Chinommatia, 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 : 64

Key to species of Chinommatia n. gen.

1. Carapace, chelipeds, ambulatory legs covered with dense, stiff setae that obscure margins [Vanuatu]........ C. turpis n. sp.

- Carapace, chelipeds, ambulatory legs can be covered with low pubescence or scattered setae that never obscure margins or surface................................................................................................2

2. Anteroexternal angle of merus of third maxilliped with broad, auriculiform structure (e.g., Fig. 32 A).................. 3

- Anteroexternal angle of merus of third maxilliped not auriculiform (e.g., Fig. 32 E)................................. 4

3. Inner surface of minor male chela, at base of pollex, with large, swollen tooth ( Fig. 44 A, B). Ventral margin of ambulatory merus with small spines even in large individuals ( Fig. 44 F). Distal half of G1 distinctly curved ( Fig. 75 A) [ South China Sea ; Philippines]............................................................................... C. cavimanus

- Inner surface of minor male chela, at base of pollex, with distinct bilobed tooth ( Fig. 44 C, D). Ventral margin of ambulatory merus with prominent spines in large individuals ( Fig. 44 H). Distal half of G1 relatively straight ( Fig. 75 J) [Papua New Guinea; Fiji].......................................................................... C. bicuspida n. sp.

4. Carapace relatively quadrate ( Fig. 14 G–J). G1 relatively stout, tip can be flared ( Fig. 75 E, G). Long, slender ambulatory legs ( Fig. 14 G–J) [? Philippines; Malaysia (Sarawak); Indonesia]............................................ C. bruuni

- Carapace ovate with anterolateral margins arcuate ( Fig. 15 A). G1 not known. Relatively short, stout ambulatory legs ( Fig. 15 A; Tesch 1918: pl. 9, fig. 3) [ Indonesia]........................................................ C. littoralis

Figures

FIGURE 14. Overall dorsal view of species of Chinommatia n. gen. A, C. cavimanus, Philippines: holotype male 11.4 × 13.9 mm (USNM 46413); B, C. cavimanus, Philippines: male 10.1 × 12.2 mm (ZRC 2015.228); C, C. cavimanus, Philippines: female 7.6 × 9.0 mm (ZRC 2015.225); D, C. cavimanus, Philippines: male 8.1 × 10.2 mm (ZRC 2015.228); E, C. cavimanus, Philippines: female 7.4 × 8.6 mm (ZRC 2015.227); F, South China Sea: male 6.1 × 7.3 mm (IOCAS-MBM 166773); G, C. bruuni, Vietnam: holotype female 4.0 × 5.0 mm (after Serène 1964: pl. 22 B); H, C. bruuni, Indonesia: male 3.4 × 4.0 mm (ZMUC CRU- 1524); I, C. bruuni, Malaysia: male 4.3 × 5.5 mm (ZRC 2013.0020); J, C. bruuni, Malaysia: female 5.5 × 7.2 mm (ZRC 2013.0020).

FIGURE 15. Overall dorsal view of species of Chinommatia n. gen. and Notopelta n. gen. A, Chinommatia littoralis, Indonesia: holotype female 3.5 × 4.9 mm (NNM-ZMA); B, Chinommatia bicuspida n. sp., Papua New Guinea: holotype male 10.7 × 12.9 mm (MNHN-IU- 2011 - 0954); C, Chinommatia bicuspida n. sp., Fiji: male 12.7 × 10.6 mm (MNHN-IU- 2013 - 9056); D, Chinommatia bicuspida n. sp., Papua New Guinea: paratype female 16.7 × 20.4 mm (MNHN-IU- 2011 - 3461); E, F, Chinommatia turpis n. sp., Vanuatu: holotype male 3.1 × 4.3 mm (MNHU-IU- 2013 - 9044); G, H, Notopelta mortenseni, Indonesia: holotype male 5.0 × 6.9 mm (ZMUC CRU- 7397); I, Notopelta mortenseni, Indonesia: female 5.9 × 4.1 mm (ZMUC CRU- 007768).

FIGURE 32. Third maxilliped of species of Chinommatia n. gen. A, C. cavimanus, Philippines: male 10.1 × 12.2 mm (ZRC 2015.228); B, C. bruuni, Indonesia: male 3.4 × 4.0 mm (ZMUC CRU- 1524); C, C. littoralis, Indonesia: holotype female 3.5 × 4.9 mm (NNM-ZMA); D, C. bicuspida n. sp., Papua New Guinea: paratype female 16.7 × 20.4 mm (MNHN-IU- 2011 - 3461); E, C. turpis n. sp., Vanuatu: holotype male 3.1 × 4.3 mm (MNHU-IU- 2013 - 9044); F, Notopelta mortenseni, Indonesia: holotype male 5.0 × 6.9 mm (ZMUC CRU- 7397). Scale = 0.5 mm.

FIGURE 44. Chela and ambulatory leg of species of Chinommatia n. gen. A, F, C. cavimanus, Philippines: male 10.4 × 12.3 mm (ZRC 2015.227); B, E, C. cavimanus, Philippines: male 10.1 × 12.2 mm (ZRC 2015.228); C, D, G, C. bicuspida n. sp., Fiji: male 10.6 × 12.7 mm (MNHN-IU- 2013 - 9056); H, C. bicuspida n. sp., Papua New Guinea: paratype female 16.7 × 20.4 mm (MNHN-IU- 2011 - 3461). A ‒ D, ventral view of minor chela; E ‒ H, dorsal view of left P 3.

FIGURE 75. Gonopods of species of Chinommatia n. gen. A ‒ D, C. cavimanus, Philippines: male 10.1 × 12.2 mm (ZRC 2015.228); E ‒ H, C. bruuni, Java Sea: male 3.4 × 4.0 mm (ZMUC CRU- 1524); I, C. bruuni, Malaysia: male 4.3 × 5.5 mm (ZRC 2013.0020); J ‒ M, C. bicuspida n. sp., Papua New Guinea: holotype male 10.7 × 12.9 mm (MNHN-IU- 2011 - 0954). A, E, I, J, ventral view of left G 1; B, F, K, ventral view of distal part of left G 1; C, G, L, dorsal view of distal part of left G 1; D, H, M, left G 2. Scales: A, D, E, H, I, J, M = 0.5 mm; B, C, F, G, K, L = 0.1 mm.