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Theridiosoma
''Theridiosoma'' is a genus of ray spiders that was first described by Octavius Pickard-Cambridge in 1879. They use their web as a high speed slingshot to actively hunt for prey. Description Mature spiders in this genus have a body length of 0.5–2.5 mm. The carapace ranges from dark brown to light tan, sometimes with distinct markings around the eye region or fovea, The sternum is smooth, with sparse bristles, and is usually darker towards the margin. A pit organ is present on the anterior margin of the sternum, at both corners. The abdomen is ovoid in shape, and taller than wide or long; the dorsal side of the abdomen often bears a light, thin median band and/or symmetrical light spots, the ventral side is dark. The metatarsi of the legs are typically shorter than the tibiae. As with other spiders in the family, the tibiae of the 3rd and 4th legs bear a group of long, vibration-sensitive trichobothria. Species in this genus exhibit only slight sexual dimorphism; males a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiosoma Davisi
''Theridiosoma'' is a genus of ray spiders that was first described by Octavius Pickard-Cambridge in 1879. They use their web as a high speed slingshot to actively hunt for prey. Description Mature spiders in this genus have a body length of 0.5–2.5 mm. The carapace ranges from dark brown to light tan, sometimes with distinct markings around the eye region or fovea, The sternum is smooth, with sparse bristles, and is usually darker towards the margin. A pit organ is present on the anterior margin of the sternum, at both corners. The abdomen is ovoid in shape, and taller than wide or long; the dorsal side of the abdomen often bears a light, thin median band and/or symmetrical light spots, the ventral side is dark. The metatarsi of the legs are typically shorter than the tibiae. As with other spiders in the family, the tibiae of the 3rd and 4th legs bear a group of long, vibration-sensitive trichobothria. Species in this genus exhibit only slight sexual dimorphism; males ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiosoma Ankas
''Theridiosoma'' is a genus of ray spiders that was first described by Octavius Pickard-Cambridge in 1879. They use their web as a high speed slingshot to actively hunt for prey. Description Mature spiders in this genus have a body length of 0.5–2.5 mm. The carapace ranges from dark brown to light tan, sometimes with distinct markings around the eye region or fovea, The sternum is smooth, with sparse bristles, and is usually darker towards the margin. A pit organ is present on the anterior margin of the sternum, at both corners. The abdomen is ovoid in shape, and taller than wide or long; the dorsal side of the abdomen often bears a light, thin median band and/or symmetrical light spots, the ventral side is dark. The metatarsi of the legs are typically shorter than the tibiae. As with other spiders in the family, the tibiae of the 3rd and 4th legs bear a group of long, vibration-sensitive trichobothria. Species in this genus exhibit only slight sexual dimorphism; males ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiosoma Concolor
''Theridiosoma'' is a genus of ray spiders that was first described by Octavius Pickard-Cambridge in 1879. They use their web as a high speed slingshot to actively hunt for prey. Description Mature spiders in this genus have a body length of 0.5–2.5 mm. The carapace ranges from dark brown to light tan, sometimes with distinct markings around the eye region or fovea, The sternum is smooth, with sparse bristles, and is usually darker towards the margin. A pit organ is present on the anterior margin of the sternum, at both corners. The abdomen is ovoid in shape, and taller than wide or long; the dorsal side of the abdomen often bears a light, thin median band and/or symmetrical light spots, the ventral side is dark. The metatarsi of the legs are typically shorter than the tibiae. As with other spiders in the family, the tibiae of the 3rd and 4th legs bear a group of long, vibration-sensitive trichobothria. Species in this genus exhibit only slight sexual dimorphism; males a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiosoma Circuloargenteum
''Theridiosoma'' is a genus of ray spiders that was first described by Octavius Pickard-Cambridge in 1879. They use their web as a high speed slingshot to actively hunt for prey. Description Mature spiders in this genus have a body length of 0.5–2.5 mm. The carapace ranges from dark brown to light tan, sometimes with distinct markings around the eye region or fovea, The sternum is smooth, with sparse bristles, and is usually darker towards the margin. A pit organ is present on the anterior margin of the sternum, at both corners. The abdomen is ovoid in shape, and taller than wide or long; the dorsal side of the abdomen often bears a light, thin median band and/or symmetrical light spots, the ventral side is dark. The metatarsi of the legs are typically shorter than the tibiae. As with other spiders in the family, the tibiae of the 3rd and 4th legs bear a group of long, vibration-sensitive trichobothria. Species in this genus exhibit only slight sexual dimorphism; males ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiosoma Chiripa
''Theridiosoma'' is a genus of ray spiders that was first described by Octavius Pickard-Cambridge in 1879. They use their web as a high speed slingshot to actively hunt for prey. Description Mature spiders in this genus have a body length of 0.5–2.5 mm. The carapace ranges from dark brown to light tan, sometimes with distinct markings around the eye region or fovea, The sternum is smooth, with sparse bristles, and is usually darker towards the margin. A pit organ is present on the anterior margin of the sternum, at both corners. The abdomen is ovoid in shape, and taller than wide or long; the dorsal side of the abdomen often bears a light, thin median band and/or symmetrical light spots, the ventral side is dark. The metatarsi of the legs are typically shorter than the tibiae. As with other spiders in the family, the tibiae of the 3rd and 4th legs bear a group of long, vibration-sensitive trichobothria. Species in this genus exhibit only slight sexual dimorphism; males ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiosoma Caaguara
''Theridiosoma'' is a genus of ray spiders that was first described by Octavius Pickard-Cambridge in 1879. They use their web as a high speed slingshot to actively hunt for prey. Description Mature spiders in this genus have a body length of 0.5–2.5 mm. The carapace ranges from dark brown to light tan, sometimes with distinct markings around the eye region or fovea, The sternum is smooth, with sparse bristles, and is usually darker towards the margin. A pit organ is present on the anterior margin of the sternum, at both corners. The abdomen is ovoid in shape, and taller than wide or long; the dorsal side of the abdomen often bears a light, thin median band and/or symmetrical light spots, the ventral side is dark. The metatarsi of the legs are typically shorter than the tibiae. As with other spiders in the family, the tibiae of the 3rd and 4th legs bear a group of long, vibration-sensitive trichobothria. Species in this genus exhibit only slight sexual dimorphism; males a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiosoma Blaisei
''Theridiosoma'' is a genus of ray spiders that was first described by Octavius Pickard-Cambridge in 1879. They use their web as a high speed slingshot to actively hunt for prey. Description Mature spiders in this genus have a body length of 0.5–2.5 mm. The carapace ranges from dark brown to light tan, sometimes with distinct markings around the eye region or fovea, The sternum is smooth, with sparse bristles, and is usually darker towards the margin. A pit organ is present on the anterior margin of the sternum, at both corners. The abdomen is ovoid in shape, and taller than wide or long; the dorsal side of the abdomen often bears a light, thin median band and/or symmetrical light spots, the ventral side is dark. The metatarsi of the legs are typically shorter than the tibiae. As with other spiders in the family, the tibiae of the 3rd and 4th legs bear a group of long, vibration-sensitive trichobothria. Species in this genus exhibit only slight sexual dimorphism; males ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiosoma Argenteolunulatum
''Theridiosoma'' is a genus of ray spiders that was first described by Octavius Pickard-Cambridge in 1879. They use their web as a high speed slingshot to actively hunt for prey. Description Mature spiders in this genus have a body length of 0.5–2.5 mm. The carapace ranges from dark brown to light tan, sometimes with distinct markings around the eye region or fovea, The sternum is smooth, with sparse bristles, and is usually darker towards the margin. A pit organ is present on the anterior margin of the sternum, at both corners. The abdomen is ovoid in shape, and taller than wide or long; the dorsal side of the abdomen often bears a light, thin median band and/or symmetrical light spots, the ventral side is dark. The metatarsi of the legs are typically shorter than the tibiae. As with other spiders in the family, the tibiae of the 3rd and 4th legs bear a group of long, vibration-sensitive trichobothria. Species in this genus exhibit only slight sexual dimorphism; males ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiosomatidae
The ray spiders (Theridiosomatidae) are a family of spiders first described by Eugène Simon in 1881. They are most recognizable for their construction of cone-shaped webs. The family contains several genera which actively hunt for prey by using their webs to slingshot themselves towards prey. Genera , the World Spider Catalog accepts the following genera: *'' Andasta'' Simon, 1895 – Seychelles, Malaysia, Sri Lanka *'' Baalzebub'' Coddington, 1986 – Central America, Brazil, Australia, China *'' Chthonopes'' Wunderlich, 2011 – Laos *'' Chthonos'' Coddington, 1986 – Ecuador, Brazil, Peru *'' Coddingtonia'' Miller, Griswold & Yin, 2009 – Malaysia, Laos *'' Cuacuba'' Prete, Cizauskas & Brescovit, 2018 *'' Epeirotypus'' O. Pickard-Cambridge, 1894 – Mexico, Costa Rica *'' Epilineutes'' Coddington, 1986 – Mexico, Brazil *'' Karstia'' Chen, 2010 – China *'' Menglunia'' Zhao & Li, 2012 – China *'' Naatlo'' Coddington, 1986 – Central America, South America, Trinidad and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Theridiosoma Gemmosum
''Theridiosoma gemmosum'' is a species of spider in the family Theridiosomatidae, known as ray spiders. It is widely distributed in the Holarctic region. A small spider with a shiny globular abdomen, it constructs a conical orb web. Description ''Theridiosoma gemmosum'' is a small spider. Females are 2–3 mm long, males smaller still at 1.5–2 mm. In both sexes, the carapace (upper surface of the cephalothorax) is dark brown; the upper surface of the abdomen (opisthosoma) is silvery with variable dark lines and marks. The abdomen is globular, more or less circular from above. The male palpal bulbs and the female epigyne are distinctive. Web ''Theridiosoma gemmosum'' constructs a small orb web. The radii do not run directly to a central hub as with other orb webs, but are first joined into groups of two or three before combining to meet in the middle. A single thread runs from the centre to a nearby support, and is held by the spider. While the spider is holding this t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carapace
A carapace is a Dorsum (biology), dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tortoises, the underside is called the plastron. Crustaceans In crustaceans, the carapace functions as a protective cover over the cephalothorax (i.e., the fused head and thorax, as distinct from the abdomen behind). Where it projects forward beyond the eyes, this projection is called a rostrum (anatomy), rostrum. The carapace is Calcification, calcified to varying degrees in different crustaceans. Zooplankton within the phylum Crustacea also have a carapace. These include Cladocera, ostracods, and Isopoda, isopods, but isopods only have a developed "cephalic shield" carapace covering the head. Arachnids In arachnids, the carapace is formed by the fusion of prosomal tergites into a single Plate (animal anatomy), plate which carries the e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilton Ivie
Vaine Wilton Ivie (March 28, 1907 – August 8, 1969) was an American arachnologist, who described hundreds of new species and many new genera of spiders, both under his own name and in collaboration with Ralph Vary Chamberlin. He was employed by the American Museum of Natural History in New York. He also was a supporter of the Technocracy movement. Biography Wilton Ivie was born in Eureka, Utah on March 28, 1907. He attended the University of Utah earning a BSc in 1930 and an MSc in 1932, working under Ralph V. Chamberlin. He remained at Utah as an instructor in zoology from 1932 to 1947, during which time he continued to work on spiders. For the last nine years of his life he worked at the American Museum of Natural History. He died as a result of an auto accident in Kansas on 8 August 1969, during an expedition for the American Museum of Natural History. Taxonomic works Ivie published many texts of information on spiders, often with Chamberlin, for example, ''New tarantula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
