. They were encrusting organisms, attaching firmly to the substrate on their left shell, and were important Jurassic reef-forming organisms. The species ''L. erina'' and ''L. roemeri'' attached themselves to living ammonoids. ''Liostrea'' formed abundant ostreoliths (concretions composed of encrusting organisms) on the hardgrounds of the Jurassic Carmel Formation in southwestern Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to it .... ''Liostrea'' may be the earliest oyster lineage, with possible examples attached to ammonoids of the earli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hyotissa
''Hyotissa'' is a genus of large saltwater oysters, marine bivalve mollusks in the family Gryphaeidae.MolluscaBase eds. (2021). MolluscaBase. Hyotissa Stenzel, 1971. Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=204006 on 2021-03-13 Species in this genus are known as honeycomb oysters, or "foam oysters" because under magnification, their shell structure is foam-like. Species *''Hyotissa haitensis'' (Sowerby, 1850) *'' Hyotissa hyotis'' (Linnaeus, 1758) - Giant honeycomb oyster *''Hyotissa inermis'' (G. B. Sowerby II, 1871) *''Hyotissa mcgintyi'' (Harry, 1985) *''Hyotissa numisma'' (Lamarck, 1819) *''Hyotissa quercina'' (G. B. Sowerby II, 1871) *''Hyotissa sinensis'' (Gmelin, 1791) *''Hyotissa semiplana'' (de Sowerby 1825) ;Species brought into synonymy: * ''Hyotissa chemnitzii'' (Hanley, 1846): synonym of '' Dendostrea rosacea'' (Deshayes, 1836) * ''Hyotissa quercina'' (G. B. Sowerby II, 1871): synonym of ''Hyot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liostrea Strigilecula Mid Jurassic SW Utah
''Liostrea'' is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae. These fossils range from the early Triassic Period to the Cenomanian Epoch of the late Cretaceous Period and were widely distributed geographically. They were encrusting organisms, attaching firmly to the substrate on their left shell, and were important Jurassic reef-forming organisms. The species ''L. erina'' and ''L. roemeri'' attached themselves to living ammonoids. ''Liostrea'' formed abundant ostreoliths (concretions composed of encrusting organisms) on the hardgrounds of the Jurassic Carmel Formation in southwestern Utah Utah ( , ) is a state in the Mountain West subregion of the Western United States. Utah is a landlocked U.S. state bordered to its east by Colorado, to its northeast by Wyoming, to its north by Idaho, to its south by Arizona, and to it .... ''Liostrea'' may be the earliest oyster lineage, with possible examples attached to ammonoids of the earlie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aetostreon
''Aetostreon'' is an extinct genus or subgenus within the genus ''Exogyra'' of fossil marine oysters in the family Gryphaeidae The Gryphaeidae, common name the foam oysters or honeycomb oysters, are a family of marine bivalve mollusks. This family of bivalves is very well represented in the fossil record, however the number of living species is very few. All species .... Select species * †''Aetostreon latissimum'' (Lamarck, 1801) * †''Aetostreon pilmatuegrossum'' Rubilar & Lazo, 2009 * †''Aetostreon subsinuatum'' (Leymerie 1842) References Gryphaeidae Prehistoric bivalve genera Fossil taxa described in 1878 {{Paleo-bivalve-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamarck
Jean-Baptiste Pierre Antoine de Monet, chevalier de Lamarck (1 August 1744 – 18 December 1829), often known simply as Lamarck (; ), was a French naturalist, biologist, academic, and soldier. He was an early proponent of the idea that biological evolution occurred and proceeded in accordance with natural laws. Lamarck fought in the Seven Years' War against Prussia, and was awarded a commission for bravery on the battlefield. Posted to Monaco, Lamarck became interested in natural history and resolved to study medicine. Packard (1901), p. 15. He retired from the army after being injured in 1766, and returned to his medical studies. Lamarck developed a particular interest in botany, and later, after he published the three-volume work ''Flore françoise'' (1778), he gained membership of the French Academy of Sciences in 1779. Lamarck became involved in the Jardin des Plantes and was appointed to the Chair of Botany in 1788. When the French National Assembly founded the Muséum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
