Xyloiuloidea
| Xyloiuloidea Temporal range: | |
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| Xyloiulus mazonus | |
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| Superfamily: | †Xyloiuloidea Cook, 1895 |
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Xyloiuloidea is an extinct superfamily of millipedes that existed from the Lower Devonian through the Upper Pennsylvanian period in Europe and North America.