A new species of Acanthopetalum Verhoeff, 1900 (Diplopoda: Callipodida: Schizopetalidae) from Bulgaria, with a review of the A. richii (Gray, 1832) group

摘要

The millipede genus Acanthopetalum (Callipodida: Schizopetalidae) comprises 11 species distributed from the southern Apennines in the west to the Aegean coast of Turkey in the east. A single species, A. carinatum (Brandt, 1840), has been recorded from Bulgaria (Rhodopes Mts.). Recent study of freshly collected material coming from the same area has revealed that A. carinatum is erroneously recorded for the country, and the genus is actually represented in the Rhodopes by a new species, Acanthopetalum rhodopinum sp. n., whose description is provided. It is well distinguished from the other congeners by the presence of two sharp processes on the coxa of male leg-pair 7, and processes m, n and g on the inner branch of gonopod femoroid. New illustrations of gonopods and male leg-pair 7 of A. albidicolle (Verhoeff, 1900) and A. richii and an identification key for all species of the A. richii (Gray, 1832) group are provided for better distinction of the new species. A. richii is herewith reported for the first time from Turkey; its presence there might be due to human introduction.