Report on freshwater Catenulida (Platyhelminthes) from Sweden with the description of four new species Author Larsson, Karolina Author Willems, Wim text Zootaxa 2010 2396 1 18 journal article 10.5281/zenodo.193965 38d7b0ca-ac3c-4c22-8a28-fa4034b43e03 1175-5326 193965 Stenostomum leucops (Dugès, 1828) O . Schmidt, 1848 ( Fig. 5 F–G, 7 I –J) Localities. Loc. 1, 6, 10, 11, 16, 17, 18, 29, 31, 32, 33. Known distribution. Cosmopolitan (in Noreña et al . 2005 ) Material. Several individuals studied alive. Description and remarks. Specimens were identified mainly based on the shape of the refractile organs (fig. 7J). A few specimens, which were collected in October had developed reproductive organs (cf. Luther 1960 ). In these specimens the male genital pore, which is situated dorsally at approximately 1/5, could be observed. A simple testis, is present next to the pharynx. A few specimens also contained eggs situated in between the intestine and the body wall. These sexually-mature specimens are approximately 1–2 mm , whereas the length of specimens collected in May to September ranges between 0.4 and 1 mm .