Genus Holoscolex Cognetti de Martiis, 1904

Type species. Holoscolex nemorosus Cognetti de Martiis, 1904

Diagnosis. Setae in 8 longitudinal lines. One pair of intra-clitellar male pores, paired spermathecae in one or more segments. One pair of calciferous glands in XI or XII with composite-tubular structure and non-glandular reservoir. Sexual system holandric and metagynous; seminal vesicles in general short or long.