Chamberlin & Ivie, 1934
| T. sisyphoides (Walckenaer, 1841)|
24, see text
Tidarren is a genus of tangle-web spiders first described by Ralph Vary Chamberlin & Wilton Ivie in 1934.
A genus is a taxonomic rank used in the biological classification of living and fossil organisms, as well as viruses, in biology. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus.
Theridiidae, also known as the tangle-web spiders, cobweb spiders and comb-footed spiders, is a large family of araneomorph spiders first described by Carl Jakob Sundevall in 1833. This diverse, globally distributed family includes over 3,000 species in 124 genera, and is the most common arthropods found in human dwellings throughout the world.
Ralph Vary Chamberlin was an American biologist, ethnographer, and historian from Salt Lake City, Utah. He was a faculty member of the University of Utah for over 25 years, where he helped establish the School of Medicine and served as its first dean, and later became head of the zoology department. He also taught at Brigham Young University and the University of Pennsylvania, and worked for over a decade at the Museum of Comparative Zoology at Harvard University, where he described species from around the world.
Males are much smaller than females, and they amputate one of their palps before maturation, entering their adult life with only one palp.Though it is uncertain why they do this, it may be done to increase mobility, as the palps are disproportionately large compared to the size of the body. It may also be done because only one palp is needed.
Females of the Yemeni species T. argo tear off the single remaining palp before feeding on males. The palp remains attached to the female's epigynum for about four hours, continuing to function despite being separated from the male's body.
Yemen, officially the Republic of Yemen, is a country at the southern end of the Arabian Peninsula in Western Asia. It is the second-largest Arab sovereign state in the peninsula, occupying 527,970 square kilometres. The coastline stretches for about 2,000 kilometres. It is bordered by Saudi Arabia to the north, the Red Sea to the west, the Gulf of Aden and Guardafui Channel to the south, and the Arabian Sea and Oman to the east. Yemen's territory encompasses more than 200 islands, including Socotra, one of the largest islands in the Middle East. Yemen is a member of the Arab League, United Nations, Non-Aligned Movement and the Organisation of Islamic Cooperation.
Tidarren argo is a spider from Yemen. The species is remarkable by its male amputating one of its palps before maturation and entering his adult life with one palp only. It adopts exceptional copulatory behaviour: when the male achieves genitalia coupling with his palp, the latter is torn off by the female. The separated gonopod remains attached to the female's epigynum for approximately 4 hours and continues to function independently, serving as a mating plug. While this happens, the female feeds on the male. Emasculation thus synchronizes sexual cannibalism and sperm transfer, lengthening the interval between copulations. This mating behaviour might allow for the continuation of insemination by the dismembered palp.
As of April 2019 [update] it contains twenty-four species:
Tidarren haemorrhoidale is a species of cobweb spider in the family Theridiidae. It is found in a range from the United States to Argentina.
Tidarren sisyphoides is a spider of the family Theridiidae.
Agelenopsis, commonly known as the American grass spiders, is genus of funnel weavers first described by C. G. Giebel in 1869. They weave sheet webs that have a funnel shelter on one edge. The web is not sticky, but these spiders make up for that shortcoming by running very rapidly. The larger specimens can grow to about 19 mm in body length. They may be recognized by the arrangement of their eight eyes into three rows. The top row has two eyes, the middle row has four eyes, and the bottom row has two eyes. They have two prominent hind spinnerets, somewhat indistinct bands on their legs, and two dark bands running down either side of the cephalothorax.
The Agelenidae are a large family of spiders in the suborder Araneomorphae. Well-known examples include the common "grass spiders" of the genus Agelenopsis. Nearly all Agelenidae are harmless to humans, but the bite of the hobo spider may be medically significant, and some evidence suggests it might cause necrotic lesions. However, the matter remains subject to debate. The most widely accepted common name for members of the family is funnel weaver.
Orb-weaver spiders or araneids are members of the spider family Araneidae. They are the most common group of builders of spiral wheel-shaped webs often found in gardens, fields and forests. "Orb" can in English mean "circular", hence the English name of the group. Araneids have eight similar eyes, hairy or spiny legs, and no stridulating organs.
Oonopidae, also known as is a goblin spiders, is a family of spiders consisting of over 1,600 described species in about 113 genera worldwide, with total species diversity estimated at 2000 to 2500 species. The type genus of the family is OonopsKeyserling, 1835.
Linyphiidae is a family of very small spiders, including more than 4,300 described species in 601 genera worldwide. This makes Linyphiidae the second largest family of spiders after the Salticidae. New species are still being discovered throughout the world, and the family is poorly known. Because of the difficulty in identifying such tiny spiders, there are regular changes in taxonomy as species are combined or divided.
Menemerus is a genus of jumping spiders that was first described by Eugène Louis Simon in 1868. They are 4 to 10 millimetres long, flattened in shape, and very hairy, usually with brown and grayish hairs. Most species have white edges on the thorax. The abdomen is often oval, or sometimes elongated or rounded.
The Dendryphantina are a subtribe of jumping spiders that occur mainly in the New World. The subtribe was first defined by Anton Menge in 1879 as Dendryphantidae. Females of the subtribe generally show paired spots on the abdomen, and the males often have enlarged chelicerae. Females in this subtribe typically have S-shaped epigynal openings.
Scytodes is a genus of spitting spider that occurs all around the world. The most widely distributed species is Scytodes thoracica, which originally had a palearctic distribution, but has been introduced to North America, Argentina, India, Australia and New Zealand. It was first described by Pierre André Latreille in 1804.
Hogna is a genus of wolf spiders with more than 200 described species. It is found on all continents except Antarctica.
Microlinyphia is a genus of dwarf spiders that was first described by U. Gerhardt in 1928.
Thomisus is a genus of crab spiders with almost 150 species described. The genus includes species that vary widely in their ecology, but the best known crab spiders are those species that people call the flower crab spiders, because they are ambush predators that feed on insects visiting flowers. The flower crab spiders are the species for which the popular name was coined, because of their crab-like motion and their way of holding their front legs in an attitude reminiscent of a crab spreading its claws as a threat.
Ero is a genus of pirate spiders first described in 1836. They resemble comb-footed spiders due to their globular abdomen, which is higher than it is long.
Orchestina is a spider genus in the family Oonopidae. There are 71 accepted species in the genus.
Agyneta is a genus of dwarf spiders that was first described by J. E. Hull in 1911.
Robertus is a genus of spider in the family Theridiidae.
Ceratinopsis is a genus of dwarf spiders that was first described by James Henry Emerton in 1882.
"Tidarren" at the Encyclopedia of Life
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