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| image = Xyloiulus_mazonus.jpg | image_caption = ''Xyloiulus mazonus'' | regnum = Animalia | phylum = Arthropoda | subphylum = Myriapoda | classis = Diplopoda | superordo = Juliformia |ordo=''incertae sedis'' | superfamilia = †Xyloiuloidea | superfamilia authority=Cook, 1895 | subdivision_ranks=Families |subdivision= *†Gaspestriidae *†Nyraniidae *†Plagiascetidae *†Xyloiulidae }} Xyloiuloidea is an extinct superfamily of millipedes known from the Lower Devonian through the Upper Pennsylvanian of Europe and North America. ==Description== Xyloiuloids are more or less cylindrical, with sternites, pleurites, and tergites of each body segment fused into a complete ring. Adults possess 40 to 50 body rings. The legs are no longer than half the height of the body. The body surface is marked by small parallel grooves (striations), which vary in surface coverage between xyloiuloid families. 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「Xyloiuloidea」の詳細全文を読む スポンサード リンク
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