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Unionicola Aculeata
''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ''Unionicola crassipes'' and ''Unionicola minor'' are associated with sponges of family Spongillidae. The association with mussels can be described as symbiotic. There is evidence that mites consume host tissue and can be associated with reduced host fitness, although the causal direction of the latter remains unclear. Species include the following: * ''Unionicola gracilipalpis'' * ''Unionicola figuralis'' * ''Unionicola crassipes ''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ...'' * '' Unionicola aculeata'' * '' Unionicola ypsilophora'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Samuel Stehman Haldeman
Samuel Stehman Haldeman (August 12, 1812 – September 10, 1880) was an American naturalist and philologist. During a long and varied career he studied, published, and lectured on geology, conchology, entomology and philology. He once confided, "I never pursue one branch of science more than ten years, but lay it aside and go into new fields." Early life and education Haldeman was born in Locust Grove, Pennsylvania on August 12, 1812, the oldest of seven children of Henry Haldeman and Frances Stehman Haldeman. Locust Grove was the family estate on the Susquehanna River, twenty miles below Harrisburg. His father was a prosperous businessman and his mother was an accomplished musician who died when Haldeman was twelve years old. In 1826, he was sent to Harrisburg to attend school at the Classical Academy, run by John M. Keagy. After two years in the academy, he enrolled at Dickinson College where his interest in natural history was encouraged by his professor, Henry Darwin Rogers, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arachnids
Arachnida () is a Class (biology), class of joint-legged invertebrate animals (arthropods), in the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, opiliones, harvestmen, Solifugae, camel spiders, Amblypygi, whip spiders and Thelyphonida, vinegaroons. Almost all adult arachnids have eight Arthropod leg, legs, although the front pair of legs in some species has converted to a sensory function, while in other species, different appendages can grow large enough to take on the appearance of extra pairs of legs. The term is derived from the Ancient Greek, Greek word (''aráchnē'', 'spider'), from the myth of the hubristic human weaver Arachne, who was turned into a spider. Almost all Extant taxon, extant arachnids are terrestrial animal, terrestrial, living mainly on land. However, some inhabit freshwater environments and, with the exception of the pelagic zone, marine environments as well. They comprise over 100,000 named ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unionicolidae
Unionicolidae is a family of prostigs in the order Trombidiformes. There are about 5 genera and at least 40 described species in Unionicolidae. Genera * '' Huitfeldtia'' Thor, 1898 * '' Koenikea'' Wolcott, 1900 * '' Najadicola'' Piersig, 1897 * '' Neumania'' Lebert, 1879 * ''Unionicola ''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ...'' Haldeman, 1842 References Further reading * * * * Trombidiformes Acari families {{trombidiformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmopolitan Distribution
In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The extreme opposite of a cosmopolitan species is an endemic one, being found only in a single geographical location. Qualification The caveat “in appropriate habitat” is used to qualify the term "cosmopolitan distribution", excluding in most instances polar regions, extreme altitudes, oceans, deserts, or small, isolated islands. For example, the housefly is highly cosmopolitan, yet is neither oceanic nor polar in its distribution. Related terms and concepts The term pandemism also is in use, but not all authors are consistent in the sense in which they use the term; some speak of pandemism mainly in referring to diseases and pandemics, and some as a term intermediate between endemism and cosmopolitanism, in effect regarding pandemism as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unionicola Crassipes
''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but '' Unionicola crassipes'' and '' Unionicola minor'' are associated with sponges of family Spongillidae Spongilidae is a family of sponges that live in freshwater lakes and rivers. The following genera are recognized in the family: * ''Anheteromeyenia'' Schröder, 1927 * ''Corvoheteromeyenia'' Ezcurra de Drago, 1979 * ''Corvospongilla'' Annandale, .... The association with mussels can be described as symbiotic. There is evidence that mites consume host tissue and can be associated with reduced host fitness, although the causal direction of the latter remains unclear. Species include the following: * '' Unionicola gracilipalpis'' * '' Unionicola figuralis'' * '' Unionicola crassipes'' * '' Unionicola aculeata'' * '' Unionicola ypsilopho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unionicola Minor
''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ''Unionicola crassipes'' and '' Unionicola minor'' are associated with sponges of family Spongillidae. The association with mussels can be described as symbiotic. There is evidence that mites consume host tissue and can be associated with reduced host fitness, although the causal direction of the latter remains unclear. Species include the following: * '' Unionicola gracilipalpis'' * '' Unionicola figuralis'' * ''Unionicola crassipes ''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ...'' * '' Unionicola aculeata'' * '' Unionicola ypsilophora ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spongillidae
Spongilidae is a family of sponges that live in freshwater lakes and rivers. The following genera are recognized in the family: * ''Anheteromeyenia'' Schröder, 1927 * ''Corvoheteromeyenia'' Ezcurra de Drago, 1979 * ''Corvospongilla'' Annandale, 1911 * ''Dosilia'' Gray, 1867 * ''Duosclera'' Reiswig & Ricciardi, 1993 * ''Ephydatia'' Lamouroux, 1816 * ''Eunapius (genus), Eunapius'' Gray, 1867 * ''Heteromeyenia'' Potts, 1881 * ''Heterorotula'' Penney & Racek, 1968 * ''Nudospongilla'' Annandale, 1918 * ''Pachyrotula'' Volkmer-Ribeiro & Rützler, 1997 * ''Pectispongilla'' Annandale, 1909 * ''Pottsiela'' Volkmer-Ribeiro, Souza-Machado, Furstenau-Oliveira, Vieira-Soares, 2010 * ''Racekiela'' Bass & Volkmer-Ribeiro, 1998 * ''Radiospongilla'' Penney & Racek, 1968 * ''Sanidastra'' Volkmer-Ribeiro & Watanabe, 1983 * ''Saturnospongilla'' Volkmer-Ribeiro, 1976 * ''Spongilla'' Lamarck, 1816 * ''Stratospongilla'' Annandale, 1909 * ''Trochospongilla'' Vejdovsky, 1888 * ''Umborotula'' Penney & Rac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unionicola Gracilipalpis
''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ''Unionicola crassipes'' and ''Unionicola minor'' are associated with sponges of family Spongillidae. The association with mussels can be described as symbiotic. There is evidence that mites consume host tissue and can be associated with reduced host fitness, although the causal direction of the latter remains unclear. Species include the following: * '' Unionicola gracilipalpis'' * '' Unionicola figuralis'' * ''Unionicola crassipes ''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ...'' * '' Unionicola aculeata'' * '' Unionicola ypsilophora' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unionicola Figuralis
''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ''Unionicola crassipes'' and ''Unionicola minor'' are associated with sponges of family Spongillidae. The association with mussels can be described as symbiotic. There is evidence that mites consume host tissue and can be associated with reduced host fitness, although the causal direction of the latter remains unclear. Species include the following: * ''Unionicola gracilipalpis'' * '' Unionicola figuralis'' * ''Unionicola crassipes ''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ...'' * '' Unionicola aculeata'' * '' Unionicola ypsilophora'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unionicola Aculeata
''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ''Unionicola crassipes'' and ''Unionicola minor'' are associated with sponges of family Spongillidae. The association with mussels can be described as symbiotic. There is evidence that mites consume host tissue and can be associated with reduced host fitness, although the causal direction of the latter remains unclear. Species include the following: * ''Unionicola gracilipalpis'' * ''Unionicola figuralis'' * ''Unionicola crassipes ''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ...'' * '' Unionicola aculeata'' * '' Unionicola ypsilophora'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unionicola Ypsilophora
''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ''Unionicola crassipes'' and ''Unionicola minor'' are associated with sponges of family Spongillidae. The association with mussels can be described as symbiotic. There is evidence that mites consume host tissue and can be associated with reduced host fitness, although the causal direction of the latter remains unclear. Species include the following: * ''Unionicola gracilipalpis'' * ''Unionicola figuralis'' * ''Unionicola crassipes'' * ''Unionicola aculeata ''Unionicola'' is a genus of freshwater arachnids, belonging to the family Unionicolidae. The genus was described in 1842 by Samuel Stehman Haldeman. The genus has cosmopolitan distribution. Most ''Unionicola'' are associated with mollusks, but ...'' * '' Unionicola ypsilophora'' ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trombidiformes
The Trombidiformes are a large, diverse order of mites. Taxonomy In 1998, Trombidiformes was divided into the Sphaerolichida and the Prostigmata. The group has few synapomorphies by which it can be defined, unlike the other major group of acariform mites, Sarcoptiformes. Its members include medically important mites (such as ''Demodex'', the chiggers, and scrub-itch mites) and many agriculturally important species, including the spider mites (Tetranychidae). The superfamily Eriophyoidea, traditionally considered members of the Trombidiformes, have been found to be basal mites in genomic analyses, sister to the clade containing Sarcoptiformes and Trombidiformes. The 2004 classification retained the two suborders, comprising around 125 families and more than 22,000 described species. In the 2011 revised classification, the order now contains 151 families, 2235 genera and 25,821 species, and there were another 10 species with 24 species that present only as fossils. These 151 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
