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Zigrasimecia
''Zigrasimecia'' is an extinct genus of ant in the Formicidae subfamily Sphecomyrminae, and is currently placed in the tribe Sphecomyrmini.〔 The genus contains two described species: the type species ''Zigrasimecia tonsora''〔 and ''Zigrasimecia ferox''. Both species are known from Middle Cretaceous fossils which were found in Asia.〔
== History and classification ==
''Zigrasimecia'' is known from a solitary adult fossil, the holotype, specimen number JZC Bu-159. At the time of description, the specimen was residing in the private collection of James Zigras and only available for study through the American Museum of Natural History.〔 The holotype specimen is composed of a mostly complete dealate adult female which has been preserved as an inclusion in transparent chunks of deep yellow and relatively clear Burmese amber. The amber specimen was recovered from deposits in Kachin State, west of Myitkyna town in Myanmar. Burmese amber has been radiometrically dated using U-Pb isotopes, yielding an age of approximately 99 million years old, close to the Aptian – Cenomanian boundary.〔
The fossil was first studied by paleoentomologists Phillip Barden and David Grimaldi, both of the American Museum of Natural History.〔 Barden and Grimaldi's 2013 type description of the new genus and species was published in the online journal ''Zootaxa''.〔 The genus name ''Zigrasimecia'' is a patronym which was coined as a combination of James Zigras' last name and -''mecia'' which is a commonly used suffix in ant generic names. The specific epithet ''tonsora'' was derived from a combination of the Latin words "tonsor" meaning ''barber or hairdresser'' and "oris" meaning ''mouth''.〔 ''Zigrasimecia'' is one of seven ant species described from Burmese amber and one of the five Burmese amber species placed in Sphecomyrminae. The other sphecomyrmin species are ''Haidomyrmex cerberus'', ''Haidomyrmex scimitarus'', ''Haidomyrmex zigrasi'', and ''Sphecomyrmodes orientalis''.〔
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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