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)....................................... P. mercadali Pretus, 1988 - Pereopod 7 propodus not elongated (length/width <10)........................... P. inconditus Karaman & Ruffo, 1989

Published as part of Dole-Olivier, Marie-Jose, Hafid, Hinda & Piscart, Christophe, 2018, A new groundwater species of Pseudoniphargus (Amphipoda: Pseudoniphargidae) fromAlgeria, pp. 125-139 in Zootaxa 4482 (1) on pages 137-138, DOI: 10.11646/zootaxa.4482.1.5, http://zenodo.org/record/1440508