Cryptocephalus socotrensis sp nov., the first representative of the genus from Socotra Island (Coleoptera: Chrysomelidae: Cryptocephalinae)

Cryptocephalus (Cryptocephalus) socotrensis sp. nov., the first known species of Cryptocephalus Geoffroy, 1762 from Socotra Island (Yemen), is described and illustrated. The new species is similar in colouration to the C. undulatus-species group, but differs from all species in this group in a deep incision in the basal margin of pronotum at posterior angles, and a non-spiral spermathecal ductus. Character states of the new species are compared with both Palaearctic and Afrotropical species of Cryptocephalus.