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Philodromus Aureolus
''Philodromus aureolus'', the wandering crab spider, is a mainly European running crab spider of the family Philodromidae. The taxonomy of the species group named after ''Philodromus aureolus'' is in a state of flux and a number of new species have recently been recognised. Description The prosoma often has a broad bright median band, which is plain. The legs are yellowish grey or brown with dark spots. The opisthosoma is very variably coloured, brown or yellowish brown, mostly spotted with bright median band and often with a dark cardiac mark that reaches the second pair of sigillae, and with dark chevrons. The male often more intensely patterned, although sometimes males may be plain dark brown. The body length of a male is 3.5-6.5 mm, that of females 4-8.5 mm. Biology ''Philodromus aureolus'' hunts by relying on camouflage, stealth and speed to hunt prey. The males are bright green, the females lighterer in colour and it is thought that they can change colour to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Alexander Clerck
Carl Alexander Clerck (1709 – 22 July 1765) was a Sweden, Swedish entomologist and arachnology, arachnologist. Clerck came from a family in the petty Swedish nobility, nobility and entered the University of Uppsala in 1726. Little is known of his studies; although a contemporary of Carl Linnaeus, Linnaeus, it is unknown whether he had any contact with him during his time in Uppsala. His limited means forced him to leave university early and enter into government service, later ending up working in the administration of the City of Stockholm. His interest in natural history appears to have come at a more mature age, influenced by a lecture of Linnaeus he attended in Stockholm in 1739. In the following years he collected and categorized many spiders, published together with more general observations on the morphology and behaviour of spiders, in his ''Svenska Spindlar'' ("Swedish spiders", 1757, also known by its Latin subtitle, ''Aranei Suecici''). He also started the publication ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philodromidae
Philodromidae, also known as philodromid crab spiders and running crab spiders, is a family of araneomorph spiders first described by Tord Tamerlan Teodor Thorell in 1870 (then known as subfamily Philodrominae within Thomisidae). It contains over 500 species in thirty genera. The most common genus is ''Philodromus'' which is widespread, similar to ''Ebo''. Other common genera include the elongate grass-dwelling '' Tibellus'' and the widespread '' Thanatus'', which includes the house crab spider that commonly captures flies on and in buildings. Description Philodromids have a crab-like shape due to the first two pairs of legs being oriented sideways (laterigrade). This is superficially similar to the "true" crab spiders (Thomisidae), such as ''Misumena vatia,'' but these families are not as closely related as previously thought. Unlike crab spiders, the legs are generally similar in size, though the second leg pair may be significantly longer than the first pair. This is most e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prosoma
The cephalothorax, also called prosoma in some groups, is a tagma of various arthropods, comprising the head and the thorax fused together, as distinct from the abdomen behind. (The terms ''prosoma'' and ''opisthosoma'' are equivalent to ''cephalothorax'' and ''abdomen'' in some groups.) The word ''cephalothorax'' is derived from the Greek words for head (, ') and thorax (, '). This fusion of the head and thorax is seen in chelicerates and crustaceans; in other groups, such as the Hexapoda (including insects), the head remains free of the thorax. In horseshoe crabs and many crustaceans, a hard shell called the carapace covers the cephalothorax. Arachnid anatomy Fovea The fovea is the centre of the cephalothorax and is located behind the head (only in spiders).Dalton, Steve (2008). ''Spiders; The Ultimate Predators''. A & C Black, London. P.p. 19. . It is often important in identification. It can be transverse or procurved Smith, A. M. (1990c). Baboon spiders: Tarantulas of Afr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opisthosoma
The opisthosoma is the posterior part of the body in some arthropods, behind the prosoma (cephalothorax). It is a distinctive feature of the subphylum Chelicerata (arachnids, horseshoe crabs and others). Although it is similar in most respects to an abdomen (and is often referred to as such), the opisthosoma is differentiated by its inclusion of the respiratory organs (book lungs or book gills) and the heart. Segments The number of segments and appendages on the opisthosoma vary. Scorpions have 13, but the first is only seen during its embryological development. Other arachnids have fewer; harvestmen, for instance, have only ten. In general, appendages are absent or reduced, although in horseshoe crabs they persist as large plate-like limbs, called opercula or branchiophores, bearing the book gills, and that function in locomotion and gas exchange. In most chelicerates the opisthosomal limbs are greatly reduced and persist only as specialized structures, such as the silk-producing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philodromus
''Philodromus'' is a genus of philodromid crab spiders. Spiders in this genus are distinctively flattened. The more than 250 described species are distributed throughout the Holarctic region, with few species reaching into more southern regions. Some are found in certain parts of Africa, with sporadic species occurring up to Australia. Only one species (''P. traviatus'') is found in (northern) South America. 16 species occur in Central Europe. Species Selected examples of ''Philodromus'' species: * '' P. aureolus'' * '' P. cespitum'' * '' P. dispar'' * '' P. fallax'' * '' P. margaritatus'' * '' P. rufus'' * '' P. rufus vibrans'' * '' P. vulgaris'' Dubious names '' Nomina dubia'' (dubious names) include: *''Philodromus depriesteri'' (Braun, 1965) *''Philodromus micans'' (Menge, 1875) Gallery Philodromus margaritatus.ogv, ''Philodromus margaritatus'' Metallic Crab Spider - Philodromus marxi, Leesylvania State Park, Woodbridge, Virginia.jpg, Male metallic crab spider ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Arachnological Society
The British Arachnological Society (BAS) is the UK’s first body devoted exclusively to the study of arachnids. The primary objectives of the Society are to encourage interest in arachnology in people of all ages and to generate, promote and disseminate arachnological knowledge and understanding by all suitable means. In particular, it works to foster co-operation between amateur and professional arachnologists. Actively involved in scientific aspects of arachnid conservation, it provides impartial information and expert advice on the ecology and biology of British arachnids to policy and decision makers in Government and non-governmental organisations (NGOs), as well as to conservation practitioners, private interests and the public. The Society oversees national recording schemes for spiders, harvestmen and pseudoscorpions. Founded in 1958, it is one of the oldest societies specializing in this animal group, publishing a journal (''Arachnology'') and a Newsletter three times ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sympatry
In biology, two related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter one another. An initially interbreeding population that splits into two or more distinct species sharing a common range exemplifies sympatric speciation. Such speciation may be a product of reproductive isolation – which prevents hybrid offspring from being viable or able to reproduce, thereby reducing gene flow – that results in genetic divergence. Sympatric speciation may, but need not, arise through secondary contact, which refers to speciation or divergence in allopatry followed by range expansions leading to an area of sympatry. Sympatric species or taxa in secondary contact may or may not interbreed. Types of populations Four main types of population pairs exist in nature. Sympatric populations (or species) contrast with parapatric populations, which contact one another in adjacent but not shared ranges and do not ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eugène Simon
Eugène Louis Simon (; 30 April 1848 – 17 November 1924) was a French naturalist who worked particularly on insects and spiders, but also on birds and plants. He is by far the most prolific spider taxonomist in history, describing over 4,000 species. Work on spiders His most significant work was ''Histoire Naturelle des Araignées'' (1892–1903), an encyclopedic treatment of the spider genera of the world. It was published in two volumes of more than 1000 pages each, and the same number of drawings by Simon. Working at the Muséum National d'Histoire Naturelle in Paris, it took Simon 11 years to complete, while working at the same time on devising a taxonomic scheme that embraced the known taxa. Simon described a total of 4,650 species, and as of 2013 about 3,790 species are still considered valid. The International Society of Arachnology offers a Simon Award recognising lifetime achievement. The Eocene fossil spider species '' Cenotextricella simoni'' was named in his ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philodromus Buxi
''Philodromus buxi'' is a spider species found from Europe to Kazakhstan. See also * List of Philodromidae species This page lists all described species of the spider family Philodromidae accepted by the World Spider Catalog : A ''Apollophanes'' ''Apollophanes (spider), Apollophanes'' O. Pickard-Cambridge, 1898 * ''Apollophanes aztecanus, A. aztecanus'' Don ... References External links buxi Invertebrates of Central Asia Spiders of Europe Spiders of Asia Spiders described in 1884 {{philodromidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philodromus Cespitum
''Philodromus cespitum'' is a species of running crab spider in the family ''Philodromidae.'' It is found in North America, Europe, North Africa, and parts of the Middle East and Asia. ''P. cespitum'' is a foliage-dweller, and is the most abundant species found in European fruit orchards. It acts as a Biological pest control, biological control by preying on orchard pests. ''P. cespitum'' is a Diurnality, diurnal ambush hunter and preys on Aphid, aphids, insects, and occasionally competitor spider species. Males court females by tapping on the females’ bodies with their forelegs. They then insert a genital plug into the female during copulation. Unlike in many other spider species, subsequent males can mate with plugged females by removing part of the plug prior to copulation. Males discriminate among females based on virginity and plug size, and can determine these factors using the females’ draglines and plug samples. Description Males of this species are approximately 3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philodromus Collinus
''Philodromus collinus'' is a species of spider found in Europe and Russia. See also * List of Philodromidae species This page lists all described species of the spider family Philodromidae accepted by the World Spider Catalog : A ''Apollophanes'' ''Apollophanes (spider), Apollophanes'' O. Pickard-Cambridge, 1898 * ''Apollophanes aztecanus, A. aztecanus'' Don ... References External links collinus Spiders of Europe Spiders of Russia Spiders described in 1835 {{philodromidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Philodromus Longipalpis
''Philodromus longipalpis'' is a spider species found in Europe, Iran and Azerbaijan. See also * List of Philodromidae species This page lists all described species of the spider family Philodromidae accepted by the World Spider Catalog : A ''Apollophanes'' ''Apollophanes (spider), Apollophanes'' O. Pickard-Cambridge, 1898 * ''Apollophanes aztecanus, A. aztecanus'' Don ... References External links longipalpis Spiders of Europe Spiders of Asia Fauna of Azerbaijan Fauna of Iran Spiders described in 1870 {{philodromidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
