Criodrilus lacuum Hoffmeister

Diagnosis: Length 120–122 mm. Color, brown. Dorsal pores absent. Body is quadrangular. Setae closely paired. Clitellum on segments 16–42. Genital tumescences on segments 9–13. Male pores on segment 15. Spermathecal pores and tubercula pubertatis absent, seminal vesicles in segments 9–12 (Figure 2D).

Habitat: Near the roots of aquatic plants

Material examined: CCSM-E 000055.2 ex. Guilan Province, Talesh to Lisar, 28.09.2019. Leg . R. Latif, A. Esmaeilizad .