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Pygocephalomorpha
The order Pygocephalomorpha is an extinct group of peracarid crustaceans. Pygocephalomorpha were abundant from the Carboniferous until their extinction in the Permian. Families The order contains extinct five families, and seven genera ''incertae sedis'': * Jerometichenoriidae **'' Jerometichenoria'' * Notocarididae **'' Notocaris'' **'' Paulocaris'' * Pygocephalidae **'' Anthracaris'' **'' Mamayocaris'' **'' Pygocephalus'' * Tealliocarididae **''Tealliocaris'' * Tylocarididae **'' Chaocaris'' **'' Fujianocaris'' **'' Liocaris'' **'' Pseudogalathea'' **'' Tylocaris'' *Pygocephalomorpha **'' Bellocaris'' **'' Hoplita'' **'' Iraticaris'' **'' Permocaris'' **'' Pittinucaris'' **'' Pygaspis'' **'' Sosiocaris'' See also *''Tealliocaris ''Tealliocaris'' is an extinct genus of pygocephalomorphans from the Carboniferous. Species The genus contains eight described species: *''Tealliocaris caudafimbriata'' *''Tealliocaris etheridgei'' *''Tealliocaris form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peracarida
The superorder Peracarida is a large group of malacostracan crustaceans, having members in marine, freshwater, and terrestrial habitats. They are chiefly defined by the presence of a brood pouch, or ''marsupium'', formed from thin flattened plates ( oostegites) borne on the basalmost segments of the legs. Peracarida is one of the largest crustacean taxa and includes about 12,000 species. Most members are less than in length, but the largest is probably the giant isopod (''Bathynomus giganteus'') which can reach . The earliest known perecaridian was '' Oxyuropoda ligioides'', a fossil of which has been found dating to the Late Devonian (more than 360 mya) of Ireland. Characteristics The most obvious characteristic of the group is the marsupium in females. This brood pouch is enclosed by the large, flexible oostergites, bristly flaps which extend from the basal segments of the thoracic appendages, which form the floor of a chamber roofed by the animal's sternum. This chamber i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karl Beurlen
Karl Beurlen (17 April 1901 – 27 December 1985) was a German paleontologist.Rieppel, Olivier. (2012). ''Karl Beurlen (1901-1985), Nature mysticism, and Aryan Paleontology''. ''Journal of the History of Biology'' 45: 253-299. Beurlen was born in Aalen. He attended University of Tübingen. He completed a PhD in 1923.Levit, Georgy S; Olsson, Lennart. (2007). ''Evolution on Rails Mechanisms and Levels of Orthogenesis''. In Volker Wissemann. ''Annals of the History and Philosophy of Biology 11/2006''. Universitätsverlag Göttingen. pp. 115-119 Beurlen was a proponent of orthogenesis and saltational evolution. He used the term ''metakinesis'' (coined by Otto Jaekel) to describe sudden changes of development in organisms. He also invented the term ''palingenesis'' as a mechanism for his orthogenetic theory of evolution. He was an assistant of Edwin Hennig.Stindl, Reinhard. (2014)''The telomeric sync model of speciation: species-wide telomere erosion triggers cycles of transposon-medi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
