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''Archaeaspis'' is an extinct genus of redlichiid trilobites. It lived during the late Atdabanian stage, which lasted from 521 to 515 million years ago during the early part of the Cambrian Period. The first specimens were first found in Siberia, where they were originally thought to have been endemic. Later, though, more specimen were found in the Inyo Mountains in Southern California.〔(Archaeaspis macropleuron Lieberman, 2002 )〕 An Ediacarian proarticulatan was given the same name, ''Archaeaspis'' Ivantsov, 2001. This is however a junior homonym. The name ''Archaeaspis'' Repina in Khomentovskii and Repina, 1965, for the trilobite has priority. The new valid name for the proarticulate is ''Archaeaspinus'' Ivantsov, 2007. == Etymology == The genus name is the combination of the Ancient Greek ἀρχαῖος (archaīos) meaning "ancient" and ἀσπίς (aspis) meaning "shield". The names of the species have the following derivations. * ''A. hupei'' is named in honor of Pierre Hupé, a distinguished French paleontologist. * ''A. nelsoni'' in named in honor of Clem Nelson, emeritus professor, who worked at the University of California at Los Angeles, and at the White Mountain Research Station. He collected the material the specimens the description ot this species is based upon.〔 * ''A. macropleuron'' is the combination of the Greek words μακρος (makros) meaning "large" and πλευρών (pleuron) meaning "rib", named for the macropleural spine of the 3rd thorax segment in this 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「Archaeaspis」の詳細全文を読む スポンサード リンク
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