|
Harpactea
''Harpactea'' is a genus of Dysderidae, woodlouse hunting spiders that was first described by W. S. Bristowe in 1939. They are non-web building predators that forage on the ground and on tree trunks at night, mainly in wiktionary:xerothermic, xerothermic forests. During the day, they hide in silk retreats they build under rocks or bark. ''Harpactea sadistica, H. sadistica'' was found to use traumatic insemination, the arthropod behavior of directly inserting its sperm into the body cavity of females. It is the first time it has ever been observed in spiders. ''H. hombergi'' is the only member of its genus that occurs in Great Britain. Description Like all Dysderidae, woodlouse hunters, ''Harpactea'' have six eyes. The type species, ''Harpactea hombergi, H. hombergi'', can grow up to a body length of . Males and females are similar, but the female has no epigyne. Like the rest of their family, they are nocturnal. Unlike them, ''Harpactea'' do not specialize on hunting woodlice. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpactea Hombergi
''Harpactea'' is a genus of Dysderidae, woodlouse hunting spiders that was first described by W. S. Bristowe in 1939. They are non-web building predators that forage on the ground and on tree trunks at night, mainly in wiktionary:xerothermic, xerothermic forests. During the day, they hide in silk retreats they build under rocks or bark. ''Harpactea sadistica, H. sadistica'' was found to use traumatic insemination, the arthropod behavior of directly inserting its sperm into the body cavity of females. It is the first time it has ever been observed in spiders. ''H. hombergi'' is the only member of its genus that occurs in Great Britain. Description Like all Dysderidae, woodlouse hunters, ''Harpactea'' have six eyes. The type species, ''Harpactea hombergi, H. hombergi'', can grow up to a body length of . Males and females are similar, but the female has no epigyne. Like the rest of their family, they are nocturnal. Unlike them, ''Harpactea'' do not specialize on hunting woodlice. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpactea Abantia
''Harpactea'' is a genus of woodlouse hunting spiders that was first described by W. S. Bristowe in 1939. They are non-web building predators that forage on the ground and on tree trunks at night, mainly in xerothermic forests. During the day, they hide in silk retreats they build under rocks or bark. '' H. sadistica'' was found to use traumatic insemination, the arthropod behavior of directly inserting its sperm into the body cavity of females. It is the first time it has ever been observed in spiders. ''H. hombergi'' is the only member of its genus that occurs in Great Britain. Description Like all woodlouse hunters, ''Harpactea'' have six eyes. The type species, '' H. hombergi'', can grow up to a body length of . Males and females are similar, but the female has no epigyne. Like the rest of their family, they are nocturnal. Unlike them, ''Harpactea'' do not specialize on hunting woodlice. ''H. rubicunda'' also hunts ''Drassodes'' and other spiders, but most ''Harpactea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpactea Albanica
''Harpactea'' is a genus of woodlouse hunting spiders that was first described by W. S. Bristowe in 1939. They are non-web building predators that forage on the ground and on tree trunks at night, mainly in xerothermic forests. During the day, they hide in silk retreats they build under rocks or bark. '' H. sadistica'' was found to use traumatic insemination, the arthropod behavior of directly inserting its sperm into the body cavity of females. It is the first time it has ever been observed in spiders. ''H. hombergi'' is the only member of its genus that occurs in Great Britain. Description Like all woodlouse hunters, ''Harpactea'' have six eyes. The type species, '' H. hombergi'', can grow up to a body length of . Males and females are similar, but the female has no epigyne. Like the rest of their family, they are nocturnal. Unlike them, ''Harpactea'' do not specialize on hunting woodlice. ''H. rubicunda'' also hunts ''Drassodes'' and other spiders, but most ''Harpactea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpactea Alanyana
''Harpactea'' is a genus of woodlouse hunting spiders that was first described by W. S. Bristowe in 1939. They are non-web building predators that forage on the ground and on tree trunks at night, mainly in xerothermic forests. During the day, they hide in silk retreats they build under rocks or bark. '' H. sadistica'' was found to use traumatic insemination, the arthropod behavior of directly inserting its sperm into the body cavity of females. It is the first time it has ever been observed in spiders. ''H. hombergi'' is the only member of its genus that occurs in Great Britain. Description Like all woodlouse hunters, ''Harpactea'' have six eyes. The type species, '' H. hombergi'', can grow up to a body length of . Males and females are similar, but the female has no epigyne. Like the rest of their family, they are nocturnal. Unlike them, ''Harpactea'' do not specialize on hunting woodlice. ''H. rubicunda'' also hunts ''Drassodes'' and other spiders, but most ''Harpactea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpactea Agnolettii
''Harpactea'' is a genus of woodlouse hunting spiders that was first described by W. S. Bristowe in 1939. They are non-web building predators that forage on the ground and on tree trunks at night, mainly in xerothermic forests. During the day, they hide in silk retreats they build under rocks or bark. '' H. sadistica'' was found to use traumatic insemination, the arthropod behavior of directly inserting its sperm into the body cavity of females. It is the first time it has ever been observed in spiders. ''H. hombergi'' is the only member of its genus that occurs in Great Britain. Description Like all woodlouse hunters, ''Harpactea'' have six eyes. The type species, '' H. hombergi'', can grow up to a body length of . Males and females are similar, but the female has no epigyne. Like the rest of their family, they are nocturnal. Unlike them, ''Harpactea'' do not specialize on hunting woodlice. ''H. rubicunda'' also hunts ''Drassodes'' and other spiders, but most ''Harpactea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpactea Aeoliensis
''Harpactea'' is a genus of woodlouse hunting spiders that was first described by W. S. Bristowe in 1939. They are non-web building predators that forage on the ground and on tree trunks at night, mainly in xerothermic forests. During the day, they hide in silk retreats they build under rocks or bark. '' H. sadistica'' was found to use traumatic insemination, the arthropod behavior of directly inserting its sperm into the body cavity of females. It is the first time it has ever been observed in spiders. ''H. hombergi'' is the only member of its genus that occurs in Great Britain. Description Like all woodlouse hunters, ''Harpactea'' have six eyes. The type species, '' H. hombergi'', can grow up to a body length of . Males and females are similar, but the female has no epigyne. Like the rest of their family, they are nocturnal. Unlike them, ''Harpactea'' do not specialize on hunting woodlice. ''H. rubicunda'' also hunts ''Drassodes'' and other spiders, but most ''Harpactea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpactea Acuta
''Harpactea'' is a genus of woodlouse hunting spiders that was first described by W. S. Bristowe in 1939. They are non-web building predators that forage on the ground and on tree trunks at night, mainly in xerothermic forests. During the day, they hide in silk retreats they build under rocks or bark. '' H. sadistica'' was found to use traumatic insemination, the arthropod behavior of directly inserting its sperm into the body cavity of females. It is the first time it has ever been observed in spiders. ''H. hombergi'' is the only member of its genus that occurs in Great Britain. Description Like all woodlouse hunters, ''Harpactea'' have six eyes. The type species, '' H. hombergi'', can grow up to a body length of . Males and females are similar, but the female has no epigyne. Like the rest of their family, they are nocturnal. Unlike them, ''Harpactea'' do not specialize on hunting woodlice. ''H. rubicunda'' also hunts ''Drassodes'' and other spiders, but most ''Harpactea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpactea Achsuensis
''Harpactea'' is a genus of woodlouse hunting spiders that was first described by W. S. Bristowe in 1939. They are non-web building predators that forage on the ground and on tree trunks at night, mainly in xerothermic forests. During the day, they hide in silk retreats they build under rocks or bark. '' H. sadistica'' was found to use traumatic insemination, the arthropod behavior of directly inserting its sperm into the body cavity of females. It is the first time it has ever been observed in spiders. ''H. hombergi'' is the only member of its genus that occurs in Great Britain. Description Like all woodlouse hunters, ''Harpactea'' have six eyes. The type species, '' H. hombergi'', can grow up to a body length of . Males and females are similar, but the female has no epigyne. Like the rest of their family, they are nocturnal. Unlike them, ''Harpactea'' do not specialize on hunting woodlice. ''H. rubicunda'' also hunts ''Drassodes'' and other spiders, but most ''Harpactea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpactea Alexandrae
''Harpactea'' is a genus of woodlouse hunting spiders that was first described by W. S. Bristowe in 1939. They are non-web building predators that forage on the ground and on tree trunks at night, mainly in xerothermic forests. During the day, they hide in silk retreats they build under rocks or bark. '' H. sadistica'' was found to use traumatic insemination, the arthropod behavior of directly inserting its sperm into the body cavity of females. It is the first time it has ever been observed in spiders. ''H. hombergi'' is the only member of its genus that occurs in Great Britain. Description Like all woodlouse hunters, ''Harpactea'' have six eyes. The type species, '' H. hombergi'', can grow up to a body length of . Males and females are similar, but the female has no epigyne. Like the rest of their family, they are nocturnal. Unlike them, ''Harpactea'' do not specialize on hunting woodlice. ''H. rubicunda'' also hunts ''Drassodes'' and other spiders, but most ''Harpactea'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harpactea Sadistica
''Harpactea sadistica'' is a species of dysderine spider, found only in Israel. It was first described in 2008. Description Both sexes have the same body characteristics. The length of the pale yellow-brown, smooth carapace ranges from 1.1 to 1.7 mm. The legs are pale yellow, with the first two pairs darker than the other two. The cylindrical, whitish opisthosoma is 2.3 mm long in the holotype specimen. The tip of the embolus of the male resembles the tip of a hypodermic needle, and the vulva of the female is atrophied.Rezac 2008 Ecology ''Harpactea sadistica'' probably exhibits an annual lifecycle. Eggs are laid from March to April. The species is found in woodlands dominated by ''Quercus calliprinos'' and pine plantations, and in steppe habitats where ''Asphodelus'' is predominant. Traumatic insemination ''Harpactea sadistica'' is the first spider species – and the first member of the entire subphylum Chelicerata – found to use traumatic insemination. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Traumatic Insemination
Traumatic insemination, also known as hypodermic insemination, is the mating practice in some species of invertebrates in which the male pierces the female's abdomen with his aedeagus and injects his sperm through the wound into her abdominal cavity (hemocoel). The sperm diffuse through the female's hemolymph, reaching the ovaries and resulting in fertilization. The process is detrimental to the female's health. It creates an open wound which impairs the female until it heals, and is susceptible to infection. The injection of sperm and ejaculatory fluids into the hemocoel can also trigger an immune reaction in the female. Bed bugs, which reproduce solely by traumatic insemination, have evolved a pair of sperm-receptacles, known as the spermalege. It has been suggested that the spermalege reduces the direct damage to the female bed bug during traumatic insemination. However experiments found no conclusive evidence for that hypothesis; as of 2003, the preferred explanation for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dysderidae
Dysderidae, also known as woodlouse hunters, sowbug-eating spiders, and cell spiders, is a family of araneomorph spiders first described by Carl Ludwig Koch in 1837. They are found primarily in Eurasia, extending into North Africa with very few species occurring in South America. ''Dysdera crocata'' is introduced into many regions of the world. Dysderids have six eyes, and are haplogyne, i.e. the females lack a sclerotized epigyne. There is a substantial number of genera, but two of them, ''Dysdera'' and ''Harpactea'', account for a very large number of the species and are widespread across the family's range. One species, ''Dysdera crocata'' (the woodlouse hunter), has been transported over much of the planet together with its preferred foods—woodlice. ''Dysdera'' also feeds on beetles. These spiders have very large chelicerae, which they use to pierce the armored bodies of woodlice and beetles. There are also some reports that they have a mildly toxic venom that can cause lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
