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Linothele Spinosa
''Linothele'' is a genus of South American curtain web spiders that was first described by Ferdinand Karsch in 1879. The venom of Linothele sp has a median lethal dose of 0.6 mg / kg, two toxins, both of low molecular weight, were isolated in the venom, Ls1 and Ls2. These two toxins have been shown to be quite lethal to white mice by injection into the cerebroventricular region. The lethal dose of Ls1 and Ls2 is 24 and 19 μg / kg respectively, both toxins represent 0.21% and 0.43% of the weight of the whole venom. Species it contains twenty-one species: *'' Linothele cavicola'' Goloboff, 1994 – Ecuador *'' Linothele cristata'' (Mello-Leitão, 1945) – Brazil *'' Linothele curvitarsis'' Karsch, 1879 ( type) – Venezuela *''Linothele fallax'' (Mello-Leitão, 1926) – Bolivia, Brazil *'' Linothele gaujoni'' (Simon, 1889) – Ecuador *'' Linothele jelskii'' ( F. O. Pickard-Cambridge, 1896) – Peru *'' Linothele longicauda'' (Ausserer, 1871) – Ecuador *'' Linothele macroth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ferdinand Karsch
Ferdinand Anton Franz Karsch or Karsch-Haack (2 September 1853, in Münster – 20 December 1936, in Berlin) was a German arachnologist, entomologist and anthropologist. The son of a doctor, Karsch was educated at the Friedrich Wilhelm University in Berlin and published a thesis on the gall wasp in 1877. From 1878 to 1921 he held the post of curator at the Museum für Naturkunde Berlin. Between 1873 and 1893, he published a catalogue of the spiders of Westphalia; he also published numerous articles on the specimens that the museum received from various explorers and naturalists working in Africa, in China, in Japan, in Australia, etc. This publication of others' work sometimes led to disputes over priority and nomenclature, for example with Pickard-Cambridge. Alongside his zoological activities, he published many works on sexuality and, in particular, homosexuality in both the animal kingdom and in so-called "primitive" peoples, including ''Das gleichgeschlechtliche Leben ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |