Trapezia septata 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 : 414

Trapezia septata Dana, 1852

( Fig. 9D )

Trapezia septata Dana, 1852: 260 .— Galil & Lewinsohn 1985: 288, figs. 2, 5, 6.— Castro 1997a: 90, pls. 2E, 6; 1999a: 54; 2002: 364; 2009: 275, figs. 2C.— Castro et al. 2004: 53 .— Liu et al. 2008: 792 (list) (Hainan Island, Taiwan Island, the Xisha Islands).— Higashiji 2013: 85, fig. 2C (Ryukyu Islands).— Limviriyakul 2016: 5, fig. 4s ( Taiwan Island).— Boyko 2017: 491 , fig. 1E (Easter Island).

Trapezia areolata .— Heller, 1865: 25; Kossmann, 1877: 44.—De Man, 1887: 317. —Henderson, 1893: 366.—Ortmann, 1893: 485 (part).—De Man, 1895: 556.—De Man, 1903: 640.—Miyake, 1936: 509.—Estampador, 1937: 531.—Ward, 1939: 12.—Serene, 1969: 147 (in key).—Garth, 1971: 198.—Garth, 1974: 401.—Patton, 1976: 18.—Austin & Sale 1980: 167.

Trapezia areolata inermis A. Milne-Edwards 1873: 259 , pl. × fig. 6.

Trapezia reticulata Stimpson, 1858: 37 .— Odinetz, 1984: 444, figs 3D, 3d, 4D.— Dai & Yang 1986: 355, pl. 51(5), fig. 185(3).

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 female (12.63 × 10.51 mm), NS-MJJ-2022-1050; 1 female (11.23 × 9.26 mm), NS- MJJ-2022-1061; 1 male (10.99 × 8.78 mm), NS-MJJ-2022-1062; 1 male (7.45 × 6.55 mm), NS-MJJ-2022-1063; 1 male (12.05 × 10.11 mm), NS-MJJ-2022-1066; 1 male (11.48 × 10.02 mm), NS-MJJ-2022-1069; 1 pre-adult (3.89 × 3.22 mm), NS-MJJ-2022-1075; 1 female (12.56 × 10.56 mm), NS-MJJ-2022-1081; 1 male (11.88 × 10.44 mm), NS-MJJ-2022-1082; 1 pre-adult (4.59 × 3.85 mm), NS-MJJ-2022-1115; 1 pre-adult (3.58 × 2.84 mm), NS-MJJ-2022-1116; 1 pre-adult (3.30 × 2.64 mm), NS-MJJ-2022-1117; 115°29.8’E 9°54.4’N, 13 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 6 May 2022, 1 male (8.35 × 7.22 mm), NS-MJJ-2022-1312; 1 female (10.21 × 8.68 mm), NS- MJJ-2022-1313; 1 male (5.62 × 4.63 mm), NS-MJJ-2022-1326; 1 female (2.54 × 2.12 mm), NS-MJJ-2022-1360; 1 female (7.32 × 6.39 mm), NS-MJJ-2022-1376; 1 female (6.06 × 5.23 mm), NS-MJJ-2022-1377; 1 female (4.35 × 3.83 mm), NS-MJJ-2022-1378; 115°33.8’E 9°52.9’N, 8 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 9 May 2022, 1 male (6.51 × 5.33 mm), 1 female (10.91 × 9.6 mm), NS-MJ-2022-1607; 1 male (4.22 × 3.46 mm), 1 female (5.88 × 5.08 mm), NS-MJ-2022-1620; 1 pre-adult (2.69 × 2.37 mm), NS-MJ-2022-1626; 1 pre-adult (2.59 × 2.32 mm), NS-MJ-2022-1631, in Seriatopora hystrix ( Pocilloporidae ); 1 female (5.53 × 4.72 mm), NS-MJ-2022-1638; 1 male (4.48 × 3.85 mm), NS-MJ-2022-1667; 1 pre-adult (6.95 × 6.26 mm), NS-MJ-2022-1708; 115°34.4’E 9°53.5’N, 10 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 10 May 2022, 1 pre-adult (5.27 × 4.55 mm), NS-MJ-2022-1745; 5 pre-adults (3.80 × 3.13 mm; 2.81 × 2.29 mm; 3.08 × 2.50 mm; 2.38 × 2.15 mm; 2.79 × 2.55 mm), NS-MJ-2022-1749; 6 pre-adults (3.83 × 2.97 mm; 3.12 × 2.86 mm; 2.54 × 2.16 mm; 2.64 × 2.02 mm; 2.40 × 1.84 mm; 2.33 × 1.76 mm), NS-MJ-2022-1800; 1 pre-adult (2.79 × 2.55 mm), NS-MJ-2022-1827, in almost dead Pocillopora ( Pocilloporidae ). Fiery Cross Reef, 112°58.6’E 9°38.7’N, 12 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 12 May 2022, 1 male (8.25 × 7.15 mm), NS-YS-2022-1013; 1 male (8.77 × 7.60 mm), NS-YS-2022-1038; 113°0.8’E 9°39.9’N, 10 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 14 May 2022, 1 pre-adult (3.11 × 2.64 mm), NS-YS-2022-1174; 1 pre-adult (3.06 × 2.57 mm), NS-YS-2022-1231; 1 male, 1 male (5.93 × 4.70 mm), NS-YS-2022-1285, in partially dead Acropora ( Acroporidae ).— Zhongsha Islands: Margesson Shoal, 114°38.7’E 15°55.3’N, 20 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 17 May 2022, 1 male (5.28 × 4.32 mm), ZS-NF-2022-1013. Walker Shoal, 114°29.0’E 15°55.0’N, 15 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 17 May 2022, 1 male (7.89 × 6.45 mm), 1 female (8.05 × 6.58 mm), ZS-MB-2022-1002; 1 female (7.76 × 6.39 mm), 1 pre-adult (4.69 × 4.01 mm), ZS-MB-2022-1021. Shenhu Shoal, 17 m, coll. Geng Qin, Wein Jiang, 14 May 2019, 1 pre-adult (4.29 × 3.92 mm), ZS102C01; 113°0.7’E 19°30.3’N, 17 m, 5 July 2020, 1 male (9.14 × 7.45 mm), 1 female (9.59 × 7.98 mm), ZSS244C06.— Xisha Islands: The Seven Connected Islets, 112°16.2’E 16°58.0’N, 10 m, coll. Shaobo Ma, Yuli Sun, Ziming Yuan, 19 May 2022, 1 male (6.84 × 5.87 mm), 1 female (7.48 × 6.30mm), XS-QL-2022-1070; 112°19.6’E 16°57.1’N, 10 m, 21 May 2022, 1 male (8.45 × 7.45 mm), 1 female (9.99 × 7.88 mm), XS-QL-2022-1072; 1 male (6.81 × 5.70 mm), 1 female (7.81 × 6.74 mm), XS-QL-2022-1168. North island, 16°58’N 112°19’E, 10 m, coll. Shaobo Ma, Nov. 2020, 1 male (6.60 × 5.65 mm), XSBD 02. Yuzhuo Reef, 112°06’E 16°22’N, 2–3 m, coll. Wei Jiang, 9 July 2017, 1 male (5.45 × 4.66 mm), YZ01; 1 male (9.15 × 8.25 mm), YZ02.— Hainan Island: Hou Hai, 2–3 m, coll. Shenghui Hu, 20 October 2021, 2 males (8.12 × 7.45 mm; 4.42 × 3.78 mm), 2 females (8.95 × 7.74 mm; 4.12 × 3.56 mm), SY71. Fenghuang Dao, 3 m, coll. Yitang Xu, 15 August 2021, 1 male (6.97 × 5.97 mm), SY31. Xiaodong Hai, 3 m, coll. Lecheng Qu, 1 male (11.22 × 9.70 mm), SY42. Found in Pocillopora ( Pocilloporidae ) unless otherwise noted.

Geographical distribution. Indian Ocean east of Sri Lanka and western and central Pacific Ocean to the Marshall Islands and Samoa ( Castro et al. 2004).

Remarks. Trapezia septata is a relatively common coral symbionts in the South China Sea.

Figures

FIGURE 9. A, Trapezia plana Ward, 1941, male (9.42 × 8.19 mm) (VX0302), Hainan Island; B, Trapezia plana, pre-adult (3.42 × 2.79 mm) (NS-MJ-2022-1750), Nansha Islands, Mischief Reef; C, Trapezia rufopunctata Herbst, 1799, male (19.18 × 18.18 mm) (NS-YS-2022-1098), Nansha Islands, Fiery Cross Reef; D, Trapezia septata Dana, 1852, female (12.63 × 10.51 mm) (NS-MJJ-2022-1050), Nansha Islands, Mischief Reef; E, Trapezia serènei Odinetz, 1983, male (5.36 × 4.78 mm) (XS-QL- 2022-1174), Xisha Islands, Seven Connected Islets.