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Frederiksen, S.B. and Enghoff, H. 2012. East African odontopygid millipedes 1: Five new species of Xystopyge (Attems, 1909) and a proposal for a new gonopod terminology (Diplopoda; Spirostreptida; Odontopygidae). Zootaxa. 3485, 1 (Sep. 2012), 69–82. DOI:https://doi.org/10.11646/zootaxa.3485.1.5.