Tetraloides nigrifrons (Dana, 1852)

Sun, Yu-Li, Jiang, Wei & Sha, Zhong-Li, 2024, Shallow-water Trapezioidea (Decapoda: Brachyura) from the South China Sea, including two new records, and notes on Tetralia glaberrima Herbst, 1790, Zootaxa 5476 (1), pp. 393-423 : 405-407

Tetraloides nigrifrons (Dana, 1852)

( Fig. 6A–C )

Tetralia glaberrima nigrifrons Dana, 1852: 83 .

Tetraloides nigrifrons .— Galil 1986a: 72, figs. 1A, B.— Galil & Clark 1988: 149, figs. 1E, 3E, 4E, J, 5B, 6E.— Castro 1997a: 72, pl. 1F; 1997b: 115; 1999b: 104; 2003: 443; 2009: 279; 2011: 79 (list).— Castro et al. 2004: 32 , pl. 2B.—Castro & Titelius 2008: 323.— Ng et al. 2008: 184 (list).—Poupin & Juncker 2008: 34, fig. 15b.— Limviriyakul 2016: 4, fig. 4n, o.— Maenosono 2017: 48, fig. 2B, D, 10C, D, 11B (the Ryukyus).

Tetralia heterodactyla lissodactyla Serène 1984: 285 , fig. 189, pl. 42C.

Tetralia nigrifrons f. lissodactyla Serène & Pham, 1957: 118, fig. 3D–F, pl. 1.

Material examined. Nansha Islands: Mischief Reef, 115°32.5’E 9°55.7’N, 11 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 5 May 2022, 1 pre-adult (4.32 × 3.94 mm), NS-MJJ-2022-1099; 115°33.8’E 9°52.9’N, 8 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 9 May 2022, 1 male (8.57 × 8.32 mm), 1 female (10.26 × 8.59 mm), NS-MJ-2022-1672, in Acropora digitifera ( Acroporidae ); 1 pre-adult (2.47 × 2.02 mm), NS-MJ-2022-1678, in Acropora digitifera ( Acroporidae ); 115°34.4’E 9°53.5’N, 8 m, 11 May 2022, 3 juveniles (4.21 × 3.74 mm; 3.92 × 3.63 mm; 2.40 × 2.10 mm), NS-MJ-2022-1872. Fiery Cross Reef, 112°58.9’E 9°39.5’N, 3 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 13 May 2022, 1 pre-adult (3.45 × 3.21 mm), NS-YS-2022-1120; 1 male (7.71 × 6.86 mm), 1 female (8.70 × 7.39 mm), 2 pre-adults (3.37 × 3.18 mm; 2.47 × 2.17 mm), NS-YS-2022-1130; 113°0.8’E 9°39.9’N, 10 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 14 May 2022, 1 pre-adult (4.14 × 3.56 mm), NS-YS-2022-1286, in partially dead Acropora sp. ( Acroporidae ) reef.— Hainan Island: Xin Cun, coll. Xianqiu Ren, 21 December 2007, 1 male (7.02 × 6.21 mm), 3071. Jia Jing Dao, coll. Wei Jiang, 28 March 2018, 1 female (), 100-1036-1037. Found in Acropora sp. ( Acroporidae ) unless otherwise noted.

Geographical distribution. Across Indo-West Pacific region. Known from Johnston Atoll, not from the Hawaiian Islands ( Castro 2011).

Remarks. Both color patterns of Tetraloides nigrifrons previously reported ( Limviriyakul 2016) were recorded in the South China Sea this time (Fig, 6A, NS-YS-2022-1130; Fig. 6C , NS-MJ-2022-1672).

Figures

FIGURE 6. A, Tetraloides nigrifrons Dana, 1852, male (7.71 × 6.86 mm) (NS-YS-2022-1130), Nansha Islands, Fiery Cross Reef; B, Tetraloides nigrifrons, juvenile(4.21 × 3.74 mm) (NS-MJ-2022-1872), Nansha Islands, Mischief Reef; C, Tetraloides nigrifrons,male (all inblack)(8.57×8.32 mm)(NS-MJ-2022-1672),Nansha Islands,MischiefReef;D, Tetraloidesheterodactylus Heller, 1861, male (8.39 × 7.64 mm) (NS-MJJ-2022-1027), Nansha Islands, Mischief Reef; E, Tetralia nigrolineata Serène & Pham, 1957, ovigerous female (white pereiopods) (7.21 × 6.10 mm) (VX20230501), Hainan Island, Hou Hai; F, Tetralia nigrolineata, male (11.35 × 10.59 mm) (XY1102), Hainan Island, Hou Hai.