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Tivyna Pallida
''Tivyna'' is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by R. V. Chamberlin in 1948. Species it contains four species: *''Tivyna moaba'' (Ivie, 1947) – USA *'' Tivyna pallida'' (Keyserling, 1887) (type) – USA *'' Tivyna petrunkevitchi'' (Gertsch Willis John Gertsch (October 4, 1906 – December 12, 1998) was an American arachnologist. He described over 1,000 species of spiders, scorpions, and other arachnids, including the Brown recluse spider and the Tooth cave spider. Gertsch was born ... & Mulaik, 1940) – USA *'' Tivyna spatula'' (Gertsch & Davis, 1937) – USA, Mexico, Cuba, Bahama Is. References External linksTivynaat BugGuide Araneomorphae genera Dictynidae Spiders of North America {{Dictynidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ralph Vary Chamberlin
Ralph Vary Chamberlin (January 3, 1879October 31, 1967) 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. Chamberlin was a prolific taxonomist who named over 4,000 new animal species in over 400 scientific publications. He specialized in arachnids (spiders, scorpions, and relatives) and myriapods (centipedes, millipedes, and relatives), ranking among the most prolific arachnologists and myriapodologists in history. He described over 1,400 species of spiders, 1,000 species of millipedes, and the majority of North American centipedes, althoug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tivyna Pallida
''Tivyna'' is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by R. V. Chamberlin in 1948. Species it contains four species: *''Tivyna moaba'' (Ivie, 1947) – USA *'' Tivyna pallida'' (Keyserling, 1887) (type) – USA *'' Tivyna petrunkevitchi'' (Gertsch Willis John Gertsch (October 4, 1906 – December 12, 1998) was an American arachnologist. He described over 1,000 species of spiders, scorpions, and other arachnids, including the Brown recluse spider and the Tooth cave spider. Gertsch was born ... & Mulaik, 1940) – USA *'' Tivyna spatula'' (Gertsch & Davis, 1937) – USA, Mexico, Cuba, Bahama Is. References External linksTivynaat BugGuide Araneomorphae genera Dictynidae Spiders of North America {{Dictynidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eugen Von Keyserling
Eugen von Keyserling (22 March 1833 in Pockroy, Lithuania – 4 April 1889 in Dzierżoniów, Silesia) was a Baltic-German arachnologist. He studied in the University of Tartu. He was the author of ''Die Spinnen Amerikas'', and completed ''Die Arachniden Australiens'' (1871–1883) on behalf of 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 .... External links * German arachnologists University of Tartu alumni People from Pakruojis Baltic-German people 1833 births 1889 deaths 19th-century German zoologists {{germany-zoologist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus comes above species and below family (taxonomy), family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus ''Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomy (biology), taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cribellum
Cribellum literally means "little sieve", and in biology the term generally applies to anatomical structures in the form of tiny perforated plates. In certain groups of diatoms it refers to microscopically punctured regions of the frustule, or outer layer. In certain groups of spider species, so-called cribellate spiders, the cribellum is a silk spinning organ. Unlike the usual spinnerets of spiders, the cribellum consists of one or more plates covered in thousands of tiny spigots, tiny holes that hardly project from the surface, in contrast to the elongated spigots that project from spinnerets. These minute spigots produce extremely fine fibers, merely tens of nanometres thick, which are combed out by the spider's calamistrum, producing silk with a woolly texture. The fibers are so small in diameter that they are strongly subject to Van der Waals forces. In addition, the fibres have a surface that absorbs waxes from the epicuticle of insect prey on contact. This creates a po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araneomorphae
The Araneomorphae (also called the Labidognatha) are an infraorder of spiders. They are distinguishable by chelicerae (fangs) that point diagonally forward and cross in a pinching action, in contrast to the Mygalomorphae (tarantulas and their close kin), where they point straight down. Araneomorphs comprise the vast majority of living spiders. Distinguishing characteristics Most spider species are Araneomorphae, which have fangs that face towards each other, increasing the orientations they can employ during prey capture. They have fewer book lungs (when present), and the females typically live one year. The Mygalomorphae have fangs that face towards the ground, and which are parallel to the long axis of the spider's body, thus they have only one orientation they can employ during prey capture. They have four pairs of book lungs, and the females often live many years. Image:Atrax robustus.jpg, This ''Atrax robustus'' shows the orientation of Myglamorphae fangs. Image:Che ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dictynidae
Dictynidae is a family (biology), family of cribellate, hackled band-producing spiders first described by Octavius Pickard-Cambridge in 1871. Most build irregular webs on or near the ground, creating a tangle of silken fibers among several branches or stems of one plant. The genus ''Argyroneta'' has been placed in a separate family Argyronetidae, but the family is not accepted by the World Spider Catalog and the genus is included in the Dictynidae. Genera , the World Spider Catalog accepts the following genera: *''Adenodictyna'' Ono, 2008 — Japan *''Aebutina'' Simon, 1892 — Ecuador, Brazil *''Ajmonia'' Caporiacco, 1934 — Asia, Algeria *''Altella'' Simon, 1884 — Europe, Asia, Algeria *''Anaxibia_(spider), Anaxibia'' Thorell, 1898 — Asia, Africa *''Arangina'' Lehtinen, 1967 — New Zealand *''Archaeodictyna'' Caporiacco, 1928 — Asia, Europe, Africa *''Arctella'' Holm, 1945 — Asia, North America *''Argenna'' Thorell, 1870 — Asia, North America *''Argennina'' Gertsch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tivyna Moaba
''Tivyna moaba'' is a species of mesh web weaver in the family of spiders 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 dive ... known as Dictynidae. It is found in the US. References Dictynidae Articles created by Qbugbot Spiders described in 1947 {{dictynidae-stub ... [...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] |
Type Species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name that has that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have such types. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tivyna Petrunkevitchi
''Tivyna'' is a genus of cribellate araneomorph spiders in the family Dictynidae, and was first described by R. V. Chamberlin in 1948. Species it contains four species: *''Tivyna moaba'' (Ivie, 1947) – USA *''Tivyna pallida'' (Keyserling, 1887) (type) – USA *'' Tivyna petrunkevitchi'' (Gertsch Willis John Gertsch (October 4, 1906 – December 12, 1998) was an American arachnologist. He described over 1,000 species of spiders, scorpions, and other arachnids, including the Brown recluse spider and the Tooth cave spider. Gertsch was born ... & Mulaik, 1940) – USA *'' Tivyna spatula'' (Gertsch & Davis, 1937) – USA, Mexico, Cuba, Bahama Is. References External linksTivynaat BugGuide Araneomorphae genera Dictynidae Spiders of North America {{Dictynidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_(2).jpg "Click for more on -> Type Species")