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Pseudoscorpion
Pseudoscorpions, also known as false scorpions or book scorpions, are small, scorpion-like arachnids belonging to the order Pseudoscorpiones, also known as Pseudoscorpionida or Chelonethida. Pseudoscorpions are generally beneficial to humans since they prey on clothes moth larvae, carpet beetle larvae, booklice, ants, mites, and small flies. They are tiny, and are rarely noticed due to their small size, despite being common in many environments. When people do see pseudoscorpions, especially indoors, they are often mistaken for ticks or small spiders. Pseudoscorpions often carry out phoresis, a form of commensalism in which one organism uses another for the purpose of transport. Characteristics Pseudoscorpions belong to the class Arachnida. They are small arachnids with a flat, pear-shaped body, and pincer-like pedipalps that resemble those of scorpions. They usually range from in length. Pennsylvania State University, DepartmentEntomological Notes: Pseudoscorpion Fac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arachnida
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] |
Arachnid
Arachnida () is a class of joint-legged invertebrate animals ( arthropods), in the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, harvestmen, camel spiders, whip spiders and vinegaroons. Almost all adult arachnids have eight 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 Greek word (''aráchnē'', 'spider'), from the myth of the hubristic human weaver Arachne, who was turned into a spider. Almost all extant arachnids are 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 species, of which 47,000 are species of spiders. Morphology Almost all adult arachnids have eight legs, unli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phoresis
Phoresis or phoresy is a non-permanent, commensalistic interaction in which one organism (a phoront or phoretic) attaches itself to another (the host) solely for the purpose of travel. Phoresis has been observed directly in ticks and mites since the 18th century, and indirectly in fossils 320 million years old. It is not restricted to arthropods or animals; plants with seeds that disperse by attaching themselves to animals are also considered to be phoretic. ''Phoresis'' is rooted in the Greek words ''phoras'' (bearing) and ''phor'' (thief). The term, originally defined in 1896 as a relationship in which the host acts as a vehicle for its passenger, clashed with other terminology being developed at the time, so constraints on the length of time, feeding and ontogeny are now considered. Phoresis is used as a strategy for dispersal, seasonal migration, transport to new host/habitat escaping ephemeral habitats, and reducing inbreeding depression. In addition to the benef ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garypus Titanius
''Garypus titanius'', the giant pseudoscorpion, is the largest species of pseudoscorpion—small, scorpion-looking creatures—in the world. Critically endangered, it is restricted to Boatswain Bird Island, a small rocky island off Ascension Island in the South Atlantic Ocean. Pseudoscorpions are venomous arachnids (a group that includes spiders, ticks, and scorpions) and are generally tiny—around 3 mm (.1 in) long. The giant pseudoscorpion, though, can grow to five times that size at 11 mm (.5 in). It lives among seabird colonies, feeding mainly at night on smaller prey such as insects. It belongs to the Garypidae Garypidae is a family of pseudoscorpion Pseudoscorpions, also known as false scorpions or book scorpions, are small, scorpion-like arachnids belonging to the order Pseudoscorpiones, also known as Pseudoscorpionida or Chelonethida. Pseudoscorp ... family. The giant pseudoscorpion is threatened by non-native insects and animals, such as mice. It has died out o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mite
Mites are small arachnids (eight-legged arthropods). Mites span two large orders of arachnids, the Acariformes and the Parasitiformes, which were historically grouped together in the subclass Acari, but genetic analysis does not show clear evidence of a close relationship. Most mites are tiny, less than in length, and have a simple, unsegmented body plan. The small size of most species makes them easily overlooked; some species live in water, many live in soil as decomposers, others live on plants, sometimes creating galls, while others again are predators or parasites. This last type includes the commercially destructive ''Varroa'' parasite of honey bees, as well as scabies mites of humans. Most species are harmless to humans, but a few are associated with allergies or may transmit diseases. The scientific discipline devoted to the study of mites is called acarology. Evolution and taxonomy The mites are not a defined taxon, but is used for two distinct groups of arachnids ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Feaelloidea
The Feaelloidea are a superfamily of pseudoscorpions with two families, the Feaellidae with a single genus, and the Pseudogarypidae The Pseudogarypidae are a small family of pseudoscorpions. Most recent species are found in North America, while one species is endemic to Tasmania. Species * '' Neopseudogarypus'' J.C.H. Morris, 1948 :* '' Neopseudogarypus scutellatus'' J.C.H. ... with two. References * Joel Hallan's Biology CatalogPseudoscorpionida Arachnid superfamilies {{Pseudoscorpion-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sternophoroidea
The Sternophoridae are a family of pseudoscorpions with about 20 described species in three genera. While ''Afrosternophorus'' is an Old World genus, found mainly in Australasia (with, despite its name, only one African species), the other two genera are found in the New World, from El Salvador to the southern USA and in the Dominican Republic. Species * '' Afrosternophorus'' Beier, 1967 :* '' Afrosternophorus aethiopicus'' Beier, 1967 — Ethiopia :* '' Afrosternophorus anabates'' Harvey, 1985 — Australia :* '' Afrosternophorus araucariae'' Beier, 1971 — New Guinea :* '' Afrosternophorus cavernae'' Beier, 1982 — New Guinea :* '' Afrosternophorus ceylonicus'' Beier, 1973 — India, Sri Lanka :* '' Afrosternophorus chamberlini'' Redikorzev, 1938 — Laos, Vietnam :* '' Afrosternophorus cylindrimanus'' Beier, 1951 — Laos :* '' Afrosternophorus dawydoffi'' Beier, 1951 — Cambodia, Vietnam :* '' Afrosternophorus fallax'' Harvey, 1985 — Vietnam :* '' Afrosternophorus grayi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chthonioidea
The Chthonioidea are a superfamily of pseudoscorpions, representing the earliest diverging and most primitive living pseudoscorpions. The superfamily contains two families. *Pseudotyrannochthoniidae — worldwide (c. 5 genera, 50 species) * Chthoniidae — worldwide ( 40 + genera, 600+ species) Some authors consider the genus ''Lechytia ''Lechytia'' is a genus of pseudoscorpions in the subfamily Lechytiinae within the family Chthoniidae. It is the sole genus in its subfamily and contains 22 described species from many parts of the world.Biology Catalog Species * '' Lechytia ana ...'' to be in its own family Lechytiidae, rather than to reside in Chthoniidae.Biology CatalogLechytiidae Footnotes Arachnid superfamilies {{pseudoscorpion-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheliferoidea
The Cheliferoidea are a superfamily of pseudoscorpion Pseudoscorpions, also known as false scorpions or book scorpions, are small, scorpion-like arachnids belonging to the order Pseudoscorpiones, also known as Pseudoscorpionida or Chelonethida. Pseudoscorpions are generally beneficial to humans sin ...s. Families The superfamily contains the following families: * Atemnidae Kishida, 1929 (Chamberlin, 1931?) * Miratemnidae (Sometimes considered a subfamily of Atemnidae, Miratemninae) * Myrmochernetidae Chamberlin, 1931 (Junior synonym of Chernetidae) * Chernetidae Menge, 1855 * Withiidae Chamberlin, 1931 * Cheliferidae Risso, 1826 References Arachnid superfamilies {{Pseudoscorpion-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garypoidea
The Garypoidea are a superfamily of pseudoscorpion Pseudoscorpions, also known as false scorpions or book scorpions, are small, scorpion-like arachnids belonging to the order Pseudoscorpiones, also known as Pseudoscorpionida or Chelonethida. Pseudoscorpions are generally beneficial to humans sin ...s. The superfamily contains seven families: * Garypidae * Garypinidae * Geogarypidae * Larcidae * Olpiidae * Menthidae * Pseudochiriididae References Arachnid superfamilies {{pseudoscorpion-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scorpion
Scorpions are predatory arachnids of the order Scorpiones. They have eight legs, and are easily recognized by a pair of grasping pincers and a narrow, segmented tail, often carried in a characteristic forward curve over the back and always ending with a stinger. The evolutionary history of scorpions goes back 435 million years. They mainly live in deserts but have adapted to a wide range of environmental conditions, and can be found on all continents except Antarctica. There are over 2,500 described species, with 22 extant (living) families recognized to date. Their taxonomy is being revised to account for 21st-century genomic studies. Scorpions primarily prey on insects and other invertebrates, but some species hunt vertebrates. They use their pincers to restrain and kill prey, or to prevent their own predation. The venomous sting is used for offense and defense. During courtship, the male and female grasp each other's pincers and dance while he tries to move her onto his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commensalism
Commensalism is a long-term biological interaction ( symbiosis) in which members of one species gain benefits while those of the other species neither benefit nor are harmed. This is in contrast with mutualism, in which both organisms benefit from each other; amensalism, where one is harmed while the other is unaffected; parasitism, where one is harmed and the other benefits, and parasitoidism, which is similar to parasitism but the parasitoid has a free-living state and instead of just harming its host, it eventually ends up killing it. The commensal (the species that benefits from the association) may obtain nutrients, shelter, support, or locomotion from the host species, which is substantially unaffected. The commensal relation is often between a larger host and a smaller commensal; the host organism is unmodified, whereas the commensal species may show great structural adaptation consistent with its habits, as in the remoras that ride attached to sharks and other fish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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