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Aphaenogaster avita
''Aphaenogaster avita'' is an extinct species of ant in the subfamily Myrmicinae known from a solitary early to middle Miocene fossil found in Japan. At the time of description ''A. praerelicta'' was one of twelve ''Aphaenogaster'' species to have been described from fossils and the only fossil species from Japan.
==History and classification==
''Aphaenogaster avita'' is known from a solitary fossil insect which is a compression-impression fossil preserved in a layer of soft diatomite. Along with a several other insect fossils, the ''A. avita'' specimen was collected in 1969〔 from layers of the early to middle Miocene〔 Chojabaru Formation. The formation is composed of diatomites, sandstones and mudstones with the insects recovered from the upper and middle sections. The formation outcrops in a small area on Cape Chojabaru on the eastern side of Iki Island, and the flora of the formation is notably similar to that of Daijima flora, which is noted to be Middle Miocene in age.〔
The fossil ant was first studied by paleoentomologist Ienori Fujiyama of the National Museum of Nature and Science in Tokyo. Fujiyama's 1970 type description of the new species was published in the Japanese journal ''Memoirs of the Natural Science Museum, Tokyo''. The etymology for the specific epithet ''avita'' was not given with the type description. When first descried the species was placed by Fujiyama into the ''Aphaenogaster'' subgenus "''Deromyrma''",〔 however in the time since the type description, "''Deromyrma''" has been subsumed into ''Aphaenogaster'' as a junior synonym and is no longer in use.
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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