A new species of Lophostreptus Cook, 1895 discovered among syntypes of L.regularis Attems, 1909 (Diplopoda, Spirostreptida, Spirostreptidae).

A new species of the genus Lophostreptus Cook, 1895 is described, based on specimens hidden for over a century among the syntypes of its congener Lophostreptusregularis Attems, 1909 housed in the Naturhistoriska Riksmuseet Stockholm (NRMS) and the Naturhistorisches Museum Wien (NHMW). A lectotype is designated for Lophostreptusregularis Attems, 1909 in order to stabilize its taxonomy. Updates to the millipede fauna of Mt. Kilimanjaro, Tanzania are provided.