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Theridiidae
Theridiidae, also known as the tangle-web spiders, cobweb spiders and comb-footed spiders, is a large family of Araneomorphae, araneomorph spiders first described by Carl Jakob Sundevall in 1833. This diverse, globally distributed family includes over 3,000 species in 124 genus, genera, and is the most common arthropod found in human dwellings throughout the world. Theridiid spiders are both Entelegynae, entelegyne, meaning that the females have a genital plate, and Cribellum, ecribellate, meaning that they spin sticky capture silk instead of woolly silk. They have a comb of serrated bristles (setae) on the Arthropod leg, tarsus of the fourth leg. The family includes some model organisms for research, including the List of medically significant spider bites, medically important Latrodectus, widow spiders. They are important to studies characterizing their venom and its clinical manifestation, but widow spiders are also used in research on spider silk and sexual biology, including ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridion Grallator
''Theridion grallator'', also known as the Hawaiian happy-face spider, is a spider in the Family (biology), family Theridiidae that resides on the Hawaiian Islands. ''T. grallator'' gets its vernacular name of "Hawaiian happy-face spider" from the unique patterns superimposed on its abdomen, specifically those that resemble a human Smiley, smiling face. ''T. grallator'' is particularly notable because of its wide range of Polymorphism (biology), polymorphisms that may be studied to allow a better understanding of evolutionary mechanisms. In addition to the variety of color polymorphisms present, ''T. grallator'' demonstrates the interesting quality of diet-induced color change, in which its appearance temporarily changes as it metabolizes various food items. Description ''T. grallator'' is a small spider with a body size less than 5 millimeters long. It has characteristically long and slender legs and a translucent yellow body. These distinctly long legs lead ''T. grallator'' t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argyrodes
''Argyrodes'', also called dewdrop spiders, is a genus of comb-footed spiders that was first described by Eugène Louis Simon in 1864. They occur worldwide, and are best known for their kleptoparasitism. They can spin their own webs, but tend to invade and reside in their hosts' webs. This relationship can be commensal or even mutual if the dewdrop spider feeds on small trapped insects that are not eaten by the host.Tso 2000 Some species can even prey upon the host.Guarisco 1999 The genus name is a combination of the Ancient Greek " argyros" (), meaning "silver", and the suffix "-odes", meaning "like". Description Most species are relatively small, and many are black with silvery markings. '' A. incursus'' has a body length of , while '' A. fissifrons'' has a body length of about . The body has a characteristic conical or triangle shape with a shorter third pair of legs, common in web dwelling spiders. The silver coloration of ''Argyrodes'' may be able to attract moths and oth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Theridiidae Species
This page lists all described genera and species of the spider family Theridiidae. , the World Spider Catalog accepts 3028 species in 124 genera: A ''Achaearanea'' ''Achaearanea'' Strand, 1929 * ''Achaearanea alboinsignita'' Locket, 1980 — Comoros * ''Achaearanea baltoformis'' Yin & Peng, 2012 — China * ''Achaearanea biarclata'' Yin & Bao, 2012 — China * ''Achaearanea budana'' Tikader, 1970 — India * ''Achaearanea coilioducta'' Yin, 2012 — China * ''Achaearanea diglipuriensis'' Tikader, 1977 — India (Andaman Is.) * ''Achaearanea disparata'' Denis, 1965 — Gabon, Côte d'Ivoire * '' Achaearanea diversipes'' (Rainbow, 1920) — Australia (Norfolk Is., Lord Howe Is.) * '' Achaearanea dubitabilis'' Wunderlich, 1987 — Canary Is. * ''Achaearanea durgae'' Tikader, 1970 — India * '' Achaearanea epicosma'' (Rainbow, 1920) — Australia (Lord Howe Is.) * ''Achaearanea extumida'' Xing, Gao & Zhu, 1994 — China * '' Achaearanea flavomaculata'' Yin, 2012 — China * '' Ach ... [...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] |
Neospintharus
''Neospintharus'' is a genus of comb-footed spiders that was first described by H. Exline in 1950. It was synonymized with ''Argyrodes'' in 1962, but revalidated in 2004. Species it contains thirteen species, found in the Caribbean, South America, Central America, Asia, Mexico, Turkey, the United States, and Canada: *'' Neospintharus baboquivari'' (Exline & Levi, 1962) – USA, Mexico *'' Neospintharus baekamensis'' Seo, 2010 – Korea *'' Neospintharus bicornis'' ( O. Pickard-Cambridge, 1880) – Brazil *'' Neospintharus concisus'' (Exline & Levi, 1962) – Mexico *'' Neospintharus fur'' (Bösenberg & Strand, 1906) – China, Korea, Japan *'' Neospintharus furcatus'' (O. Pickard-Cambridge, 1894) – USA to El Salvador, Caribbean *'' Neospintharus nipponicus'' (Kumada, 1990) – China, Korea, Japan *'' Neospintharus obscurus'' ( Keyserling, 1884) – Peru *'' Neospintharus parvus'' Exline, 1950 ( type) – Panama to Ecuador *'' Neospintharus rioensis'' (Exline & Levi, 1962) – B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latrodectus
''Latrodectus'' is a broadly distributed genus of spiders with several species that are commonly known as the true widows. This group is composed of those often loosely called black widow spiders, brown widow spiders, and similar spiders. However, the diversity of species is much greater. A member of the family Theridiidae, this genus contains 34 species, which include several North American "black widows" (southern black widow ''Latrodectus mactans'', western black widow ''Latrodectus hesperus'', and northern black widow ''Latrodectus variolus''). Besides these, North America also has the red widow ''Latrodectus bishopi'' and the brown widow ''Latrodectus geometricus'', which, in addition to North America, has a much wider geographic distribution. Elsewhere, others include the European black widow (''Latrodectus tredecimguttatus''), the Australian redback black widow (''Latrodectus hasseltii'') and the closely related New Zealand katipō (''Latrodectus katipo''), several differ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faiditus
''Faiditus'' is a genus of comb-footed spiders that was first described by Eugen von Keyserling in 1884. Species it contains fifty-nine species, all found in the Americas except for ''F. xiphias'', found in"Asia: *'' F. acuminatus'' (Keyserling, 1891) – Brazil, Argentina *'' F. affinis'' ( O. Pickard-Cambridge, 1880) – Brazil *'' F. alticeps'' (Keyserling, 1891) – Brazil, Paraguay *'' F. altus'' (Keyserling, 1891) – Venezuela, Brazil *'' F. amates'' (Exline & Levi, 1962) – Mexico, Guatemala *'' F. americanus'' ( Taczanowski, 1874) – USA to Brazil, Argentina *'' F. amplifrons'' (O. Pickard-Cambridge, 1880) – Panama to Argentina *'' F. analiae'' (González & Carmen, 1996) – Brazil *'' F. arthuri'' (Exline & Levi, 1962) – Panama *'' F. atopus'' (Chamberlin & Ivie, 1936) – Panama to Ecuador *'' F. bryantae'' (Exline & Levi, 1962) – Costa Rica, Panama *'' F. cancellatus'' ( Hentz, 1850) – USA, Canada, Bahama Is. *'' F. caronae'' (González & Carmen, 1996) – ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Achaearanea
''Achaearanea'' is a genus of comb-footed spiders that was first described by Embrik Strand in 1929. It used to include the extremely abundant common house spider, which was transferred to genus '' Parasteatoda'' in 2006, together with many other species. '' A. veruculata'' and many more species were moved to genus '' Cryptachaea'' in 2008. Others were moved to the revived '' Henziectypus''. The genus was thus reduced from about 150 species to about 22 species during major revisions. Possibly even more species should be transferred to other genera. Description This genus includes small and large theridiids. The legs are medium long, with spines and usually many hairs. Their web is an irregular network of threads, usually in a sheltered place. Distribution Species are found around the world, with several species from South America, China and Korea, India, Australia and Africa. Some species are endemic to several small islands. Species it contains twenty-eight species, found i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anelosimus
''Anelosimus'' is a cosmopolitan genus of cobweb spiders (Theridiidae), currently containing 74 species. ''Anelosimus'' is a key group in the study of sociality and its evolution in spiders (Aviles 1997). It contains species spanning the spectrum from solitary to highly social (quasisocial), with eight quasisocial species, far more than any other spider genus. Among these is the South American social species ''Anelosimus eximius'', among the best studied social spider species. The web of a colony of ''A. eximius'' can reach cover entire tree canopies and contain tens of thousands of individuals. Most of the highly social species live in lowland tropical forests, and all occur in the Americas. Other species, particularly those at higher altitudes in northern latitudes in the Americas and all non-American species appear to be solitary or sub-social. Social ''Anelosimus'' species are generally highly inbred and have female-biased sex ratios, with up to 10 females per male. The soci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enoplognatha Ovata
''Enoplognatha ovata'', the common candy-striped spider, is a species of spider belonging to the family Theridiidae. It is native to Europe and has also been introduced to North America. It is notably found in Lithuania.The checklist of Lithuanian spiders (Arachnida: Araneae). Marija Biteniekytė and Vygandas Rėlys, Biologija, 2011, Vol. 57, No. 4, pages 148–158, This spider, reaching a length of 6 mm (excluding legs), has translucent legs and the globular abdomen is extremely variable in colour and pattern: the background colour is white, cream or green and can be marked with a row of dark spots, a broad red stripe or with two red stripes in a v-shape. Despite its small size, this is a formidable predator which can prey on insects many times its size. The female deposits its eggs in a white sac and after several days the sac gradually changes colour to a blue/grey. This is secreted within a rolled-up leaf fastened with silk Silk is a natural protein fiber, some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spider Web
A spider web, spiderweb, spider's web, or cobweb (from the archaic word '' coppe'', meaning "spider") is a structure created by a spider out of proteinaceous spider silk extruded from its spinnerets, generally meant to catch its prey. Spider webs have existed for at least 100 million years, as witnessed in a rare find of Early Cretaceous amber from Sussex, in southern England. Many spiders build webs specifically to trap and catch insects to eat. However, not all spiders catch their prey in webs, and some do not build webs at all. "Spider web" is typically used to refer to a web that is apparently still in use (i.e. clean), whereas "cobweb" refers to abandoned (i.e. dusty) webs. However, the word "cobweb" is also used by biologists to describe the tangled three-dimensional web of some spiders of the family Theridiidae. While this large family is known as the cobweb spiders, they actually have a huge range of web architectures; other names for this spider family include tangl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spider Web
A spider web, spiderweb, spider's web, or cobweb (from the archaic word '' coppe'', meaning "spider") is a structure created by a spider out of proteinaceous spider silk extruded from its spinnerets, generally meant to catch its prey. Spider webs have existed for at least 100 million years, as witnessed in a rare find of Early Cretaceous amber from Sussex, in southern England. Many spiders build webs specifically to trap and catch insects to eat. However, not all spiders catch their prey in webs, and some do not build webs at all. "Spider web" is typically used to refer to a web that is apparently still in use (i.e. clean), whereas "cobweb" refers to abandoned (i.e. dusty) webs. However, the word "cobweb" is also used by biologists to describe the tangled three-dimensional web of some spiders of the family Theridiidae. While this large family is known as the cobweb spiders, they actually have a huge range of web architectures; other names for this spider family include tangl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
