翻訳と辞書 Words near each other ・ Afromelittia aenescens ・ Afromelittia iridisquama ・ Afromelittia natalensis ・ Afromelittia occidentalis ・ Afromental ・ AFROMET ・ Afromicrodon ・ Afromizonus ・ Afromontane ・ Afromurzinia ・ Afromurzinia fletcheri ・ Afromurzinia lutescens ・ Afromurzinia sublutescens ・ Afromyelois ・ Afromylea ・ Afromyrma ・ Afronandus sheljuzhkoi ・ Afronausibius ・ Afronemacheilus ・ Afronemacheilus abyssinicus ・ Afroneta ・ Afroneta altivaga ・ Afroneta annulata ・ Afroneta bamilekei ・ Afroneta basilewskyi ・ Afroneta blesti ・ Afroneta elgonensis ・ Afroneta erecta ・ Afroneta fulva ・ Afroneta fusca Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Afromyrma ： ウィキペディア英語版 Afromyrma ''Afromyrma'' is an extinct genus of ant in the formicid subfamily Myrmicinae, and is currently unplaced in any of the tribes of that subfamily. The genus contains a single described species, ''Afromyrma petrosa''. ''Afromyrma'' is known from a single Upper Cretaceous fossil, which was found in Orapa in the Central District of Botswana. == History and classification == ''Afromyrma'' is known from a solitary fossil from Orapa, the holotype, specimen number BP/2/26501 tentatively identified as a female, though there is a possibility this is incorrect.〔 The holotype specimen is mostly complete but is rather poor in details, and is preserved as a compression fossil in shale. The shales and mudstones of the Orapa site were rapidly deposited in a crater lake formed as the result of a large volcanic eruption in the Cretaceous. The sediment originated as an epiclastic kimberlite and derives from rapid weathering and decomposition of the sides of the kimberlite crater. Of the four major sedimentation types that have been observe at Orapa, fossils are found in only two, the granular mass flows and the fine-grained sediments: woody debris fossils are found in the granular mass flows, but well-preserved fossils are only recovered in the fine-grained sediments. The fossil-bearing stratum was uncovered during mining of the underlying diamond-bearing rocks at the site. radiometric dating of the kimberlite pipe reported on in 1977 gave a general age between .〔 Further dating utilizing zircon crystals reported on in 2004 gave more defined age of approximately placing the date in the Turonian age of the late Cretaceous.〔 The fossil was first studied by Russian paleontologists Gennady M. Dlussky and Alexandr Rasnitsyn with South African paleontologist Denis Brothers. Their 2004 type description of the new genus and species was published in the journal ''Insect Systematics and Evolution''.〔 The genus name ''Afromyrma'' is a combination of Africa, where the fossil was found, and the Greek ''myrmex'' which means "ant". The specific epithet ''petrosa'', a derivation of the Latin word ''petra'' meaning ''rock'' is a reference to the fossil status of the species.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Afromyrma」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.