Statommatia, Ng, Peter K. L. & Castro, Peter, 2016

Ng, Peter K. L. & Castro, Peter, 2016, Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea), Zootaxa 4209 (1), pp. 1-182 : 73

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.

Figures

FIGURE 16. Overall dorsal view, chela, ambulatory legs and pleon of species of Statommatia n. gen. A, S. apta, Philippines: holotype male 7.8 × 9.4 mm (USNM 46839); B, S. apta, Philippines: male 5.9 × 7.1 mm (ZRC 2015.239); C, S. apta, Philippines: female 8.5 × 10.6 mm (ZRC 2015.238); D, S. knudseni, New Caledonia: holotype male 4.7 × 6.9 mm (ZMUC CRU- 6974); E, S. malagasy n. sp., Madagascar: holotype male 9.9 × 12.4 mm (MNHN-IU- 2010 - 4370 a); F, S. malagasy n. sp., Madagascar: paratype female 9.4 × 8.1 mm (ZRC 2015.215); G, S. pubescens, South China Sea: holotype male 5.0 × 7.9 mm (after Chen 1998: fig. 23 - 1 ‒ 4, 6); H, S. granulosa n. sp., New Caledonia: holotype male 4.1 × 4.7 mm (MNHN-IU- 2013 - 9454).

FIGURE 26. Frontal view of species of Statommatia n. gen. and Tenagopelta n. gen. A, Statommatia apta, Philippines: holotype 7.8 × 9.4 mm (USNM 46389); B, Statommatia apta, Philippines: male 5.9 × 7.1 mm (ZRC 2015.239); C, Statommatia malagasy n. sp., Madagascar: holotype male 9.9 × 12.4 mm (MNHN-IU- 2010 - 4370 a); D, Statommatia knudseni, New Caledonia: holotype male 4.7 × 6.9 mm (ZMUC CRU- 6974); E, Statommatia granulosa n. sp., New Caledonia: holotype male 4.1 × 4.7 mm (MNHN-IU- 2013 - 9454); F, Tenagopelta pacifica n. sp., Philippines: holotype male 10.3 × 11.9 mm (NMCR); G, Tenagopelta brachyphallus n. sp., Australia: holotype male 6.1 × 6.9 mm (NMV J 61680); H, Tenagopelta potens, Papua New Guinea: male 11.8 × 13.8 mm (MNHN-IU- 2011 - 1504).

FIGURE 33. Third maxilliped of species of Statommatia n. gen. and Tenagopelta n. gen. A, Statommatia apta, Philippines: holotype male 7.8 × 9.4 mm (USNM 46389); B, Statommatia apta, Philippines: male 5.9 × 7.1 mm (ZRC 2015.239); C, Statommatia knudseni, New Caledonia: holotype male 4.7 × 6.9 mm (ZMUC CRU- 6974); D, Statommatia pubescens, South China Sea: holotype male 5.0 × 7.9 mm (after Chen 1998: fig. 23 - 5); E, Statommatia malagasy n. sp., Madagascar: holotype male 9.9 × 12.4 mm (MNHN-IU- 2010 - 4370 a); F, Statommatia granulosa n. sp., New Caledonia: holotype male 4.1 × 4.7 mm (MNHN-IU- 2013 - 9454); G, Tenagopelta pacifica n. sp., Philippines: holotype male 10.3 × 11.9 mm (NMCR); H, Tenagopelta brachyphallus n. sp., Australia: holotype male 6.1 × 6.9 mm (NMV J 61680); I, Tenagopelta potens, Papua New Guinea: male 11.8 × 13.8 mm (MNHN-IU- 2011 - 1504).

FIGURE 77. Gonopods of species of Statommatia n. gen. A ‒ D, S. apta, Philippines: male 5.9 × 7.1 mm (ZRC 2015.239); E ‒ H, S. knudseni, New Caledonia: holotype male 4.7 × 6.9 mm (ZMUC CRU- 6974); I ‒ L, S. malagasy n. sp., Madagascar: holotype male 9.9 × 12.4 mm (MNHN-IU- 2010 - 4370 a). A ‒ C, ventral view of right G 1 [left one damaged]; E, I, ventral view of left G 1; B, dorsal view of distal part of right G 1; C, ventral view of distal part of right G 1; F, J, ventral view of distal part of left G 1; G, K, dorsal view of distal part of left G 1; D, H, L, left G 2. Scales: A, D, E, H, I, L = 0.5 mm; B, C, F, G, J, K = 0.1 mm.

FIGURE 78. Gonopods of species of Statommatia n. gen. A, B, S. pubescens, South China Sea: holotype male 5.0 × 7.9 mm (after Chen 1998: fig. 23 - 7); C ‒ G, S. granulosa n. sp., New Caledonia: holotype male 4.1 × 4.7 mm (MNHN-IU- 2013 - 9454). A, C, ventral view of left G 1; D, dorsal view of left G 1; B, E, ventral view of distal part of left G 1; F, dorsal view of distal part of left G 1; G, left G 2. Scales = 0.1 mm.