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Fissurellidae
Fissurellidae, common name the keyhole limpets and slit limpets, is a taxonomic family of limpet-like sea snails, marine gastropod molluscs in the clade Vetigastropoda.Rosenberg, G. (2012). Fissurellidae. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=111 on 2013-01-02 Their common name derives from the small hole in the apex of their cone-like shells. Although superficially resembling "true" limpets, they are in fact not closely related to them. Distribution The distribution of fissurellids is worldwide, from cold waters to tropical waters. Powell A. W. B., ''New Zealand Mollusca'', William Collins Publishers Ltd, Auckland, New Zealand 1979 Habitat Fissurellids live in habitats on and under rocks in the lower intertidal zones to deeper waters. Shell description Keyhole limpets somewhat resemble true limpets because of the simple conical shape of their shells, but in reality they are not closely related to true ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megathura Crenulata
''Megathura crenulata'' is a northeastern Pacific Ocean species of limpet in the family FissurellidaeRosenberg, G. (2015)''Megathura crenulata'' (Sowerby I, 1825).''In'': MolluscaBase (2015). Accessed through: World Register of Marine Species on 16 February 2016. known commonly as the great keyhole limpet''Megathura crenulata''. Hardy's Internet Guide to Marine Gastropods. or giant keyhole limpet. SeaLifeBase. ''Megathura'' is a monotypic genus; in other words, this is the only species in that genus. This species occurs along the rocky coast of western North America, its distribution extending from Southern California to the Baja California peninsula in Mexico. It is found in the intertidal zon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrofissurella
''Dendrofissurella'' is a monotypic genus of minute deepwater keyhole limpets, marine gastropod mollusks in the family Fissurellidae, the keyhole limpets and slit limpets. Taxonomy ''Dendrofissurella scutellum'' is the sole species in this genus. However, two geographic subspecies are recognized : * ''Dendrofissurella scutellum hiantula'' (Lamarck, 1822) (synonyms : ''Fissurella hiantula'', Lamarck, 1822; ''Fissurellidea hiantula'', Sowerby II, 1862; ''Amblychilepas scutellum hiantula'', Kilburn and Rippey, 1982; ''Fissurella incarnata'', Krauss, 1848; ''Fissurellidea incarnata'', Sowerby II, 1862; ''Megatebennus'' (section ''Amblychilepas'') ''incarnata'', Pilsbry, 1890; ''Fissurellidea incarnata maculata'', Turton, 1962;'' Fissurellidea multilineata'', Turton, 1932 ; ''Fissurellidea albanyana'', Turton, 1932; ''Fissurellidea nigrostrigata'', Turton, 1932) * ''Dendrofissurella scutellum scutellum'' ( Gmelin, 1791) (synonyms : ''Patella scutellum'', Gmelin, 1791; ''Fissurella s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emarginella
''Emarginella'' is a genus of small keyhole limpets, marine gastropod molluscs in the family Fissurellidae.Bouchet, P.; Gofas, S. (2012). Emarginella Pilsbry, 1891. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224511 on 2013-01-14 This genus has become a synonym of ''Emarginula'' Lamarck, 1801. Species * '' Emarginella eximia'' ( Adams, 1852) * '' Emarginella imella'' ( Dall, 1926) * '' Emarginella incisura'' ( Adams, 1852) * ''Emarginella okinawaensis ''Emarginula okinawaensis'' is a species of sea snail, a marine gastropod mollusk in the family Fissurellidae, the keyhole limpets and slit limpets.Bouchet, P. (2012). ''Emarginella okinawaensis'' Habe, 1953. Accessed through: World Register ...'' Habe, 1953 * '' Emarginella planulata'' ( Adams, 1852) * '' Emarginella sakuraii'' Habe, 1963 * '' Emarginella sibogae'' ( Schepman, 1908) ; Species brought into synonymy: * ''Emarginella biangulata'' ( Sowerby, 1901) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Medusafissurella
''Medusafissurella'' is a genus of minute deepwater keyhole limpets, marine gastropod mollusks or micromollusks in the family Fissurellidae, the keyhole limpets and slit limpets.Bouchet, P.; Gofas, S. (2012). Medusafissurella McLean & Kilburn, 1986. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=536032 on 2013-01-17 Etymology In Greek mythology Medusa was a Gorgon, a monster with snakes for hair. The radiating tentacles in ''Medusafissuralla'' recall the serpentine locks of this monster. Description ''Medusafissurella'' is closely associated with ''Amblychilepas'' and ''Dendrofissurella'' with which it shares radular and shell characters. But ''Medusafissurella'' has a smaller body than the species in ''Amblychilepas'', the genus to which it was previously assigned. The body of species in ''Medusafissurella'' is larger than the shell. The anterior part of the shell is raised but is markedly narrowed. This character d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diodora Cayenensis
''Diodora cayenensis'', the Cayenne keyhole limpet, is a species of small to medium-sized sea snail or limpet, a western Atlantic marine prosobranch gastropod mollusk in the family Fissurellidae, the keyhole limpets.Rosenberg, G. (2012). Diodora cayenensis (Lamarck, 1822). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=160265 on 2013-01-08 This species is named after Cayenne, the capital of French Guiana. The spelling using one "n" is original and is therefore retained. Distribution The Cayenne keyhole limpet is found from New Jersey south through the West Indies to Brazil; in the Gulf of Mexico and in the Caribbean Sea; off the Canary Islands The Canary Islands (; es, Canarias, ), also known informally as the Canaries, are a Spanish autonomous community and archipelago in the Atlantic Ocean, in Macaronesia. At their closest point to the African mainland, they are west of Morocc .... Shell description Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limpet
Limpets are a group of aquatic snails that exhibit a conical shell shape (patelliform) and a strong, muscular foot. Limpets are members of the class Gastropoda, but are polyphyletic, meaning the various groups called "limpets" descended independently from different ancestral gastropods. This general category of conical shell is known as "patelliform" (dish-shaped). All members of the large and ancient marine clade Patellogastropoda are limpets. Within that clade, the members of the Patellidae family in particular are often referred to as "true limpets". Other groups, not in the same family, are also called limpets of one type or another, due to the similarity of their shells' shape. Examples include the Fissurellidae ("keyhole limpet") family, which is part of the Vetigastropoda clade (many other members of the Vetigastropoda do not have the morphology of limpets) and the Siphonariidae ("false limpets"), which use a siphon to pump water over their gills. Behaviour and ecolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of a Gastropoda, gastropod or snail, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, tracum, is typically made of calcium carbonate precipitated into an organic matrix known as c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diatom
A diatom (Neo-Latin ''diatoma''), "a cutting through, a severance", from el, διάτομος, diátomos, "cut in half, divided equally" from el, διατέμνω, diatémno, "to cut in twain". is any member of a large group comprising several genera of algae, specifically microalgae, found in the oceans, waterways and soils of the world. Living diatoms make up a significant portion of the Earth's biomass: they generate about 20 to 50 percent of the oxygen produced on the planet each year, take in over 6.7 billion metric tons of silicon each year from the waters in which they live, and constitute nearly half of the organic material found in the oceans. The shells of dead diatoms can reach as much as a half-mile (800 m) deep on the ocean floor, and the entire Amazon basin is fertilized annually by 27 million tons of diatom shell dust transported by transatlantic winds from the African Sahara, much of it from the Bodélé Depression, which was once made up of a system of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sponge
Sponges, the members of the phylum Porifera (; meaning 'pore bearer'), are a basal animal clade as a sister of the diploblasts. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponges have unspecialized cells that can transform into other types and that often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes. Sponges were first to branch off the evolutionary tree from the last common ancestor of all animals, making them the sister group of all other animals. Etymology The term ''sponge'' derives from the Ancient Greek word ( 'sponge'). Overview Sponges are similar to other animals in that they are multicellular, he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detritus
In biology, detritus () is dead particulate organic material, as distinguished from dissolved organic material. Detritus typically includes the bodies or fragments of bodies of dead organisms, and fecal material. Detritus typically hosts communities of microorganisms that colonize and decompose (i.e. remineralize) it. In terrestrial ecosystems it is present as leaf litter and other organic matter that is intermixed with soil, which is denominated " soil organic matter". The detritus of aquatic ecosystems is organic material that is suspended in the water and accumulates in depositions on the floor of the body of water; when this floor is a seabed, such a deposition is denominated "marine snow". Theory The corpses of dead plants or animals, material derived from animal tissues (e.g. molted skin), and fecal matter gradually lose their form due to physical processes and the action of decomposers, including grazers, bacteria, and fungi. Decomposition, the process by which or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alga
Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular microalgae, such as ''Chlorella,'' ''Prototheca'' and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga which may grow up to in length. Most are aquatic and autotrophic (they generate food internally) and lack many of the distinct cell and tissue types, such as stomata, xylem and phloem that are found in land plants. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the ''Charophyta'', a division of green algae which includes, for example, ''Spirogyra'' and stoneworts. No definition of algae is generally accepted. One definition is that algae "have chlorophyll ''a'' as their primary photosynthetic pigment and lack a sterile covering of cells around t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subequal
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