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Tytthus
''Tytthus'' is a (carnivorous ) (flesh eating) insect of the Phylinae subfamily of the "true bugs". They feed upon the eggs of various Delphacidae, and thus are important in the biological control of pests. It is distributed throughout the Holarctic of the Northern Hemisphere, but species are also found in the tropics, in China, South America, Australia, and the Indo-Pacific area.〔
==Type species==
In 1860 Gustav Flor described a bug he found in Estonia and named it ''Capsus geminus''. When Fieber established the genus ''Tytthus'' in 1864, he named two species to the genus, Zetterstedt's ''Capus pygmaeus'' and Flor's ''Capus geminus''. ''Capus geminus'' thus became ''Tytthus geminus'', by which name it was known as for well over a hundred years. In 1906 Kirkaldy named then ''Tytthus geminus'' as the type species for the genus. But, as Henry and Wheeler discovered in 1988, the name ''Capsus geminus'' was not available in 1860, because Thomas Say had already used it 1832 for another species entirely. So, after researching the various previous nomenclaturial acts regarding the bug, they discovered that the next available name was one used by Harry H. Knight in 1931 to describe the same bug as if it were a new species, but placing it in the genus ''Cyrtorhinus'' Fieber, 1858 as Reuter had made ''Tytthus'' a junior synonym of ''Cyrtorhinus''. Knight's name, ''Cyrtorhinus pubescens'' was the oldest junior synonym.〔 In 1992, Wheeler and Henry published a treatise reviewing the Miridae family occurring in the Holarctic, and formally corrected the nomenclaturial error in accordance with the International Code of Zoological Nomenclature,〔 with the result that the type species was henceforth called ''Tytthus pubescens'' (Knight, 1931).〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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