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Gesomyrmex pulcher : ウィキペディア英語版
Gesomyrmex pulcher

''Gesomyrmex pulcher'' is an extinct species of ant in the subfamily Formicinae known from an Eocene fossil found in Europe. ''G. pulcher'' is one of only eight species in the ant genus ''Gesomyrmex'' to have been described from fossils found in Europe.
==History and classification==
When described, ''Gesomyrmex pulcher'' was known from a solitary fossil insect which is a compression-impression fossil preserved in a layer of soft sedimentary rock. Along with other well preserved insect fossils, the ''G. pulcher'' specimen was collected from layers of the Lutetian Messel pit World Heritage Site. The formation is composed of brown coals, oil shales, and bituminous shale, which preserved numerous insects, fish, birds, reptiles, and terrestrial mammals as a notable lagerstätten. The area is a preserved maar lake which initially formed approximately 47 million years ago as the result of volcanic explosions.〔
At the time of description, the holotype specimen, number SMF MeI 10999, was preserved in the Senckenberg Research Station Messel fossil collections. The insect was first studied by German entomologists Gennady Dlussky, Torsten Wappler and Sonja Wedmann; their 2009 type description of the new species was published in the electronic journal ''Zootaxa''. The specific epithet ''pulcher'' is Latin, meaning "beautiful".〔
The species is one of eight ''Gesomyrmex'' species, all of which have been described from European fossils. Three species were described prior to ''G. pulcher'', ''G. bremii'' in 1849, ''G. hoernesi'' in 1868, and ''G. miegi'' in 1937. The remaining four species; ''G. breviceps'', ''G. curiosus'', ''G. flavescens'', and ''G. germanicus'' were all described by Dlussky ''et al'' in the same 2009 paper as ''G. pulcher''.〔 Six modern ''Gesomyrmex'' species have been described so far, all from the tropical regions of Asia, creating a disjunct distribution between the fossil species and the modern species.〔

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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