The genera Dioryx and Cycloryx (Gastropoda, Caenogastropoda, Alycaeidae) in Bhutan, with a description of four new species

Samples of the genera Dioryx and Cycloryx from Bhutan are identified or described as new species. Next to the wide­spread D. urnula, 7 species of Cycloryx are recognized, 4 of which are endemic to Bhutan and new to science, viz. C. pemaledai Gittenberger & Sherub, spec. nov., C. globhu­tanus Gittenberger & Sherub, spec. nov., C. haumbiclausus Gittenberger & Gyeltshen, spec. nov., and C. sajumbiclausus Gittenberger & Gyeltshen, spec. nov. An identification key is provided for Cycloryx species. Cycloryx summus (Godwin-Austen, 1914), which was described from “Rechila Peak, Western Bhutan”, is not accepted as a Bhutanese species since its type locality is most probably in West Bengal, out­side the present borders of Bhutan.