Key to species of Statommatia n. gen.

1. Carapace conspicuously broad, width to length ratio 1.3–1.4 (Fig. 16 D). Ambulatory meri relatively stout, broad (Fig. 16 D). P2 merus with few pointed tubercles [New Caledonia]............................................... S. knudseni

- Carapace not conspicuously broad, width to length ratio 1.1–1.3 (e.g., Fig. 16 A). Ambulatory meri relatively long, slender (e.g., Fig. 16 A). P2 merus unarmed...................................................................... 2

2. Carapace, outer surface of chelae covered with numerous small granules (e.g. Fig. 26 E). Ambulatory legs relatively short (e.g. Fig. 16 H)........................................................................................... 3

- Carapace, outer surface of chelae smooth or only with scattered small granules (e.g., Fig. 26 A). Ambulatory legs relatively long (e.g. Fig. 16 A)................................................................................... 4

3. Anteroexternal angle of merus of third maxilliped auriculiform (Fig. 33 F). G1 distal half short, stout, gently curbing upwards (Fig. 78 C–F) [New Caledonia]............................................................. S. granulosa n. sp.

- Anteroexternal angle of merus of third maxilliped rounded, not auriculiform (Fig. 33 D). G1 distal half conspicuously slender, distinctly curving laterally (Fig. 78 A, B) [South China Sea]......................................... .. S. pubescens

4. G1 with distal half relatively stout, straight, gradually tapering to subtruncate tip (Fig. 77 A–C) [Philippines; Papua New Guinea]........................................................................................ S. apta

- G1 distal half slender, strongly tapering, gently curving upwards (Fig. 77 I–K) [Madagascar]............ S. malagasy n. sp.