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Sphaerium
''Sphaerium'' is a genus of very small freshwater clams, aquatic bivalve molluscs in the family Sphaeriidae, known as the fingernail clams. The small clams in this genus are unusual in that many of them, such as '' Sphaerium corneum'', can climb around underwater on aquatic plants, using their long and strong foot. Species * Subgenus ''Sphaerium'' Scopoli, 1777 :*'' Sphaerium corneum'' (Linnaeus, 1758) – European fingernail clam * Subgenus ''Nucleocyclas'' Alimov & Starobogatov, 1968 :* '' Sphaerium nucleus'' (Studer, 1820) :* ''Sphaerium ovale'' ( A. Férussac, 1807) * Subgenus ''Parasphaerium'' Alimov & Starobogatov, 1968 :*''Sphaerium nitidum'' Clessin, 1876 – Arctic fingernail clam * Subgenus ''Amesoda'' Rafinesque, 1820 :* ''Sphaerium rivicola'' (Lamarck, 1818) * Subgenus ''Cyrenastrum'' Bourguignat, 1854 :* '' Sphaerium solidum'' (Normand, 1844) * Without subgenus :*'' Sphaerium asiaticum'' (Martens, 1864) :* ''Sphaerium bequaerti ''Sphaerium bequaerti'' is a sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaerium Nucleus
''Sphaerium nucleus'' is a freshwater bivalve of the family Sphaeriidae. It has been often confused with ''Sphaerium corneum'' and is consequently quite poorly known. Description ''Sphaerium nucleus'' is a very small bivalve which may grow up to 8mm in width and length. It differs from ''Sphaerium corneum'' only in details. Like almost all bivalves, it is a filter-feeder. Taxonomy ''Sphaerium nucleus'' was described by Studer 1820, who placed it in the genus ''Cyclas''. It was later thought to be a subspecies of ''Sphaerium corneum''. Subsequently it was raised to a full species again as ''Sphaerium nucleus'' (Studer, 1820) due to its having a different form of kidney, and the shell having a broad hinge plate, dense porosity and more tumid shells with broad umbones. Unlike ''S. corneum'' it has a preference for temporary habitats. Distribution ''S. nucleus'' occurs widely in Europe, from Spain to Ukraine. It appears to be absent from Russia. * Austria * Britain and Ireland ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaerium Corneum
''Sphaerium corneum'', also known as the European fingernailclam, is a very small freshwater clam, an aquatic bivalve mollusk in the family Sphaeriidae, the fingernail clams. Description The shell is fairly globular and can grow up to 9–13.5 mm in size. The color of the shell is usually a brown to gray with the juveniles being a yellow color. Their shells exhibit striae, thin parallel rows of elevated lines. Revisiondate: 3/23/2007 Ecology These small clams are found in shallow, freshwater habitats with slow moving waters, including freshwater lakes, rivers and creeks. As with most bivalves, ''Sphaerium corneum'' is mainly a filter feeder and thus prefers more eutrophic waters that provide a greater food source. These clams have exhibited a unique ability to climb up plants and structures around their habitat to find more optimal locations for feeding. They also are known to deposit feed in times of low current or food availability. This species has shown a preference ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaerium Beckmani
''Sphaerium beckmani'' is an extinct species of fossil freshwater pea clams from the Late Cretaceous deposits of North America. This species was first described by the American paleontologist Loris Shano Russell in 1976. The specimens were collected by the American paleontologist Karl M. Waage from 1961 to 1962 from the Hell Creek Formation of eastern Montana. The locality is dated to the late Maastrichtian Age (around 66.0 to 72.1 million years ago). Since the Sphaerium beckmani had a hard shell as it was a pea clam it was used for the protection of themselves from predators and severe conditions which is what the Phylum In biology, a phylum (; plural: phyla) is a level of classification or taxonomic rank below kingdom and above class. Traditionally, in botany the term division has been used instead of phylum, although the International Code of Nomenclatu ... Mollusca means. References beckmani Cretaceous bivalves Late Cretaceous animals of North America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaerium Novaezelandiae
''Sphaerium novaezelandiae'' is a very small freshwater clam, an aquatic bivalve mollusc, in the family Sphaeriidae, sometimes known as the fingernail clams. Its native to New Zealand New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 List of islands of New Zealand, smaller islands. It is the ... References * Powell A. W. B., ''New Zealand Mollusca'', William Collins Publishers Ltd, Auckland, New Zealand 1979 Bivalves of New Zealand novaezelandiae Bivalves described in 1854 {{Sphaeriidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaerium Solidum
''Sphaerium solidum'', the solid orb mussel, is a species of freshwater bivalve from family Sphaeriidae. Distribution and conservation status * Not listed in IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biol ... – not evaluated (NE) * Germany – critically endangered (''vom Aussterben bedroht'') * Poland – endangered (EN) * Slovakia References * , & 2011. Phylogeny of Sphaerium solidum (Bivalvia) based on karyotype and sequences of 16S and ITS1 rDNA. '' Central European Journal of Biology'' 10:286 Sphaerium, solidum Bivalves described in 1844 {{Sphaeriidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaerium Rhomboideum
''Sphaerium rhomboideum'', the rhomboid fingernailclam, is a species of freshwater clams in the family 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: ''Sphaer .... It is found in North America. References External links * ''Sphaerium rhomboideum''at mussel-project.uwsp.edu rhomboideum Bivalves described in 1822 {{Sphaeriidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaerium Asiaticum
''Sphaerium asiaticum'' is a species of bivalve belonging to the family 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: ''Sphaer .... Per IUCN, the species has the status "least concern". References asiaticum {{Improve categories, date=February 2022 ... [...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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sphaerium Stuhlmanni
''Sphaerium stuhlmanni'' is a species of freshwater bivalve in the family Sphaeriidae. It is endemic to Lake Victoria in Kenya, Tanzania and Uganda }), is a landlocked country in East Africa. The country is bordered to the east by Kenya, to the north by South Sudan, to the west by the Democratic Republic of the Congo, to the south-west by Rwanda, and to the south by Tanzania. The south .... It occurs on muddy and sandy bottoms, typically in shallow waters (0–10 m depth) but potentially down to 50 m depth. References stuhlmanni Freshwater animals of Africa Molluscs of Africa Molluscs of Kenya Invertebrates of Tanzania Invertebrates of Uganda Freshwater bivalves Molluscs described in 1897 Taxa named by Eduard von Martens Taxonomy articles created by Polbot {{Sphaeriidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
