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Epigyne
The epigyne or epigynum is the external genital structure of female spiders. As the epigyne varies greatly in form in different species, even in closely related ones, it often provides the most distinctive characteristic for recognizing species. It consists of a small, hardened portion of the exoskeleton located on the underside of the abdomen, in front of the epigastric furrow and between the epigastric plates. Functions The primary function of the epigyne is to receive and direct the palpal organ of the male during copulation. The various specific forms of epigynes are correlated, in each case, with corresponding specific differences in the palpus of the male. This specialization prevents individuals of different species from mating. The epigyne covers or accompanies the openings of the spermathecae, which are pouches for receiving and retaining sperm. Frequently, the openings of the spermathecae are on the outer face of the epigyne and can be easily seen. A secondary functi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epigastric Furrow
The anatomy of spiders includes many characteristics shared with other arachnids. These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically shed. Spiders also have several adaptations that distinguish them from other arachnids. All spiders are capable of producing silk of various types, which many species use to build webs to ensnare prey. Most spiders possess venom, which is injected into prey (or defensively, when the spider feels threatened) through the fangs of the chelicerae. Male spiders have specialized pedipalps that are used to transfer sperm to the female during mating. Many species of spiders exhibit a great deal of sexual dimorphism. External anatomy Spiders, unlike insects, have only two main body parts ( tagmata) instead of three: a fused head and thorax (called a cephalothorax or prosoma) and an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epigastric Plates
The anatomy of spiders includes many characteristics shared with other arachnids. These characteristics include bodies divided into two tagmata (sections or segments), eight jointed legs, no wings or antennae, the presence of chelicerae and pedipalps, simple eyes, and an exoskeleton, which is periodically shed. Spiders also have several adaptations that distinguish them from other arachnids. All spiders are capable of producing silk of various types, which many species use to build webs to ensnare prey. Most spiders possess venom, which is injected into prey (or defensively, when the spider feels threatened) through the fangs of the chelicerae. Male spiders have specialized pedipalps that are used to transfer sperm to the female during mating. Many species of spiders exhibit a great deal of sexual dimorphism. External anatomy Spiders, unlike insects, have only two main body parts ( tagmata) instead of three: a fused head and thorax (called a cephalothorax or prosoma) and an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spider External Anatomy En
Spiders ( order Araneae) are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every land habitat. , 50,356 spider species in 132 families have been recorded by taxonomists. However, there has been debate among scientists about how families should be classified, with over 20 different classifications proposed since 1900. Anatomically, spiders (as with all arachnids) differ from other arthropods in that the usual body segments are fused into two tagmata, the cephalothorax or prosoma, and the opisthosoma, or abdomen, and joined by a small, cylindrical pedicel, however, as there is currently neither paleontological nor embryological evidence that spiders ever had a separate t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araneus
''Araneus'' is a genus of common orb-weaving spiders. It includes about 650 species, among which are the European garden spider and the barn spider. The genus was erected by Carl Alexander Clerck in 1757. Description Spiders of this genus present perhaps the most obvious case of sexual dimorphism among all of the orb-weaver family, with males being normally to the size of females. In ''A. diadematus'', for example, last-molt females can reach the body size up to 1 in (2.5 cm), while most males seldom grow over 0.3 in (1 cm), both excluding leg span. Males are differentiated from females by a much smaller and more elongated abdomen, longer legs, and the inability to catch or consume prey bigger than themselves. In females, the epigyne has a long scape (a tongue-like appendage). Male pedipalps have a hook-like terminal apophysis. Abdominal tubercles are present anterolaterally. Taxonomic history ''Araneus'' was, for much of its history, called ''Epeira''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spider
Spiders ( order Araneae) are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every land habitat. , 50,356 spider species in 132 families have been recorded by taxonomists. However, there has been debate among scientists about how families should be classified, with over 20 different classifications proposed since 1900. Anatomically, spiders (as with all arachnids) differ from other arthropods in that the usual body segments are fused into two tagmata, the cephalothorax or prosoma, and the opisthosoma, or abdomen, and joined by a small, cylindrical pedicel, however, as there is currently neither paleontological nor embryological evidence that spiders ever had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridula Emertoni
''Theridula emertoni'' is a species of tangle web spider commonly found in the United States and Canada. Prior to its formal description in 1954, specimens of ''T. emertoni'' were often classified as '' T. opulenta'', a species with whom its range overlaps. The species can be reliably distinguished from ''T. opulenta'' by the epigyne in females or by the pedipalp Pedipalps (commonly shortened to palps or palpi) are the second pair of appendages of chelicerates – a group of arthropods including spiders, scorpions, horseshoe crabs, and sea spiders. The pedipalps are lateral to the chelicerae ("jaws") and ... in males. Adult females are between 1.7 and 2.8 mm in length. Adult males are between 1.6 and 2.3 mm in length. References External links ''Theridula emertoni''at Bugguide.net emertoni Spiders of North America Spiders described in 1954 {{Theridiidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spider Internal Anatomy-en
Spiders ( order Araneae) are air-breathing arthropods that have eight legs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms. Spiders are found worldwide on every continent except for Antarctica, and have become established in nearly every land habitat. , 50,356 spider species in 132 families have been recorded by taxonomists. However, there has been debate among scientists about how families should be classified, with over 20 different classifications proposed since 1900. Anatomically, spiders (as with all arachnids) differ from other arthropods in that the usual body segments are fused into two tagmata, the cephalothorax or prosoma, and the opisthosoma, or abdomen, and joined by a small, cylindrical pedicel, however, as there is currently neither paleontological nor embryological evidence that spiders ever had a separate t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araneus Diadematus
The spider species ''Araneus diadematus'' is commonly called the European garden spider, diadem spider, orangie, cross spider, and crowned orb weaver. It is sometimes called the pumpkin spider, although this name is also used for a different species, ''Araneus marmoreus''. It is an orb-weaver spider found in Europe, where it is native, and North America, where it is introduced. Range ''A. diadematus'' has a holarctic distribution throughout Europe and across North America, from southern Canada to Mexico, and from British Columbia to Newfoundland (island), Newfoundland.Cross Spider Washington NatureMapping Project Size and markings [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isopeda Villosa
''Isopeda villosa'' is a species of huntsman spider native to New South Wales, Australia, and established in Auckland, New Zealand. It was first described by Ludwig Carl Christian Koch Ludwig Carl Christian Koch (8 November 1825 – 1 November 1908) was a German entomologist and arachnologist. He was born in Regensburg, Germany, and died in Nuremberg, Germany. He studied in Nuremberg, initially law, but then turned to medic ... in 1875. Gallery References Sparassidae Fauna of New South Wales Spiders of Australia Spiders described in 1875 {{sparassidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isopeda
''Isopeda'' is a genus of huntsman spiders that was first described by Ludwig Carl Christian Koch in 1875. Species it contains nineteen species and one subspecies, found in Papua New Guinea, Australia, the Philippines, and on New Caledonia: *'' Isopeda alpina'' Hirst, 1992 – Australia (New South Wales, Victoria) *'' Isopeda binnaburra'' Hirst, 1992 – Australia (Queensland) *'' Isopeda brachyseta'' Hirst, 1992 – Australia (New South Wales) *'' Isopeda canberrana'' Hirst, 1992 – Australia (New South Wales, Victoria) *'' Isopeda catmona'' Barrion & Litsinger, 1995 – Philippines *'' Isopeda deianira'' ( Thorell, 1881) – New Guinea *'' Isopeda echuca'' Hirst, 1992 – Australia (New South Wales, Victoria) *'' Isopeda girraween'' Hirst, 1992 – Australia (Queensland) *'' Isopeda leishmanni'' Hogg, 1903 – Australia (Western Australia, South Australia, Victoria) **'' Isopeda l. hoggi'' Simon, 1908 – Australia (Western Australia) *'' Isopeda magna'' Hirst, 1992 – Austr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phidippus Clarus
Phidippus Clarus, also known as the Brilliant Jumping Spider, is a species of jumping spider (family Salticidae) found in old fields throughout eastern North America. It often waits upside down near the top of a plant, which may be useful for detecting prey, and then quickly jumps down before the prey can escape. The spider is one of 60 species in the genus ''Phidippus'', and one of about 5,000 in the Salticidae, a family that accounts for about 10% of all spider species. ''P. clarus'' is a predator, mostly consuming insects, other spiders, and other terrestrial arthropods. ''P. clarus'' is a relatively large salticid that is able to take prey up to the size of an adult earwig. In an experiment, ''P. clarus'' was offered as many fruit flies as it could eat in a four-hour session. On average individuals took 17 flies, with the maximum amount taken was a striking 41. When ''P. clarus'' males compete for females, the winners are those that produce the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colonus Puerperus
''Colonus puerperus'' is a species of jumping spider commonly found in the eastern United States. Its range stretches along the Gulf Coast from Florida to Texas, and north to Kansas, Illinois, and Pennsylvania Pennsylvania (; ( Pennsylvania Dutch: )), officially the Commonwealth of Pennsylvania, is a state spanning the Mid-Atlantic, Northeastern, Appalachian, and Great Lakes regions of the United States. It borders Delaware to its southeast, .... It is usually found in grassy areas during the warmer months of the year. Adult females are between 7 and 11 mm (0.3–0.4 in) in length. Adult males are between 5 and 7 mm (0.2–0.3 in). The species name is from Latin ', "just having born a child" (from ', child, and ', give birth). References External links *''Colonus puerperus''at Bugguide.net Salticidae Spiders of the United States Spiders described in 1846 {{salticidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
