Bragasellus Henry & Magniez, 1968

López, Eduardo, 2020, A new species of Bragasellus (Isopoda, Asellidae) from NW Spain, with a key to the known species of the genus, Zootaxa 4861 (2), pp. 257-269 : 266-267

Key to the species of Bragasellus Henry & Magniez, 1968

1. Appendix masculina (male pleopod II endopod) without developed cannula, genital duct formed by the apex of appendix masculina …........................................................................................... 2

- Cannula well developed and distinct from the apex of appendix masculina, emerging from a subdistal or central position... 5

2. Apex of appendix masculina forming a short and wide, cup-shaped duct......................................... 3

- Apex of appendix masculina cylindrical, more or less elongated................................................ 4

3. Body dark pigmented; appendix masculina bearing a basal process and shorter than corresponding exopod.............................................................................................. B. peltatus ( Braga, 1944) .

- Body unpigmented; appendix masculina bearing two basal processes.................. B. conimbricensis ( Braga, 1946)

4. Appendix masculina bearing two short basal processes and an elongated duct (half as long as the rest of the article); anterior margin of head convex............................................................ B. pauloae ( Braga, 1958)

- Appendix masculina bearing a single large basal process and a short duct; anterior margin of head distinctly concave.................................................................................... B. frontellum ( Braga, 1964)

5. Cannula directed oblique or perpendicularly to the main axis of the appendix masculina............................. 6

- Cannula straight and parallel to the main axis of the appendix masculina........................................ 14

6. Cannula short and bent in approximately square angle to the main axis of the appendix masculina..................... 7

- Cannula long and coiled.............................................................................. 10

7. Cannula directed internally ......................................................... B. incurvatus Afonso, 1984

- Cannula directed externally, pointing to corresponding exopod................................................. 8

8. Cannula originating subdistally from appendix masculina........................ B. meijersae Henry & Magniez, 1988

- Cannula originating from middle region of appendix masculina................................................ 9

9. Male pleopod II exopod bearing smooth distal setae, protopod without setae........... B. bragai Henry & Magniez, 1988

- Male pleopod II exopod bearing plumose distal setae, protopod with two setae on internal margin.............................................................................................. B. escolai Henry & Magniez, 1978

10. Proximal part of coiled cannula inflated to make a spermatic vesicle................. B. rouchi Henry & Magniez, 1988

- Cannula without such inflated region ..................................................................... 11

11. Two basal processes in appendix masculina ................................................................ 12

- A single basal process in appendix masculina.............................................................. 13

12. Cannula clearly shorter than appendix masculina, male pleopod II exopod and appendix masculina similar in size.................................................................................. B. aireyi Henry & Magniez, 1980

- Cannula similar in length to appendix masculina, male pleopod II exopod much shorter..................................................................................................... B. afonsae Henry & Magniez, 1988

13. Male pleopod II protopod bearing a conspicuous knob in the middle of its external margin, exopod with at least six apical setae................................................................ B. comasioides Magniez & Bréhier, 2004

- Male pleopod II protopod without such knob, exopod with a couple of apical setae..... B. comasi Henry & Magniez, 1976

14. Body unpigmented; appendix masculina with one or two basal processes........................................ 15

- Body dark pigmented; appendix masculina without basal process.............................................. 20

15. A single basal process in appendix masculina.............................................................. 16

- Two basal processes in appendix masculina............................................................... 17

16. Cannula short and cylindrical........................................... B. notenboomi Henry & Magniez, 1988

- Cannula long and tapering........................................................... B. seabrai ( Braga, 1943)

17. Cannula short and barely projecting beyond distal margin of appendix masculina................................. 18

- Cannula long or mid-sized but clearly projecting beyond distal margin of appendix masculina....................... 19

18. Cannula inserted subdistally in the midline of appendix masculina, corresponding exopod with a single seta on external margin.............................................................. Bragasellus lagari Henry & Magniez, 1973

- Cannula inserted subdistally in the inner margin of appendix masculina, corresponding exopod with several setae on external margin …........................................ Bragasellus lagarioides Henry & Magniez in Afonso et al. 1996

19. Cannula long; male pleopod II protopod bearing two spines on inner margin, exopod with three setae on outer margin of basal article and two plumose setae on apex of distal article.................... Bragasellus molinai Henry & Magniez, 1988

- Cannula mid-sized; male pleopod II protopod without setae on inner margin, exopod with a single seta on outer margin of basal article and 4–5 plumose setae on apex of distal article...................... Bragasellus stocki Henry & Magniez, 1988

20. Pereopod I dactylus shorter than the palm of propodus; pleopod I exopod with smooth marginal setae; male pleopod II exopod with a clear gap between marginal and distal setae............................................. B. oscari sp. nov.

- Pereopod I dactylus longer than the palm of propodus; pleopod I exopod with plumose marginal setae; male pleopod II exopod marginal and distal setae arranged without gap............................................ B. cortesi Afonso, 1989