Plesionika

Cardoso, Irene A., 2011, New species of Plesionika Bate, 1888 (Crustacea, Decapoda, Pandalidae) from Southwestern Atlantic, Zootaxa 3089, pp. 51-59 : 58

Key to Southwestern Atlantic species of Plesionika

1. Rostrum relatively short, maximum length 1.5 (mean) times carapace............................................ 2

- Rostrum relatively long, more than 1.5 (mean) times carapace.................................................. 4

2. Rostrum dorsal margin distally unarmed............................................... P. macropoda Chace 1939

- Rostrum dorsal margin with teeth in all length............................................................... 3

3. Rostrum from once to 1.5 times carapace length.......................................... P. gigliolii (Senna 1903)

- Rostrum less than once to once carapace length....................................... P. acanthonotus (Smith 1882)

4. Epipods absent or reduced in at least two pereopods.......................................................... 5

- Epipods on pereopods 1–4 well developed................................................................. 7

5. Epipods absent on all pereopods................................................... P. longicauda (Rathbun 1901)

- Epipods reduced on pereopods 3 and 4.................................................................... 6

6. Rostrum dorsal margin with 9–11 teeth and ventral margin with 23–25 teeth........................... P. revizeei n. sp.

- Rostrum dorsal margin with 28–34 teeth and ventral margin with 33–50 teeth................ P. edwardsii (Brandt 1851)

7. Rostrum dorsal margin armed only on basal region........................................................... 8

- Rostrum dorsal margin armed on all length................................................................. 9

8. Rostrum around twice carapace length, dorsal basal teeth closely settled.............. P. martia (A. Milne Edwards 1881)

- Rostrum more than twice times carapace length, dorsal basal teeth widely settled......... P. ensis (A. Milne Edwards 1881)

9. Rostrum dorsal teeth widely settled.............................................. P. miles A. Milne Edwards 1883

- Rostrum dorsal teeth closely settled on distal third............................... P. longipes (A. Milne Edwards 1881)