Sophrosyne, Stebbing, 1888

Lowry, J. K. & Stoddart, H. E., 2010, Sophrosynidae, a new family in the Lysianassoidea (Crustacea: Amphipoda) with a revision of the genus Sophrosyne, Zootaxa 2370 (1), pp. 1-35 : 5

Key to species of Sophrosyne

1. Epimeron 3, posteroventral corner rounded ............................................................................................................... 2

- Epimeron 3, posteroventral corner angled .................................................................................................................. 7

2. Telson entire .......................................................................................................................................... S. integricauda

- Telson cleft .................................................................................................................................................................. 3

3. Gnathopod 2 palm large ................................................................................................................................ S. peartae

- Gnathopod 2 palm small ............................................................................................................................................. 4

4. Mandibular palp article 2 with D2-setae ..................................................................................................................... 5

- Mandibular palp article 2 without D2-setae ............................................................................................................... 6

5. Mandibular palp article 3 with D3-setae; uropod 2 without robust setae on rami .................................. S. californica

- Mandibular palp article 3 without D3-setae; uropod 2 with robust setae on at least one ramus .............. S. cantractia

6. Gnathopod 2 palm convex; pereopod 6 coxa slightly lobate posteriorly ................................................. S. robertsoni

- Gnathopod 2 palm concave; pereopod 6 coxa not lobate posteriorly ....................................................... S. antarctica

7. Gnathopod 2 palm large ............................................................................................................................... S. murrayi

- Gnathopod 2 palm small ............................................................................................................................................. 8

8. Pereopod 7, basis posteroventral lobe extending beyond ischium ............................................................................. 9

- Pereopod 7, basis posteroventral lobe not extending beyond ischium ..................................................................... 10

9. Maxilliped palp article 2 broad; pereopod 6 coxa strongly lobate posteriorly ............................................ S. hispana

- Maxilliped palp article 2 slender; pereopod 6 coxa slightly lobate posteriorly ........................................... S. rodondo

10. Pereopod 6 coxa strongly lobate posteriorly ............................................................................................................. 11

- Pereopod 6 coxa slightly lobate posteriorly .............................................................................................................. 13

11. Mandible palp article 2 broadened distally .................................................................................................. S. ledoyeri

- Mandible palp article 2 slender ................................................................................................................................. 12

12. Mandible palp articles 2 and 3 with D-setae; telson longer than broad .................................................... S. inverarae

- Mandible palp articles 2 and 3 without D-setae; telson about as long as broad .............................................. S. ruffoi

13. Maxilliped palp article 2 slender (length about 2.4 x breadth); telson moderately cleft (about 38%) .......... S. moorei

- Maxilliped palp article 2 broad (length about 1.8 x breadth); telson deeply cleft (about 67%) ..................... S. abyssi