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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Electrostephanus ： ウィキペディア英語版 Electrostephanus ''Electrostephanus'' is an extinct genus of crown wasp in the hymenopteran family Stephanidae, and is the only genus placed in the subfamily Electrostephaninae. The genus contains four described species, ''E. brevicornis'', ''E. neovenatus'', ''E. janzeni'', and ''E. petiolatus'', placed in two subgenera ''E. (Electrostephanus)'' and ''E. (Electrostephanodes)''. ''Electrostephanus'' is known from several middle Eocene fossils which have been found in Europe. ==History and classification== ''Electrostephanus'' is known from a group of fossils preserved as an inclusions in a transparent chunks of Baltic amber. Baltic amber is approximately forty six million years old, having been deposited during Lutetian stage of the Middle Eocene. There is debate as to what plant family the amber was produced by, with evidence supporting relatives of either ''Agathis'' or ''Pseudolarix'' trees. The genus was originally described by paleoentomologist Charles Thomas Brues in 1933 with Brues designating ''E. petiolatus'' as the type species, and including two other species, ''E. tridentatus'' and ''E. brevicornis''. A fourth species, ''"E." sulcatus'' and fifth, ''E. neovenatus'', were described by Antonio Aguiar and Jens-Wilhelm Janzen 1999, and a sixth species. ''E. janzeni'', was described in 2005.〔 The original type specimens for ''E. petiolatus'', ''"E." tridentatus'' and ''"E." brevicornis'' were part of the Albertus Universität, Königsberg collection of ambers, and all were possibly lost to fire during the bombing of Kaliningrad in World War II.〔 Based on the structure of the petiole and abdomen in ''"E.". sulcatus'' and the suggestion that ''E. petiolatus'' had the same morphology, ''Electrostephanus'' was designated a junior synonym of ''Denaeostephanus'' in 2004. However, this move was reversed with the description of an additional male ''E. petiolatus'' specimen in 2008 by Michael S. Engel and Jaime Ortega-Blanco, who designated the new specimen the neotype for ''E. petiolatus''. Engel and Ortega-Blanco transferred the species back to ''Electrostephanus'' along with ''E. brevicornis'', ''E. neovenatus'', and ''E. janzeni'', but retaining ''D. tridentatus'' in ''Denaeostephanus''. Based on the abdomen morphology Engel and Ortega-Blanco further split the genus into two distinct subgenera, ''E. (Electrostephanus)'' containing the type species ''E. petiolatus'', and ''E. (Electrostephanodes)'' containing the remaining three species. They noted that ''Electrostephanodes'' may merit elevation to full genus status, but the lack of additional known fossil specimens to consult meant they opted for a conservative subgenus placement.〔 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「Electrostephanus」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.