|
Physella Hordacea
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up and the aperture facing the observer, the aperture is on the left-hand side. The shells of ''Physella'' species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or ''P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Acuta
''Physella acuta'' is a species of small, left-handed or sinistral, air-breathing freshwater snail, an aquatic gastropod mollusk in the family Physidae. Common names include European physa, tadpole snail, bladder snail, and acute bladder snail. In addition, ''Physa acuta'', ''Physa heterostropha'' (Say, 1817) and ''Physa integra'' (Haldeman, 1841) are synonyms of ''Physella acuta'' (Draparnaud, 1805). Etymology The etymology of the name ''Physella'' is obscure but could be ultimately from a Greek root. "Physella" (as a place name) is recorded in Giovanni Gemisto's printed edition of Pliny's encyclopedia, perhaps lifted from Ermolao Barbaro's ''Castigationes Plinianae'' where it is recorded as ''Physcella''. The French naturalist Jacques Draparnaud was the first to describe a species of the genus ''Physella'' and coined the name. Shell description Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the aperture facing the ob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod
The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. There are many thousands of species of sea snails and slugs, as well as freshwater snails, freshwater limpets, and land snails and slugs. The class Gastropoda contains a vast total of named species, second only to the insects in overall number. The fossil history of this class goes back to the Late Cambrian. , 721 families of gastropods are known, of which 245 are extinct and appear only in the fossil record, while 476 are currently extant with or without a fossil record. Gastropoda (previously known as univalves and sometimes spelled "Gasteropoda") are a major part of the phylum Mollusca, and are the most highly diversified class in the phylum, with 65,000 to 80,000 living snail and slug species. The anatomy, behavior, feeding, and re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Costata
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up and the aperture facing the observer, the aperture is on the left-hand side. The shells of ''Physella'' species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or ''Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Cooperi
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up and the aperture facing the observer, the aperture is on the left-hand side. The shells of ''Physella'' species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or ''Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Conoidea
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, Aquatic animal, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up and the aperture facing the observer, the aperture is on the left-hand side. The shells of ''Physella'' species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heteros ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Columbiana
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up and the aperture facing the observer, the aperture is on the left-hand side. The shells of ''Physella'' species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or ''Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Boucardi
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up and the aperture facing the observer, the aperture is on the left-hand side. The shells of ''Physella'' species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or ''Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Bottimeri
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up and the aperture facing the observer, the aperture is on the left-hand side. The shells of ''Physella'' species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or ''Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NatureServe
NatureServe, Inc. is a non-profit organization based in Arlington County, Virginia, US, that provides proprietary wildlife conservation-related data, tools, and services to private and government clients, partner organizations, and the public. NatureServe reports being "headquartered in Arlington, Virginia, with regional offices in four U.S. locations and in Canada." In calendar year 2011 they reported having 86 employees, 6 volunteers, and 15 independent officers. History The Nature Conservancy reports that in 2000 it spun off its 85-center Natural Heritage Network "into a new independent organization, the Association for Biodiversity Information (later renamed NatureServe)." NatureServe reports that it was established in 1994 as the Association for Biodiversity Information. In 2001 the IRS approved a name change to NatureServe that was requested in 1999, while maintaining the organization's 501(c)(3) tax-exempt status granted in July 1995. NatureServe's website declares that it i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Bermudezi
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up and the aperture facing the observer, the aperture is on the left-hand side. The shells of ''Physella'' species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or ''Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physella Ancillaria
''Physella'' is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae. These snails eat algae, diatoms and other detritus. Shell description Snails in the family Physidae have shells that are sinistral, which means that if the shell is held with the spire pointing up and the aperture facing the observer, the aperture is on the left-hand side. The shells of ''Physella'' species have a long and large aperture, a pointed spire, and no operculum. The shells are thin and corneous and rather transparent. Species Species in the genus include: * ''Physella acuta'' (Draparnaud, 1805) - Pewter Physa, type species, synonyms: ''Physella heterostropha'' (Say, 1817), ''Physella integra'' (Haldeman, 1841)Dillon R. T., Wethington A. R., Rhett J. M. & Smith T. P. (2002). "Populations of the European freshwater pulmonate ''Physa acuta'' are not reproductively isolated from American ''Physa heterostopha'' or ''Ph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Detritus
In biology, detritus () is dead particulate organic material, as distinguished from dissolved organic material. Detritus typically includes the bodies or fragments of bodies of dead organisms, and fecal material. Detritus typically hosts communities of microorganisms that colonize and decompose (i.e. remineralize) it. In terrestrial ecosystems it is present as leaf litter and other organic matter that is intermixed with soil, which is denominated " soil organic matter". The detritus of aquatic ecosystems is organic material that is suspended in the water and accumulates in depositions on the floor of the body of water; when this floor is a seabed, such a deposition is denominated "marine snow". Theory The corpses of dead plants or animals, material derived from animal tissues (e.g. molted skin), and fecal matter gradually lose their form due to physical processes and the action of decomposers, including grazers, bacteria, and fungi. Decomposition, the process by which or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
