A revision of the taxonomy and distribution of Archispirostreptus Silvestri 1895 (Diplopoda, Spirostreptida, Spirostreptidae), and description of a new spirostreptid genus with three new species

As it is currently defined, Archispirostreptus includes two species groups ( the southern African and the east African) with distinct kinds of gonopods. A new genus, Cacuminostreptus Mwabvu, is proposed to accommodate the southern African species which include C. conatus (Attems 1928) comb. n. and three new species, C. vumbaensis Mwabvu, C. triangulatus Mwabvu and C. mazowensis Mwabvu. Two new synonymies are established: A. Cecchii Silvestri 1897 = A. phillipsii Pocock 1896 and A. transmarinus Hoffman 1965 = A. syriacus (Saussure 1859). The species A. arabs Pocock 1895 is incertae sedis; and A. sumptuosus Silvestri 1896 is a nomen dubium. Identification keys to the genera and species based on gonopod morphology and distribution data are presented.