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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 Hedstroemia (trilobite) ： ウィキペディア英語版 Hedstroemia (trilobite) ''Hedstroemia '' is a genus of trilobites in the order Proetida known from the Silurian period of Europe, Asia, and North America. ==Taxonomic history== The genus ''Hedstroemia'' was named in 1978. The type species designated was ''Hedstroemia delicatus'', which had originally been described as ''Proetus delicatus'' in 1923. In 1990 the subgenus ''Pachyproetus'' was proposed to accommodate a single species, ''P. pachydermata.'' In 1994, the genus ''Milesdavis'' was proposed based on incomplete fossils consisting of the pygidium (rear segment) of three individuals. The genus was named after musician Miles Davis, and the type species, ''Milesdavis eldredgei'', was named in honor of the paleontologist Niles Eldredge. In 1997, ''Milesdavis'' and the subgenus ''Pachyproetus'' were recognized as junior synonyms of ''Hedstroemia'', by paleontologist Jonathan Adrain: the former due to morphological similarities, the latter due to Adrain viewing the monotypic subgenus as "pointless".〔 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「Hedstroemia (trilobite)」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.