|
Pisidium Tenuilineatum
''Pisidium tenuilineatum'', the fine-lined pea mussel, is a species of very small freshwater bivalve in the family Sphaeriidae. Distribution The species is native to Europe. * British Isles – listed in List of endangered species in the British Isles. It is rare in Great Britain. * Czech Republic – in Bohemia, in Moravia, critically endangered * Denmark * Germany – high endangered (''Stark gefährdet'') * Poland – Near Threatened (NT, mentioned as lower risk LR) * Netherlands * Slovakia – a rare species * Sweden * and other states References Further reading * Kuiper J.G.J. (1981). "The distribution of ''Pisidium tenuilineatum'' Stelfox and ''Pisidium annandalei'' Prashad in the Mediterranean area". ''Basteria ''Basteria'' is a bimonthly peer-reviewed scientific journal published by the Netherlands Malacological Society, covering research on molluscs. It was established in 1936 and is now published mostly in English. Since 2000, the editor-in-chief has b ...'', Leiden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arthur Wilson Stelfox
Arthur Wilson Stelfox (15 December 1883–19 May 1972) was an Irish naturalist and architect. Stelfox was a recognised authority on Hymenoptera and on non-marine Mollusca especially the genus ''Pisidium''. He also made important contributions to scientific knowledge concerning Irish botany and on identifying and describing remains from prehistoric sites in Ireland. Early years and education Stelfox was born in Belfast on 15 December 1883 the son of Jennie McIlwaine and James Stelfox. He was educated at Campbell College, Belfast and went on to study architecture in Ireland and England, being elected as an associate of the Royal Institute of British Architects on the 2 November 1908. Stelfox was an enthusiastic naturalist from his youth, encouraged by his father, who belonged to the Belfast Naturalists' Field Club and by Robert John Welch with whom he would later collaborate. His earliest known specimens are now held in the National Museums Liverpool and were collected i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Bivalve
Freshwater bivalves are one kind of freshwater mollusc, along with freshwater snails. They are bivalves that live in fresh water as opposed to salt water, which is the main habitat type for bivalves. The majority of species of bivalve molluscs live in the sea, but in addition, a number of different families live in fresh water (and in some cases, also in brackish water). These families belong to two different evolutionary lineages (freshwater mussels and freshwater clams), and the two groups are not closely related. Freshwater bivalves have a simple morphology that varies among taxa, and are distributed around most regions of the world. Species in the two groups vary greatly in size. Some pea clams (''Pisidium'' species) have an adult size of only 3 mm. In contrast, one of the largest species of freshwater bivalves is the swan mussel, in the family Unionidae; it can grow to a length of 20 cm, and usually lives in lakes or slow rivers. Freshwater pearl mussels are econo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaeriidae
Sphaeriidae is a family of small to minute freshwater bivalve molluscs in the order Sphaeriida. In the US, they are commonly known as pea clams or fingernail clams. Heard, William H. 1977. Reproduction of fingernail clams (Sphaeriidae: ''Sphaerium'' and ''Musculium''). Malacologia, 16: 421-455. Genera Genera: * Euperinae ** '' Byssanodonta'' d'Orbigny, 1846 ** ''Eupera'' Bourguignat, 1854 * Sphaeriinae ** ''Afropisidium'' Kuiper, 1962 ** ''Euglesa'' Jenyns, 1832 ** ''Musculium'' Link, 1807 ** '' Odhneripisidium'' Kuiper, 1962 ** ''Pisidium'' C. Pfeiffer, 1821 ** ''Sphaerium'' Scopoli, 1777 * fossils ** †'' Megasphaerioides'' Komatsu, J.-H. Chen & Q.-F. Wang, 2003 ** †'' Protosphaerium'' Hocknull, 2000 ** †'' Sphaericoncha'' Kolesnikov, 1980 Biology and ecology Sphaeriidae are hermaphrodites with internal fertilization. Developing young are incubated within their mother (ovoviviparity), and newborn clams look like miniature copies of the adults. Parasites and/or predat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Endangered Species In The British Isles
This is a list of United Kingdom Biodiversity Action Plan species. Some suffer because of loss of habitat, but many are in decline following the introduction of foreign species, which out-compete the native species or carry disease. See also the list of extinct animals of the British Isles. This list includes the 116 species identified as requiring action plans in the Biodiversity Steering Group's report of December 1995. Mammals *Scottish wildcat (''Felis silvestris grampia'') *Bottlenose dolphin (''Tursiops truncatus''), warm and temperate seas worldwide * European (brown) hare (''Lepus europaeus''), northern, central, and western Europe and western Asia *Hazel dormouse (''Muscardinus avellanarius''), northern Europe and Asia Minor *European otter (''Lutra lutra lutra''), Asia, Africa and Europe *Greater horseshoe bat (''Rhinolophus ferrumequinium''), Europe, Africa, South Asia and Australia *Harbour porpoise (''Phocoena phocoena''), coastal waters in the Northern Hemisphere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Non-marine Molluscs Of The Czech Republic
This is a list of the non-marine molluscs of the Czech Republic. That country is land-locked and therefore it has no marine molluscs, only land and freshwater species, including snails, slugs, freshwater clams and freshwater mussels. There are 247 species of molluscs living in the wild in the Czech Republic. In addition there are at least 11 gastropod species surviving in greenhouses. There are 219 gastropod species (50 freshwater and 169 land species) and 28 bivalve species living in the wild. There are also 11 introduced gastropod species (5 freshwater and 7 land species) and 4 bivalve species living in the wild in the Czech Republic. This is a total of 9 freshwater non-indigenous species living in natural habitats. ;Summary table of number of species There are 2 endemic species of molluscs in the Czech Republic: *'' Alzoniella slovenica'' in Moravia (and in Slovakia too) *'' Bulgarica nitidosa'' in Bohemia. History Historical lists from 19th century or overviews of Czec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Near Threatened
A near-threatened species is a species which has been categorized as "Near Threatened" (NT) by the International Union for Conservation of Nature as that may be vulnerable to endangerment in the near future, but it does not currently qualify for the threatened status. The IUCN notes the importance of re-evaluating near-threatened taxon at appropriate intervals. The rationale used for near-threatened taxa usually includes the criteria of vulnerable which are plausible or nearly met, such as reduction in numbers or range. Near-threatened species evaluated from 2001 onwards may also be ones which are dependent on conservation efforts to prevent their becoming threatened, whereas before this conservation-dependent species were given a separate category ("Conservation Dependent"). Additionally, the 402 conservation-dependent taxa may also be considered near-threatened. IUCN Categories and Criteria version 2.3 Before 2001, the IUCN used the version 2.3 Categories and Criteria ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Basteria
''Basteria'' is a bimonthly peer-reviewed scientific journal published by the Netherlands Malacological Society, covering research on molluscs. It was established in 1936 and is now published mostly in English. Since 2000, the editor-in-chief has been Edmund Gittenberger. A former editor-in-chief is Adolph Cornelis van Bruggen. The journal is named after Job Baster Job Baster, sometimes Hiob Baster, (2 April 1711, in Zierikzee – 6 March 1775) was a Dutch physician and naturalist who devoted himself almost entirely to the study of medicine and natural history. He studied and took his degree of doctor of ..., a Dutch naturalist of the 18th century. References Malacology journals[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pisidium
''Pisidium'' is a genus of very small or minute freshwater clams known as pill clams or pea clams, aquatic bivalve molluscs in the family Sphaeriidae, the pea clams and fingernail clams. In some bivalve classification systems, the family Sphaeriidae is referred to as Pisidiidae, and occasionally ''Pisidium'' species are grouped in a subfamily known as Pisidiinae. ''Pisidium'' and taphonomy In large enough quantities, the minute shells of these bivalves can affect environmental conditions, and this change in conditions can positively affect the ability of organic remains in the immediate environment to fossilize (one aspect of taphonomy). For example, in the Dinosaur Park Formation, the fossil remains of hadrosaur eggshells are rare. This is because the breakdown of tannins from the local coniferous vegetation caused the ancient waters to be acidic, and therefore usually eggshell fragments dissolved in the water before they had a chance to be fossilized. Hadrosaur eggshell fra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalves Described In 1918
Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like the radula and the odontophore. They include the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances. The shell of a bivalve is composed of calci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
