Studies on spirostreptoid millipeds. XVIII. Revalidation of the generic name Doratogonus Attems, 1914, and the status of the name Spirostreptus cristulatus Porat, 1872 (Oiplopoda: Spirostreptida)

Millipeds previously referred to the two South African nominal genera AI/oporus (Porat, 1872) and Doratogonus (A Items, 1914) differ only in the place of ori gin of the ozopore series, and recent specialists have combined the two taxa under the older name Alloporus. However, examination of the type species of that name, A. dissimilis Porat, 1872, strongly suggests that dissimilis is not congeneric with other species now placed in Alloporus, and for them the younger name Dora­ togonus is revived. A generic diagnosis is provided, and the characters of the name Spirostreptus cristulatus, heretofore not placed in any currently recognized genus, are described and illustrated from the type specimen. S. cristulatus is a senior subjecti ve synonym of Doratogonus setosus uncinatus Attems, 1914; Spirostreptus setosus Voges. 1878, is considered to be a full species of Dora­ togonus and not a subspecies of cristulatus with which it is extensively sympatric in Natal, South Africa.