Oratosquillina Manning, 1995

Ahyong, Shane T. & Chan, Tin-Yam, 2008, A new species of Oratosquillina Manning, 1995 (Crustacea: Stomatopoda: Squillidae) from the Indo-West Pacific region with a key to the genus, Zootaxa 1775, pp. 61-68 : 66-67

Key to species of Oratosquillina Manning, 1995

1. Telson with supplementary dorsolateral carinae...........................................................................................2

- Telson lacking supplementary dorsolateral carinae......................................................................................4

2. Telson with bicarinate accessory median carina. Dorsum of body surface rugose......................................3

- Telson without accessory median carina. Dorsal of body surface smooth ..................................................... .......................................................................................................................... O. berentsae Ahyong, 2001

3. Mandibular palp present. Raptorial claw dactylus with 6 teeth...................................................................... ...................................................................................................... O. microps (Manning & Garcia, 1982)

- Mandibular palp absent. Raptorial claw dactylus with 5 teeth....................................................................... ................................................................................................. O. manningi Ahyong, Chan & Liao, 2000

4. Raptorial claw dactylus with 5 teeth.............................................................................................................5

- Raptorial claw dactylus with 6 teeth.............................................................................................................7

5. TS5 with posterior lobe of lateral process with blunt apex. AS 1–2 with lateral carinae unarmed posteriorly......................................................................................................................................................................6

- TS5 with posterior lobe of lateral process with sharp apex. AS 2 or AS 1–2 with lateral carinae armed pos- teriorly..................................................................................................... O. pentadactyla ( Manning, 1978)

6. TS6 with anterior lobe of lateral process broad basally, trapezoid or subquadrate, apex blunt ..................... ............................................................................................................... O. quinquedentata ( Brooks, 1886)

- TS6 with anterior lobe of lateral process slender, digitiform. ....................................... O. nordica sp. nov.

7. Raptorial claw with dorsal carina of carpus entire.......................................................................................9

- Raptorial claw with dorsal carina of carpus divided or tuberculate.............................................................8

8. Submedian carinae of AS 4 unarmed posteriorly. Lobe on outer margin of inner spine of uropodal proto- pod with straight or convex margin. Rostral plate without median carina...... O. interrupta (Kemp, 1911)

- Submedian carinae of AS 4 armed posteriorly. Lobe on outer margin of inner spine of uropodal protopod with concave margin. Rostral plate with median carina................................. O. asiatica ( Manning, 1978)

9. Carapace with branches of anterior bifurcation of median carina absent. Lobe on outer margin of inner spine of uropodal protopod usually with straight or slightly concave margin, occasionally distinctly con- cave .......................................................................................................... O. stephensoni ( Manning, 1978)

- Carapace with branches of anterior bifurcation of median carina present.................................................10

10. Dorsal processes of A1 somite with blunt, rounded apices (viewed laterally). Dorsum finely pitted, not distinctly rugose. TS6 lateral process with anterior lobe quadriform or slender, not triangular................11

- Dorsal processes of A1 somite usually with sharp or angular apices (viewed laterally). Dorsum distinctly rugose and pitted, often with eroded appearance. TS6 lateral process with anterior lobe trianguloid.......12

11. Rostral plate square, appearing short. Raptorial claw propodus with blunt, distal projection on extensor margin ............................................................................................................. O. anomala (Tweedie, 1935)

- Rostral plate rectangular, appearing elongated. Raptorial claw propodus without blunt, distal projection on extensor margin .................................................................................................... O. inornata ( Tate, 1883)

12. Rostral plate square, appearing short................................................................. O. perpensa (Kemp, 1911)

- Rostral plate rectangular, appearing elongated............................................... O. gravieri ( Manning, 1978)