Hephthopelta

Ng, Peter K. L. & Castro, Peter, 2016, Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea), Zootaxa 4209 (1), pp. 1-182 : 52

Key to species of Hephthopelta

1. Posterior margin of epistome truncate ( Fig. 24 A). Ischium, merus of third maxilliped proportionately short, more quadrate ( Fig. 31 A, B). Ambulatory meri relatively short ( Fig. 10 A, D–H). G1 with distal half relatively longer, slender, gently directed upwards ( Fig. 71 A–D, F–L) [Andaman Sea; Western Australia; Papua New Guinea; New Caledonia; Solomon Islands ; Fiji]............................................................................................. H. lugubris

- Posterior margin of epistome broadly triangular ( Fig. 24 B). Ischium, merus of third maxilliped proportionately long ( Fig. 31 C). Ambulatory meri relatively longer ( Fig. 10 I). G1 with distal half relatively shorter, stouter, directed obliquely laterally ( Fig. 72 A–C) [ Madagascar]............................................................ H. occidentalis n. sp.

Figures

FIGURE 10. Overall dorsal view, frontal view and anterior thoracic sternum of species of Hephthopelta. A ‒ C, H. lugubris, Andaman Sea: female (after Alcock 1899 b: pl. 14 fig. 2, 2 a. 2 b); D, H. lugubris, Australia: male 7.9 × 8.3 mm (NMV J 61081); E, H. lugubris, Australia: ovigerous female 6.3 × 6.6 mm (NMV J 61083); F, H. lugubris, Solomon Is: male 8.3 × 9.1 mm (MNHN-IU- 2013 - 9040); G, H. lugubris, Solomon Is.: male 7.3 × 7.8 mm (MNHN-IU- 2013 - 9037); H, H. lugubris, Fiji: male 6.3 × 6.5 mm (MNHN-IU- 2013 - 9028); I, H. occidentalis n. sp., Madagascar: holotype male 6.1 × 6.6 mm with sacculinid (MNHN-IU- 2010 - 1031); J, H. occidentalis n. sp., Madagascar: paratype male 4.7 × 4.9 mm (ZRC 2015.247).

FIGURE 24. Frontal view of species of Hephthopelta and Angustopelta n. gen. A, Hephthopelta lugubris, Australia: male 7.9 × 8.3 mm (NMV J 61081); B, Hephthopelta occidentalis n. sp., Madagascar: holotype male 6.1 × 6.6 mm with sacculinid (MNHN-IU- 2010 - 1031); C, Angustopelta aurita, Philippines: holotype female 18.9 × 19.1 mm (USNM 46405); D, Angustopelta aurita, Philippines: male 9.2 × 10.6 mm (ZRC 2015.251); E, Angustopelta cribrorum, Japan: holotype male 13.6 × 14.9 mm (USNM 46388); F, Angustopelta robusta n. sp., Vanuatu: holotype male 9.3 × 10.7 mm (MNHN-IU- 2010 - 5616); G, Angustopelta modesta n. sp., Solomon Islands: holotype male 13.3 × 15.1 mm (MNHU-IU- 2013 - 9038); H, Angustopelta aff. modesta n. sp., Papua New Guinea: female 9.0 × 10.2 mm (ZRC 2015.259).

FIGURE 31. Third maxilliped of species of Hephthopelta and Angustopelta n. gen. A, B, Hephthopelta lugubris, Australia: male 7.9 × 8.3 mm (NMV J 61081); C, Hephthopelta occidentalis n. sp., Madagascar: holotype male 6.1 × 6.6 mm with sacculinid (MNHN-IU- 2010 - 1031); D, Angustopelta aurita, Philippines: holotype female 18.9 × 19.1 mm (USNM 46405); E, Angustopelta aurita, Philippines: male 9.2 × 10.6 mm (ZRC 2015.250); F, Angustopelta cribrorum, Japan: holotype male 13.6 × 14.9 mm (USNM 46388); G, Angustopelta robusta n. sp., Vanuatu: holotype male 9.3 × 10.7 mm (MNHN-IU- 2010 - 5616); H, Angustopelta modesta n. sp., Solomon Islands: holotype male 13.3 × 15.1 mm (MNHU-IU- 2013 - 9038); I, Angustopelta modesta n. sp., Solomon Islands: paratype male 11.5 × 13.2 mm (MNHU-IU- 2013 - 9039).

FIGURE 71. Gonopods of Hephthopelta lugubris. A ‒ E, Australia: male 7.9 × 8.3 mm (NMV J 61081); F ‒ I, Solomon Is: male 8.3 × 9.1 mm (MNHN-IU- 2013 - 9040); J, Solomon Is: male 7.3 × 7.8 mm (MNHN-IU- 2013 - 9037); K ‒ M, Fiji: male 6.3 × 6.5 mm (MNHN-IU- 2013 - 9028). A, B, F, J, K, ventral view of left G 1; C, H, ventral view of distal part of left G 1; D, I, dorsal view of distal part of left G 1; E, M, left G 2; G, L, dorsal view of left G 1. Scales: A, B, E, F, G, J ‒ M = 0.5 mm; C, D, H, I = 0.1 mm.

FIGURE 72. Gonopods of Hephthopelta occidentalis n. sp. A ‒ D, Madagascar: holotype male 6.1 × 6.6 mm (MNHN-IU- 2010 - 1031). A, ventral view of left G 1; B, ventral view of distal part of left G 1; C, dorsal view of distal part of left G 1; D, left G 2. Scales: A, D = 0.5 mm; B, C = 0.1 mm.