Discocelis

Maghsoudlou, Abdolvahab & Rahimian, Hassan, 2013, Description of two new Discocelis species (Polycladida: Acotylea: Discocelidae) from the Persian Gulf with a review of the genus, Zootaxa 3683 (3), pp. 247-266 : 265

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