Reproductive System of the Type Specimens of Urogonimus macrostomus (Rudolphi, 1803) Monticelli, 1888 (Digenea)

The reproductive system of the type specimens of Distoma macrostomum and D. ringens Rudolphi, 1819, has been reinvestigated. The shape and position of the cirrus, cirrus pouch, metraterm, "vesicula seminalis", gonads, vitellaria and uterus arrangements are given. This shows that the arrangement of the reproductive system in D. macrostomum (syn. D. ringens ) differs from that of the members of the genera Leucochloridium Carus, 1835 (sensu Kagan 1952) and Neoleucochloridium Kagan, 1951. It confirms as correct to place D. macrostomum as a separate genus, Urogonimus Monticelli, 1888.