Yingying Wang, Guoquan Wang, Ding Yang, Weihai Li
The Amphinemura sinensis species group is distributed in China and Vietnam and is characterized by the horn-shaped lateral processes of the dorsal sclerite and the pointed ventral sclerite of the male epiproct. Species in the group are often difficult to distinguish because of their similar morphology and the limited number of reliable diagnostic characters. In this study, we examined the A. sinensis species using morphological and molecular data. COI sequences were obtained for 16 of the 34 recognized species, including the four new species described herein. Detailed examination of male genital structures and comparisons with previously described species support the recognition of four new species. The four new species are described and illustrated. With these additions, the A. sinensis species group now comprises 34 species.