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Chelypus Wuehlischi
''Chelypus'' ('clawfoot') is a genus of slow-moving, burrowing sunspiders confined to the deserts and arid regions of Southern Africa. Description They are readily separated from other Solifugae by an absence of claws on the fourth pair of legs. Both ''Chelypus'', and the related genus ''Hexisopus'' spend a large part of their existence underground, and their 2nd, 3rd and particularly 4th pair of legs are shortened and robust, and equipped with rake-like spines for digging. Members of the family Hexisopodidae differ markedly in morphology from those of other Solifugae families - most patently in their fossorial rather than cursorial legs. Such extreme modifications often blur relationships with other taxa, and hexisopodid genealogy is no exception. The main external difference between ''Chelypus'' and ''Hexisopus'' is the presence of well-developed spines on the pedipalps of Chelypus. Its subterranean way of life makes the family extremely difficult to study. Distributio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Friedrich Roewer
Carl Friedrich Roewer (12 October 1881, in Neustrelitz – 17 June 1963) was a German arachnologist. He concentrated on harvestmen, where he described almost a third (2,260) of today's known species, but also almost 700 taxa of spiders and numerous Solifugae. He joined the Nazi Party in the 1930s. From 1933 on, he was the second director of the Übersee-Museum in Bremen, Germany. Under his direction the museum intensified its advocacy of scientific racism. The Senckenbergische Naturforschende Gesellschaft bought his extensive collection (including type material from other arachnologists such as L. Koch, Eugène Simon, Thorell, Philipp Bertkau and Friedrich Dahl Karl Friedrich Theodor Dahl (June 24, 1856 in Rosenhofer Brök north of Dahme, Holstein – June 29, 1929 in Greifswald) was a German zoologist, and in particular an arachnologist. The son of a farmer, Dahl studied at the universities of Le ...) and his private library.Senckenberg forschungsinstitut und na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arachnids Of Africa
Arachnida () is a class of joint-legged invertebrate animals (arthropods), in the subphylum Chelicerata. Arachnida includes, among others, spiders, scorpions, ticks, mites, pseudoscorpions, harvestmen, camel spiders, whip spiders and vinegaroons. Almost all adult arachnids have eight legs, although the front pair of legs in some species has converted to a sensory function, while in other species, different appendages can grow large enough to take on the appearance of extra pairs of legs. The term is derived from the Greek word (''aráchnē'', 'spider'), from the myth of the hubristic human weaver Arachne, who was turned into a spider. Almost all extant arachnids are terrestrial, living mainly on land. However, some inhabit freshwater environments and, with the exception of the pelagic zone, marine environments as well. They comprise over 100,000 named species, of which 47,000 are species of spiders. Morphology Almost all adult arachnids have eight legs, unlike adult insec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelypus Wuehlischi
''Chelypus'' ('clawfoot') is a genus of slow-moving, burrowing sunspiders confined to the deserts and arid regions of Southern Africa. Description They are readily separated from other Solifugae by an absence of claws on the fourth pair of legs. Both ''Chelypus'', and the related genus ''Hexisopus'' spend a large part of their existence underground, and their 2nd, 3rd and particularly 4th pair of legs are shortened and robust, and equipped with rake-like spines for digging. Members of the family Hexisopodidae differ markedly in morphology from those of other Solifugae families - most patently in their fossorial rather than cursorial legs. Such extreme modifications often blur relationships with other taxa, and hexisopodid genealogy is no exception. The main external difference between ''Chelypus'' and ''Hexisopus'' is the presence of well-developed spines on the pedipalps of Chelypus. Its subterranean way of life makes the family extremely difficult to study. Distributio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botswana
Botswana (, ), officially the Republic of Botswana ( tn, Lefatshe la Botswana, label= Setswana, ), is a landlocked country in Southern Africa. Botswana is topographically flat, with approximately 70 percent of its territory being the Kalahari Desert. It is bordered by South Africa to the south and southeast, Namibia to the west and north, and Zimbabwe to the northeast. It is connected to Zambia across the short Zambezi River border by the Kazungula Bridge. A country of slightly over 2.3 million people, Botswana is one of the most sparsely populated countries in the world. About 11.6 percent of the population lives in the capital and largest city, Gaborone. Formerly one of the world's poorest countries—with a GDP per capita of about US$70 per year in the late 1960s—it has since transformed itself into an upper-middle-income country, with one of the world's fastest-growing economies. Modern-day humans first inhabited the country over 200,000 years ago. The Tswa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of Taxonomy (biology), 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 reproduction, produce Fertility, fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), 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 binomial nomenclature, 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 specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
