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Glycymeris Yessoensis
''Glycymeris yessoensis'' is a species of bivalve mollusc in the family Glycymerididae. It can be found burrowing in soft sediment in shallow water in the Pacific Ocean around the coasts of China and Japan. It is often associated with a polychaete worm with which it forms a commensal relationship. Taxonomy and evolution This species was first described by the British malacologist George Brettingham Sowerby III in 1889 (or 1888). It has a long fossil record, having been found in formations in southwestern Sakhalin dating back to the lower middle Miocene, with numerous occurrences in the Neogene and Quaternary periods in northern Japan. In the fossils it is possible to observe changing patterns of drilling predation over the aeons, with the sites of drill holes varying with time, perhaps due to a change in the principle predators, from ''Glossaulax'' to '' Cryptonatica''. Almost unispecific beds of fossils of ''Glycymeris yessoensis'' are found in the Onma Formation in central ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
George Brettingham Sowerby III
George Brettingham Sowerby III (16 September 1843 – 31 January 1921) was a British conchologist, publisher, and illustrator. He, too, worked (like his father George Brettingham Sowerby II and his grandfather George Brettingham Sowerby I) on the ''Thesaurus Conchyliorium'', a comprehensive, beautifully illustrated work on molluscs. He was colour blind, and thus his daughter did most of the colouring of his engravings. External links Petit, R. E. (2009). ''George Brettingham Sowerby, I, II & III: their conchological publications and molluscan taxa''. Zootaxa. 2189: 1–218 See also *Sowerby family The Sowerby family () was a British family of several generations of naturalists, illustrators, botanists, and zoologists active from the late 18th century to the mid twentieth century. *James Sowerby (1757–1822) **James De Carle Sowerby (178 ... Conchologists 1843 births 1921 deaths {{Zoologist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quaternary
The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million years ago to the present. The Quaternary Period is divided into two epochs: the Pleistocene (2.58 million years ago to 11.7 thousand years ago) and the Holocene (11.7 thousand years ago to today, although a third epoch, the Anthropocene, has been proposed but is not yet officially recognised by the ICS). The Quaternary Period is typically defined by the cyclic growth and decay of continental ice sheets related to the Milankovitch cycles and the associated climate and environmental changes that they caused. Research history In 1759 Giovanni Arduino proposed that the geological strata of northern Italy could be divided into four successive formations or "orders" ( it, quattro ordini). The term "quaternary" was introduced by Jules Desn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polydora Glycymerica
''Polydora glycymerica'' is a species of annelid worm in the family Spionidae, native to the northwestern Pacific Ocean, where it lives commensally in association with a bivalve mollusc, usually ''Glycymeris yessoensis'' but occasionally with another species of clam. The worm intercepts food particles being drawn into the mollusc by its feeding current. Taxonomy This species was first described in 1993 by the Russian marine biologist Vasily I. Radashevsky, who placed it in the genus ''Polydora'' and gave it the specific epithet "''glycymerica''" because of its commensal relationship with the bivalve ''Glycymeris yessoensis''. The new species resembled '' Polydora vulgaris'', a worm from the South China Sea that is also associated with bivalve molluscs, although in this instance, ''Pinctada margaritifera'' and '' Hyotissa hyotis'' are the hosts. Researchers used starch gel electrophoresis to compare the number of isozyme loci and the allozymic variation present in both speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Host (biology)
In biology and medicine, a host is a larger organism that harbours a smaller organism; whether a parasitic, a mutualistic, or a commensalist ''guest'' (symbiont). The guest is typically provided with nourishment and shelter. Examples include animals playing host to parasitic worms (e.g. nematodes), cells harbouring pathogenic (disease-causing) viruses, a bean plant hosting mutualistic (helpful) nitrogen-fixing bacteria. More specifically in botany, a host plant supplies food resources to micropredators, which have an evolutionarily stable relationship with their hosts similar to ectoparasitism. The host range is the collection of hosts that an organism can use as a partner. Symbiosis Symbiosis spans a wide variety of possible relationships between organisms, differing in their permanence and their effects on the two parties. If one of the partners in an association is much larger than the other, it is generally known as the host. In parasitism, the parasite benefits a ... [...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 poss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intertidal Zone
The intertidal zone, also known as the foreshore, is the area above water level at low tide and underwater at high tide (in other words, the area within the tidal range). This area can include several types of habitats with various species of life, such as seastars, sea urchins, and many species of coral with regional differences in biodiversity. Sometimes it is referred to as the ''littoral zone'' or '' seashore'', although those can be defined as a wider region. The well-known area also includes steep rocky cliffs, sandy beaches, bogs or wetlands (e.g., vast mudflats). The area can be a narrow strip, as in Pacific islands that have only a narrow tidal range, or can include many meters of shoreline where shallow beach slopes interact with high tidal excursion. The peritidal zone is similar but somewhat wider, extending from above the highest tide level to below the lowest. Organisms in the intertidal zone are adapted to an environment of harsh extremes, living in water p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kamchatka Peninsula
The Kamchatka Peninsula (russian: полуостров Камчатка, Poluostrov Kamchatka, ) is a peninsula in the Russian Far East, with an area of about . The Pacific Ocean and the Sea of Okhotsk make up the peninsula's eastern and western coastlines, respectively. Immediately offshore along the Pacific coast of the peninsula runs the Kuril–Kamchatka Trench. The Kamchatka Peninsula, the Commander Islands, and the Karaginsky Island, constitute the Kamchatka Krai of the Russian Federation. The vast majority of the 322,079 inhabitants are ethnic Russians, although about 13,000 are Koryaks (2014). More than half of the population lives in Petropavlovsk-Kamchatsky (179,526 in 2010) and nearby Yelizovo (38,980). The Kamchatka peninsula contains the volcanoes of Kamchatka, a UNESCO World Heritage Site. Geography Politically, the peninsula forms part of Kamchatka Krai. The southern tip is called Cape Lopatka. (Lopatka is Russian for spade.) The circular ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Of Japan
The Sea of Japan is the marginal sea between the Japanese archipelago, Sakhalin, the Korean Peninsula, and the mainland of the Russian Far East. The Japanese archipelago separates the sea from the Pacific Ocean. Like the Mediterranean Sea, it has almost no tides due to its nearly complete enclosure from the Pacific Ocean. This isolation also affects faunal diversity and salinity, both of which are lower than in the open ocean. The sea has no large islands, bays or capes. Its water balance is mostly determined by the inflow and outflow through the straits connecting it to the neighboring seas and the Pacific Ocean. Few rivers discharge into the sea and their total contribution to the water exchange is within 1%. The seawater has an elevated concentration of dissolved oxygen that results in high biological productivity. Therefore, fishing is the dominant economic activity in the region. The intensity of shipments across the sea has been moderate owing to political issues, bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yellow Sea
The Yellow Sea is a marginal sea of the Western Pacific Ocean located between mainland China and the Korean Peninsula, and can be considered the northwestern part of the East China Sea. It is one of four seas named after common colour terms (the others being the Black Sea, the Red Sea and the White Sea), and its name is descriptive of the golden-yellow colour of the silt-laden water discharged from major rivers. The innermost bay of northwestern Yellow Sea is called the Bohai Sea (previously Pechihli Bay or Chihli Bay), into which flow some of the most important rivers of northern China, such as the Yellow River (through Shandong province and its capital Jinan), the Hai River (through Beijing and Tianjin) and the Liao River (through Liaoning province). The northeastern extension of the Yellow Sea is called the Korea Bay, into which flow the Yalu River, the Chongchon River and the Taedong River. Since 1 November 2018, the Yellow Sea has also served as the lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptonatica
''Cryptonatica'' is a genus of predatory sea snails, marine gastropod mollusks in the family Naticidae Naticidae, common name moon snails or necklace shells, is a family of medium to large-sized predatory sea snails, marine gastropod molluscs in the clade Littorinimorpha. The shells of the species in this family are mostly globular in shape. Nat ..., the moon snails. Species Species within the genus ''Cryptonatica'' include: * '' Cryptonatica adamsiana'' (Dunker, 1860) * '' Cryptonatica affinis'' (Gmelin, 1791) * '' Cryptonatica aleutica'' (Dall, 1919) * '' Cryptonatica andoi'' (Nomura, 1935) * '' Cryptonatica bathybii'' (Friele, 1879) * '' Cryptonatica figurata'' (G. B. Sowerby III, 1914) * '' Cryptonatica hirasei'' (Pilsbry, 1905) * '' Cryptonatica huanghaiensis'' Zhang, 2008 * '' Cryptonatica janthostoma'' (Deshayes, 1839) * '' Cryptonatica operculata'' (Jeffreys, 1885) * '' Cryptonatica purpurfunda'' S.-P. Zhang & P. Wei, 2010 * '' Cryptonatica ranzii'' (Kuroda, 1961) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glossaulax
''Glossaulax'' is a genus of large sea snails, marine gastropod mollusks in the family Naticidae, the moon snails.Bouchet, P. (2012). Glossaulax Pilsbry, 1929. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=570170 on 2012-05-30 Species * ''Glossaulax draconis'' (Dall, 1903) * ''Glossaulax epheba'' (Hedley, 1915) * ''Glossaulax petiveriana'' (Récluz, 1843) * ''Glossaulax reclusiana'' (Deshayes, 1839) * ''Glossaulax reiniana'' (Dunker, 1877) * † ''Glossaulax secunda'' (Rochebrune & Mabille, 1885) * ''Glossaulax vesicalis'' (Philippi, 1849) ;Species brought into synonymy: * ''Glossaulax aulacoglossa'' (Pilsbry & Vanatta, 1909): synonym of ''Neverita aulacoglossa'' (Pilsbry & Vanatta, 1909) * ''Glossaulax bicolor'' (Philippi, 1849): synonym of ''Glossaulax petiveriana'' (Récluz, 1843) * ''Glossaulax didyma'' (Röding, 1798): synonym of ''Neverita didyma ''Neverita didyma'', common name the bladder moon snail ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossil
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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