Pseudoniphargus, Dole-Olivier & Hafid & Piscart, 2018

Dole-Olivier, Marie-Jose, Hafid, Hinda & Piscart, Christophe, 2018, A new groundwater species of Pseudoniphargus (Amphipoda: Pseudoniphargidae) fromAlgeria, Zootaxa 4482 (1), pp. 125-139 : 137-138

Key to Pseudoniphargus species from Continental Africa and Mediterranean Islands

1 Uropod 1 peduncle without basofacial spine................................................................ 2 - Uropod 1 peduncle with strong basofacial spine............................................................. 5

2. Telson markedly notched................................................................................ 3

- Telson notch poorly marked................................................................ P. djemoi sp. nov.

3. Telson not elongated, quadrangular........................................................................ 4

- Telson elongated, longer than wide.................................................. P. macrotelsonis Stock, 1980

4. Uropod 3 sexually dimorphic; accessory flagellum of antenna 1 shorter than the first article of main flagellum; basis of pereopod 7 without posterodistal lobe............................................... P. sodalis Karaman & Ruffo, 1989

- Uropod 3 not sexually dimorphic; accessory flagellum of antenna 1 longer than first article of main flagellum; basis of pereopod 7 with posterodistal lobe........................................................... P. daviui Jaume, 1991

5. Main flagellum of antenna 1 more than 20-articulate.......................................................... 6

- Flagellum less than 20-articulate......................................................................... 10

6. Flagellum of antenna 2 more than 11-articulate.............................................................. 7

- Flagellum of antenna 2 less than 11-articulate............................................................... 9

7. Accessory flagellum of antenna1 longer than first article of main flagellum........................................ 8

- Accessory flagellum of antenna1 shorter than (or equal to) first article of main flagellum...................................................................................................... P. longipes Coineau & Boutin, 1996

8. Main flagellum of antenna1 more than 30-articulate; coxal plate 4 markedly excavate............................................................................ P. longiflagellum Fakher-el-Abiari, Oulbaz, Messouli & Coineau, 1999

- Main flagellum of antenna1 less than 25-articulate; coxal plate 4 not markedly excavate......................................................................................................... P. ruffoi Coineau & Boutin, 1996

9. Coxal plate 4 markedly excavate; telson poorly notched........... P. duplus Messouli, Messana & Yacoubi-Khebiza, 2006

- Coxal plate 4 not markedly excavate; telson notch absent................................... P. pedrerae Pretus, 1990

10. Accessory flagellum of antenna 1 longer than first article of main flagellum...................................... 11

- Accessory flagellum of antenna 1 shorter than first article of main flagellum...................................... 15

11. Coxal plate 4 poorly excavate........................................................................... 12

- Coxal plate 4 markedly excavate........................................................................ 13

12. Pereopod 7 basis posterodistal lobe present; uropod 3 sexually dimorphic.................................................................................................. P. obritus Messouli, Messana & Yacoubi-Khebiza, 2006

- Pereopod 7 basis posterodistal lobe absent; uropod 3 not sexually dimorphic............................................................................................................. P. maroccanus Boutin & Coineau, 1988

13. Telson quadrangular; Pereopod 7 basis elongated................................. P. italicus Karaman & Ruffo, 1989

- Telson not quadrangular............................................................................... 14

14. Main flagellum of antenna 1 more than 15-articulate; flagellum of antenna 2 = 10-articulate................................................................................................ P. romanorum Coineau & Boutin, 1996

- Main flagellum of antenna 1 less than 15-articulate; flagellum of antenna 2 <10-articulate; telson notch marked................................................... P. beninensis Lagnika, Messouli, Ibikounlé, Sakiti, Boutin & Coineau, 2016

15. Basis of pereopod 7 wide.............................................................................. 16

- Basis of pereopod 7 slender............................................................................ 17

16. Basis of pereopod 7 without posterodistal lobe.............................................. P. triasi Jaume, 1991

- Basis of pereopod 7 with posterodistal lobe........................................... P. africanus Chevreux, 1901

17. Basis of pereopod 7 without posterodistal lobe............................................................. 18

- Basis of pereopod 7 with a posterodistal lobe.............................................................. 19

18 Main flagellum of antenna1 =18-articulate; coxa 4 excavated; telson markedly notched; uropod 3 sexually dimorphic....................................................................................... P. pityuensis Pretus, 1990

- Flagellum of antenna 1 =12-articulate; coxa 4 poorly excavated; telson notch not strongly marked; uropod 3 not sexually dimorphic....................................................................... P. racovitzai Pretus, 1990

19. Telson quadrangular........................................................... P. adriaticus S. Karaman, 1955

- Telson broad........................................................................................ 20

20. Telson notch marked..................................... P. planasiae Messouli, Messana & Yacoubi-Khebiza, 2006

- Telson notch poorly marked............................................................................ 21

21. Pereopod 7 propodus elongated (length/width>10)....................................... P. mercadali Pretus, 1988

- Pereopod 7 propodus not elongated (length/width <10)........................... P. inconditus Karaman & Ruffo, 1989