Tryphosella, Bonnier, 1893

Lowry, J. K. & Stoddart, H. E., 2011, The tryphosine genera Photosella gen. nov. and Tryphosella Bonnier, 1893 (Crustacea: Amphipoda: Lysianassoidea: Lysianassidae: Tryphosinae) in Australian waters 2956, Zootaxa 2956 (1), pp. 1-76 : 17

Key to Australasian species of Tryphosella

1. Gnathopod 1 ischium long (length 2 or more x breadth)....................................................... 2

- Gnathopod 1 ischium short (length less than 2 x breadth)...................................................... 6

2. Uropod 2 inner ramus incised....................................................................... T. ama

- Uropod 2 inner ramus not incised........................................................................ 3

3. Antenna 1 with robust setae on proximal articles............................................................. 4

- Antenna 1 without robust setae on proximal articles.................................................. T. seasana

4. Gnathopod 2 palm transverse..................................................................... T. bicheno

- Gnathopod 2 palm obtuse............................................................................... 5

5. Maxilliped outer plate with 1 long apical robust seta.................................................. T. wongada

- Maxilliped outer plate with 3 long apical robust setae............................................. T. astrolabensis

6. Gnathopod 1 basis anterior margin densely setose........................................................... 7

- Gnathopod 1 basis anterior margin moderately or weakly setose................................................. 9

7. Antenna 1 flagellum with robust setae on proximal articles.................................................... 8

- Antenna 1 flagellum without robust setae on proximal articles.......................................... T. rodondo

8. Maxilliped outer plate with 2 long apical robust setae; uropod 3 peduncle with 2 short apicomedial robust setae..... T. cooee

- Maxilliped outer plate with 3 long apical robust setae; uropod 3 peduncle with 3 short apicomedial robust setae.. T. chinchilla

9. Gnathopod 2 palm transverse........................................................................... 10

- Gnathopod 2 palm obtuse.............................................................................. 12

10. Uropods 1 and 2 outer ramus with all robust setae stout and striated; uropod 3 peduncle with 1 short apicomedial robust seta............................................................................................... T. sorell

- Uropods 1 and 2 outer ramus with only distal robust setae stout and striated; uropod 3 peduncle with 2 short apicomedial robust setae........................................................................................ 11

11. Maxilliped outer plate with 3 apical robust setae; coxa 1 small (length about 1.1 x breadth); telson with 2 apical robust setae on each lobe................................................................................... T. fortescue

- Maxilliped outer plate with 2 apical robust setae; coxa 1 medium (length about 1.5 x breadth); telson with 1 apical robust seta on each lobe............................................................................... T. tuckanarra

12. Telson without dorsal robust setae................................................................... T. oupi

- Telson with dorsal robust setae.......................................................................... 13

13. Uropods 1 and 2 outer ramus with some or all robust setae stout and striated...................................... 14

- Uropods 1 and 2 outer ramus without stout, striated robust setae................................................ 16

14. Uropods 1 and 2 outer ramus with all robust setae stout and striated...................................... T. freycinet

- Uropods 1 and 2 outer ramus with only distal robust setae stout and striated...................................... 15

15. Epistome produced beyond upper lip; gnathopod 1 carpus subequal to propodus; epimeron 3 posteroventral corner narrowly rounded....................................................................................... T. orana

- Epistome produced equally with upper lip; gnathopod 1 carpus longer than propodus; epimeron 3 posteroventral corner subquadrate...................................................................................... T. tathra

16. Telson with 1 apical robust seta on each lobe.............................................................. 17

- Telson with 2 apical robust setae on each lobe..................................................... T. toowoomba

17. Coxa 1 small (length less than 1.5 x breadth)............................................................... 18

- Coxa 1 medium size (length at least 1.5 x breadth).......................................................... 19

18. Maxilliped outer plate with 1 long apical robust seta.................................................... T. betka

- Maxilliped outer plate with 1 short apical robust seta............................................... T. martrudan

19. Epimeron 3 posteroventral corner subquadrate............................................................. 20

- Epimeron 3 posteroventral corner acutely produced......................................................... 21

20. Maxilliped outer plate with 2 apical robust setae; boss on urosomite 1 laterally robust........................ T. camela

- Maxilliped outer plate with 3 apical robust setae; boss on urosomite 1 laterally very thin.................. T. cameloides

21. Maxilliped outer plate with 2 long apical robust setae....................................................... 22

- Maxilliped outer plate with 1 short apical robust seta............................................... T. wangaratta

22. Antenna 1 with robust setae on proximal articles; uropod 3 peduncle with 1 short apicomedial robust seta........... T. bet

- Antenna 1 without robust setae on proximal articles; uropod 3 peduncle with 2 short apicomedial robust setae.... T. flynnana