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Gryphaeidae - Neopycnodonte Navicularis-001
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'' Fisc ... [...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 fin ... [...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 its .... ''Liostrea'' may be the earliest oyster lineage, with possible examples attached to ammonoids of the ... [...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] |
