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Pholadidae
Pholadidae, known as piddocks or angelwings, are a family of bivalve molluscs similar to a clam. Background Piddocks are unique in that each side of their shells is divided into 2 or 3 separate sections. Furthermore, one of the piddock's shells has a set of ridges or "teeth", which they use to grind away at clay or soft rock and create tubular burrows. The shape of these burrows are due to the rotating motion of the piddock as it grinds the rock to make its home. The piddock stays in the burrow it digs for the entirety of its eight-year lifespan, with only its siphon exposed to take in water that it filters for food. When the piddock dies and leaves an empty tubular burrow, other marine life such as sea anemone, crabs and other molluscs may use the burrow. Some species of Pholadidae may reach up to 18 cm (7″). Their coloration is typically white, though through consumption of red tide algae some may develop a pink coloration. * The angelwing species '' Cyrtopleura costa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyrtopleura Costata
''Cyrtopleura costata'', or the angel wing clam, is a bivalve mollusc in the family Pholadidae. It is found in shallow parts of the northwest Atlantic and also in the North Sea of Scotland coastline and west coast of the Adriatic Sea by a remote area in the Marche region in central Italy, living in the seabed, where it digs its burrows on a very slow revolving movement for years through soft sand and mud always to a max depth of 8ft but always below at the lowest tide.''Cyrtopleura costata'' Smithsonian Marine Station. Retrieved 2011-11-30. Description ''Cyrtopleura costata'' has a pair of brittle, asymmetric white valves and can grow to about in length. The anterior end is elongated and has a rounded point which is used for digging through the substrate. The posterior end is truncated and rounded ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barnea Candida
''Barnea candida'' is a marine bivalve mollusc in the family Pholadidae. Description The shell is long and covered in horizontal ribs, crossed by vertical ribs, forming a structure. On the intersections are scale formed spikes. A narrow and curved edge is located on the inside of the shell. Size * Length: up to 50 mm * Width: up to 20 mm. Colour Chalk-white, yellow-white or grey. Fossil ''Barnea candida'' is common in the North Sea region in deposits from the Holocene, the Eemian Stage and late Middle Pleistocene The Pleistocene ( , often referred to as the '' Ice age'') is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed .... References * , 1991. ''Schelpen van de Nederlandse kust.'' Jeugdbondsuitgeverij Stichting Uitgevrij KNNV, 165 pag. * , 2004. ''Veldgids Schelpen.'' KNNV Uitgeverij, , 234 pag. * , 1994. ''Nederlandse na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barnea (bivalve)
''Barnea'' is a genus of bivalves belonging to the family Pholadidae. The genus has cosmopolitan distribution. Species *'' Barnea alfredensis'' *'' Barnea australasiae'' *'' Barnea birmanica'' *''Barnea candida'' *'' Barnea davidi'' *'' Barnea dilatata'' *'' Barnea fragilis'' *'' arnea ghanaensis'' *'' Barnea japonica'' *'' Barnea lamellosa'' *'' Barnea manilensis'' *'' Barnea obturamentum'' *'' Barnea parva'' *''Barnea similis ''Barnea similis'', a rock borer or piddock, is a Marine (ocean), marine bivalve mollusc in the family (biology), family Pholadidae. References * Arthur William Baden Powell, Powell A. W. B., ''New Zealand Mollusca'', HarperCollins, William ...'' *'' Barnea subtruncata'' *'' Barnea truncata'' References {{Taxonbar, from=Q3804526 Pholadidae Bivalve genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pholas Dactylus
''Pholas dactylus'', or common piddock, is a bioluminescent clam-like species of marine mollusc found on the coasts of the North Atlantic and the Mediterranean Sea. It bores into gneiss Gneiss ( ) is a common and widely distributed type of metamorphic rock. It is formed by high-temperature and high-pressure metamorphic processes acting on formations composed of igneous or sedimentary rocks. Gneiss forms at higher temperatures a .... It was once a highly esteemed food in Europe.Gofas, S. (2012)Pholas dactylus Linnaeus, 1758 Accessed through: World Register of Marine Species on 2012-02-23 It is sensitive to light, retracting into its shell when exposed to it. Ancient history Pliny spoke of luminescence in the mouths of people who ate ''Pholas'', the rock-boring shell-fish, and of such importance is this phenomenon that it is even said to have gained the first king of Scotland his throne. Hippolytus of Rome tells us that it was a common pagan trick to use the luminescent prop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
10th Edition Of Systema Naturae
The 10th edition of ''Systema Naturae'' is a book written by Swedish naturalist Carl Linnaeus and published in two volumes in 1758 and 1759, which marks the starting point of zoological nomenclature. In it, Linnaeus introduced binomial nomenclature for animals, something he had already done for plants in his 1753 publication of ''Species Plantarum''. Starting point Before 1758, most biological catalogues had used polynomial names for the taxa included, including earlier editions of ''Systema Naturae''. The first work to consistently apply binomial nomenclature across the animal kingdom was the 10th edition of ''Systema Naturae''. The International Commission on Zoological Nomenclature therefore chose 1 January 1758 as the "starting point" for zoological nomenclature, and asserted that the 10th edition of ''Systema Naturae'' was to be treated as if published on that date. Names published before that date are unavailable, even if they would otherwise satisfy the rules. The onl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algae
Algae ( , ; : alga ) are any of a large and diverse group of photosynthetic, eukaryotic organisms. The name is an informal term for 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 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. Algae that are carried by water are plankton, specifically phytoplankton. Algae constitute a polyphyletic group since they do not include a common ancestor, and although their plastids seem to have a single ori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filter Feeder
Filter feeders are a sub-group of suspension feeding animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialized filtering structure. Some animals that use this method of feeding are clams, krill, sponges, baleen whales, and many fish (including some sharks). Some birds, such as flamingos and certain species of duck, are also filter feeders. Filter feeders can play an important role in clarifying water, and are therefore considered ecosystem engineers. They are also important in bioaccumulation and, as a result, as indicator organisms. Fish Most forage fish are filter feeders. For example, the Atlantic menhaden, a type of herring, lives on plankton caught in midwater. Adult menhaden can filter up to four gallons of water a minute and play an important role in clarifying ocean water. They are also a natural check to the deadly red tide. Extensive article on the role of menhaden in the ecosystem and possibl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
