Nannosquilla

Albuquerque, Débora Lucatelli De & Coelho, Petrônio Alves, 2009, A new species of Nannosquilla (Stomatopoda: Nannosquillidae) from the Western Atlantic Ocean, Zootaxa 2289, pp. 55-60 : 58-59

Key of species of Nannosquilla from Atlantic Ocean (adapted from Camp & Manning, 1986)

1. Inner spine of uropodal protopod longer than outer spine............................................................................................ 2

- Inner spine of uropodal protopod shorter than or subequal to outer spine ................................................................. 10

2. Posterior margin of telson with a total of seven fixed teeth and denticles lateral to each movable submedian tooth...3

- Posterior margin of telson with a total of six or fewer fixed teeth and denticles lateral to each movable submedian tooth .............................................................................................................................................................................. 4

3. Rostral plate subrectangular. False eave of telson with acute median projection....................................... N. schmitti

- Rostral plate subpentagonal. False eave of telson with obtuse median projection......................... N. potiguara n. sp.

4. Base of movable submedian tooth of telson situated far anterior of outermost submedian denticle, at the level of or slightly behind anus ................................................................................................................................... N. hancocki

- Base of movable submedian tooth of telson situated adjacent to outermost submedian denticle, far behind anus...... 5

5. Dorsal antennular processes completely covered by rostral plate, not visible in dorsal view..................... N. vasquezi

- Dorsal antennular processes visible as anterior directed spine projection beyond sides of rostral plate ..................... 6

6. Posterior margin of telson with 11 or 12 fixed submedian denticles on either side of midline, entire row forming a ‘W’ in posterior view ...................................................................................................................................... N. taylori

- Posterior margin of telson with 10 or fewer (usually less than 9) fixed submedian denticles on either side of midline, entire row usually forming transverse line.................................................................................................................... 7

7. Telson greatly inflated. Inner spine of uropodal protopod more than 3 times as long as outer spine ........ N. taguensis

- Telson not greatly inflated. Inner spine of uropodal protopod less than 3 times as long as outer spine ...................... 8

8. Lateral margin of rostral plate broadly rounded, widely divergent anteriorly; anterolateral corners of plate broadly rounded. Posterolateral corners of sixth abdominal somite prolonged posteriorly as acute spines. Dactylus of rapto-

rial claw with 6 teeth................................................................................................................................... N. dacostai - Lateral margin of rostral plate slightly convex, not broadly rounded, slightly divergent anteriorly; anterolateral corners of plate slightly rounded, obtuse angles. Posterolateral corners of sixth abdominal somite acute angle, not prolonged posteriorly as an acute spines. Dactylus of raptorial claw with 11 or 12 teeth ................................................ 9 9. Ocular peduncles not visible. Telson with 5 teeth each side of submedian movable teeth .......................... N. whitingi

- Ocular peduncles visible. Telson with 6 teeth each side of submedian movable teeth ......................... N. candidensis

10. Anterolateral corner of rostral plate acute, sharply pointed angles ........................................................... N. antillensis

- Anterolateral corner of rostral plate subacute or rounded obtuse angles, not sharply pointed................................... 11

11. Posterior margin of telson with 4 fixed submedian denticles on either side of midline between movable submedian teeth................................................................................................................................................................ N. heardi

- Posterior margin of telson with 6 or 7 fixed submedian denticles on either side of midline between movable submedian teeth ................................................................................................................................................................ 12

12. Posterolateral corner of sixth abdominal somite rounded. Outer spine of uropodal protopod subequal in length to inner (outer spine longer in juveniles) ................................................................................................... N. carolinensis

- Posterolateral corner of sixth abdominal somite acute. Outer spine of uropodal protopod longer than inner ........... 13

13. Anterolateral corner of rostral plate subacute or slightly rounded right angle ........................................................... 14

- Anterolateral corner of rostral plate rounded, obtuse, not forming acute or rigtht angle ........................................... 15

14. Dorsal antennular processes extending beyond the anterolateral corner of the rostral plate. Antennal peduncle not extending beyond end of the cornea. Dactylus of raptorial claw with 8 teeth....................................... N. tobagoensis

- Dorsal antennular processes not extending beyond the anterolateral corner of the rostral plate. Antennal peduncle extending beyond the end of the cornea. Dactylus of raptorial claw with 7 teeth .................................... N. virginalis

15. Lateral margins of rostral plate broadly rounded. Dorsal antennular processes concealed from dorsal view by wide rostral plate....................................................................................................................................................... N. disca

- Lateral margins of rostral plate slightly convex, subparalellel. Dorsal antennular processes visible in dorsal view as anteriorly directed spines projecting beyond sides of rostral plate............................................................................. 16

16. Length of rostral plate about 3/4 (0.77) its width. Median projection of posterior margin of telson narrow................. .................................................................................................................................................................... N. adiksoni

- Length of rostral plate about 2/3 (0.67) its width. Median projection of posterior margin of telson broad ................... ................................................................................................................................................................. N. yucatanica