Cymodoce

Khalaji-Pirbalouty, Valiallah & Raupach, Michael J., 2014, A new species of Cymodoce Leach, 1814 (Crustacea: Isopoda: Sphaeromatidae) based on morphological and molecular data, with a key to the Northern Indian Ocean species, Zootaxa 3826 (1), pp. 230-254 : 249

Key to the northern Indian Ocean species of Cymodoce (adult males)

1. Appendix masculina straight, extending slightly beyond endopod apex (by about <one-fifth of length................. 2

- Appendix masculina curving distally, extending well beyond endopod apex (by about one-third of length).............. 5

2. Pleotelson anterior region with 2 prominent longitudinal ridges, posterior region with a domed boss.................... 3

- Pleotelson anterior region lacking 2 prominent longitudinal ridges, posterior region lacking domed boss.......................................................................................... C. fuscina Schotte & Kensley, 2005

3. Pleotelson with a large domed boss, and deep apical notch.................................................... 4

- Pleotelson with a very large domed boss, longitudinal row of tubercles on either side, shallow apical notch.......................................................................................... C. spinula Yousuf & Javed, 2001

4. Each pleotelsonic longitudinal ridges flanked on lateral side by 3 prominent tubercles, uropod rami extending beyond pleotel- sonic medial lobe apex......................................................... C. richardsoniae Nobili, 1906

- Each pleotelsonic longitudinal ridges flanked on lateral side by 2 prominent tubercles, uropod rami not extending to level of pleotelsonic medial lobe apex................................ C. delvarii Khalaji-Pirbalouty, Bruce & Wägele, 2013

5 Uropodal endopod subequal to exopod, medial margin straight, distally oblique................................... 6

- Uropodal endopod longer than exopod, medial margin convex, distal margin acute.............. C. longistylis Miers, 1884

6 Pleotelson anterodorsal part without 2 slightly divergent ridges................................................. 7

- Pleotelson anterodorsal part with 2 slightly divergent ridges............................. C. bicarinata Stebbing, 1904

7 Pleotelson lacking scattered tubercles between two large prominent bifid bosses, flanked on lateral side by 2 prominent tuber- cles. Pereonites 3 and 4 with 2 continuous rows of tubercles............... Cymodoce tribullis Harrison & Holdich, 1984

- Pleotelson with numerous scattered tubercles between two large prominent bifid bosses, lacking 2 prominent lateral side tuber- cles................................................................................ C. waegelei sp. nov.