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Poromyidae
Poromyidae is a family of saltwater clams, marine bivalve molluscs in the order Anomalodesmata. The genus ''Dilemma'', described in 2008, is remarkable for being a predator of copepods, which is very unusual for a sessile mollusc. Genera and species Genera and species within the family Poromyidae include: *'' Cetomya'' Dall, 1889 *'' Dermatomya'' Dall, 1889 **'' Dermatomya buttoni'' Dall, 1916 ** '' Dermatomya mactroides'' ( Dall, 1889) * ''Dilemma'' Leal, 2008 *'' Lissomya'' Krylova, 1997 * '' Poromya'' Forbes, 1844 ** '' Poromya albida'' Dall, 1886 ** '' Poromya beringiana'' ( Dall, 1916) ** '' Poromya elongata'' Dall, 1886 ** ''Poromya granulata'' (Nyst and Westendorp, 1839) ** '' Poromya houbricki'' Bernard, 1989 ** '' Poromya laevis'' E. A. Smith, 1885 ** '' Poromya leonina'' ( Dall, 1916) ** '' Poromya malespinae'' (Ridewood, 1903) ** '' Poromya neaeroides'' Sequenza, 1876 ** '' Poromya neozelanica'' (Dell Dell is an American based technology company. It develo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dilemma (bivalve)
''Dilemma'' is a genus of marine bivalves of the family Poromyidae. The genus is remarkable for encompassing predators of isopods and ostracods, unusual for sessile molluscs. One species is known from the western Atlantic Ocean (Straits of Florida) and three from across the Pacific. Specimens have been found at depths between . The name of the genus refers to the dilemma A dilemma ( grc-gre, δίλημμα "double proposition") is a problem offering two possibilities, neither of which is unambiguously acceptable or preferable. The possibilities are termed the ''horns'' of the dilemma, a clichéd usage, but dis ... that the author of the new genus faced while diagnosing it. Species There are four species: * '' Dilemma frumarkernorum'' Leal, 2008 * '' Dilemma inexpectatum'' (Crozier, 1966) * '' Dilemma japonicum'' Sasaki & Leal, 2008 * '' Dilemma spectralis'' Leal, 2008 References Poromyidae Bivalve genera {{bivalve-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poromya Granulata (Sowerby)
''Poromya granulata'', or the granular poromya, is a species of marine bivalve mollusc in the family Poromyidae. It is unusual among bivalves in being carnivorous. It is found in more northerly parts of the Atlantic Ocean. Description ''Poromya granulata'' is a dull-white coloured shell with dome-shaped valves and grows to about long. The valves are thin and fragile, subequivalve and subequilateral. They are roughly oval in shape with a rounded anterior margin and a subtruncated, sloping posterior margin. The umbones are prominent. The surfaces of the valves have faint concentric sculpture lines and are covered in rows of fine granulations. The margins are smooth and the ligament is mostly internal. The right valve has a single cardinal tooth and the left valve has a ridge-like lateral tooth and a socket for the cardinal from the right valve. The inside of the valves is nacreous and the pallial line has a broad, shallow sinus. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poromya Granulata
''Poromya granulata'', or the granular poromya, is a species of marine bivalve mollusc in the family Poromyidae. It is unusual among bivalves in being carnivorous. It is found in more northerly parts of the Atlantic Ocean. Description ''Poromya granulata'' is a dull-white coloured shell with dome-shaped valves and grows to about long. The valves are thin and fragile, subequivalve and subequilateral. They are roughly oval in shape with a rounded anterior margin and a subtruncated, sloping posterior margin. The umbones are prominent. The surfaces of the valves have faint concentric sculpture lines and are covered in rows of fine granulations. The margins are smooth and the ligament is mostly internal. The right valve has a single cardinal tooth and the left valve has a ridge-like lateral tooth and a socket for the cardinal from the right valve. The inside of the valves is nacreous and the pallial line has a broad, shallow sinus. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalve
Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class (biology), class of marine and freshwater Mollusca, 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, Cockle (bivalve), cockles, mussels, scallops, and numerous other family (biology), 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 Ctenidium (mollusc), 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 nekton, swim. The shipworms bore into wood, clay, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anomalodesmata
Anomalodesmata is an superorder of saltwater clams, marine bivalve molluscs. This grouping was formerly recognised as a taxonomic subclass. It is called a superorder in the current World Register of Marine Species, despite having no orders, to parallel it with sister taxon Imparidentia, which does have orders. Description The shells of species in this order are of equal size, as are the muscles that hold them closed, and the margins at the hinges are thickened. The margins of the mantle are also fused, and there is only a single hinge tooth, if any. Families In 2010, a new proposed classification system for the Bivalvia was published in ''Malacologia'' by Bieler, Carter & Coan revising the classification of the Bivalvia, including the order Anomalodesmata.Bieler, R., Carter, J.G. & Coan, E.V. (2010) ''Classification of Bivalve families''. Pp. 113-133, in: Bouchet, P. & Rocroi, J.P. (2010), ''Nomenclator of Bivalve Families. Malacologia'' 52(2): 1-184 The following tree is t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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