Description of two new Discocelis species (Polycladida: Acotylea: Discocelidae) from the Persian Gulf with a review of the genus Author Maghsoudlou, Abdolvahab Author Rahimian, Hassan text Zootaxa 2013 3683 3 247 266 journal article 10.11646/zootaxa.3683.3.2 f7001117-aab0-4245-bf9c-6fbacdfc41c7 1175-5326 248233 845A5A13-A77B-4181-8CAB-D2D4170954DF Key to the valid Discocelis species 1. Male atrium with muscular folds (villus-like projections)....................................................... 2 - Male atrium without muscular folds....................................................................... 3 2. Male atrium with numerous muscular folds, cerebral eyes as anterior and posterior groups............................4 - Male atrium with scattered muscular folds, cerebral eyes as single elongate group.................... D. fulva Kato, 1944 3. Marginal eyes extend anteriorly.......................................................................... 5 - Marginal eyes extend near to posterior end of body........................................................... 6 4. Male atrium with few prostatoids, without prostatoid organs on posterior lobe's branch dorsal to vagina...................................................................................................... D. pusilla Kato, 1938 - Male atrium with numerous prostatoids, with prostatoid organs on posterior lobe's branch dorsal to vagina....................................................................................... D. japonica Yeri and Kaburaki, 1918 5. Cerebral eyes as anterior and posterior groups................................................. D. persica sp. nov. - Cerebral eyes as single elongate group..................................... D . tigrina (Blanchard, 1847) Lang, 1884 6. Male atrium with two lobes, anterior lobe of the male atrium with prostatoids around the lobe, vagina has two dorsal and ventral curves................................................................................. D. hollemani sp. nov. - Male atrium has more than two lobes, anterior lobe of the male atrium with prostatoids on one side, vagina has one dorsal and ventral curve................................................................. D. parvimaculata Beveridge, 2000