Uca arcuata (De Haan, 1835)

(Fig. 2 E–F)

Ocypode ( Gelasimus)) arcuata De Haan, 1835: 53, pl. 7, fig. 2 [type locality Japan].

Gelasimus brevipes H. Milne Edwards, 1852: 146, pl. 3(7) [type locality China]; Stimpson 1907: 106 [list].

Uca brevipes — Gee 1926: 165 [China].

Uca arcuata — Kellogg 1928: 256 [Fuzhou]; Rathbun 1931: 101 [Xiamen; Fuzhou; Santu]; Gordon 1931: 528; Shen 1932: 273, pl. 9(4), text-figs. 167, 168 [Shandong]; Shen 1937a: 309 [North China]; 1937b: 170, 184 [North China]; Shen & Dai 1964: 109, unnumbered text-fig. [Jiaozhou, Shandong; Zhejiang; Fujian; Guangdong]; Jones & Morton 1994: 13, pls. 1C, D, 2C, D, fig. 2 [Hong Kong]; Chen 1991: 410, pl. 4(7), fig. 381 [Zhejiang]; Yang & Liu 1996: 189 [Zhanjiang, Guangdong]; Cai et al. 1998: 117 [Hong Kong]; Ying et al. 1999: 34 [Zhejiang]; Zhang & Sun 2001: 58 [Jiaozhou, Shandong]; Chen et al. 2002: 58 [Wenling, Zhejiang]; Xu 2002: 60 [Rizhao, Shandong]; Tang et al. 2007: 259 [Zhanjiang, Guangdong]; Wang & Yan 1999: 91 [Lianyun Harbor, Jiangsu]; Huang et al. 2003: 258 [Quanzhou, Fujian]; Xiao & Li 2003: 61 [Naozhou, Zhanjiang, Guangdong]; Li 2004: 21 [Fujian]; Kwok & Tang 2006: 4, figs. 4, 5 [Hong Kong]; Zhou et al. 2006: 168 [Shanghai]; Liu & He 2007: 152, unnumbered plate [Shanghai]; An et al. 2008: 582 [Shanghai]; Yang et al. 2008: 807 [East China Sea; northern South China Sea].

Uca forcipata (not Gelasimus forcipatus Adams & White, 1848)— Rathbun 1931: 101 [Wenzhou; Sandu; Guantou; Meihua; Fuzhou; Liuwudian; specimens examined by Crane (1975: 594)].

Gelasimus arcuatus — Shen 1940: 231 [Hong Kong].

Uca (Deltuca) arcuata — Crane 1975: 44, pls. 5A–F, figs. 8C, 9C, 61J; Dai et al. 1986: 420, pl. 58(5), fig. 232 [Shandong; Zhejiang; Fujian; Guangdong]; Dai & Yang 1991: 460, pl. 58(5), fig. 232 [Shandong; Zhejiang; Fujian; Guangdong]; Lu 1996: 165 [Xiamen, Fujian]; Lai & He 1998: 172 [Guangxi]; Liang et al. 2005: 22 [Leizhou, Guangdong].

Uca acuta (not Gelasimus acutus Stimpson, 1858)— Kwok & Tang 2006: 4, fig. 2 [Hong Kong].

Uca (Tubuca) arcuata —Ng et al. 2008: 241 [list].

Material examined. Shandong: 3 3 (17.39–21.48 mm) (MBMCAS 166348), Chengyang, Jimo, north of Qingdao, coll. R.-Y. Liu, 26 Jul. 1957; 12 3 (19.26–31.16 mm, one damaged), 1 3 (30.78 mm) (MBMCAS 166378), Fengcheng, Jimo, north of Qingdao, 25 Sep. 1980; 1 3 (32.56 mm) (MBMCAS 166347), Tuandao Bay, Qingdao, 25 Nov. 1951; 5 3 (23.12–26.98 mm) (MBMCAS 166335), Nügukou, Chengyang, Qingdao, coll. Y.-L. Wang, 8 Aug. 1957; 1 3 (23.47 mm) (MBMCAS 166346), Nügukou, Chengyang, Qingdao, 28 Aug. 1950; 1 Ƥ (17.53 mm) (MBMCAS 166308), Nügukou, Chengyang, Qingdao, coll. Yang & Liu, 23 Jul. 1957; 2 3 (23.98, 24.16 mm) (MBMCAS 166344), Xuejiadao, Huangdao, Qingdao, coll. X.-J. Zhang, 20 Jul. 1960; 2 3 (23.15, 37.17 mm) (MBMCAS 166382), Xiaojiagui, Jiaonan, Qingdao, coll. S.-W. Wang, 18–21 Jun. 1974. Jiangsu: 1 3 (22.06 mm) (MBMCAS 166309), Sheyang, Yancheng, 14 Jun. 1956; 2 3 (31.8, 33.15 mm), 2 ƤƤ (29.82, 32.2 mm) (MBMCAS 166392), Beikan, Rudong, Nantong, 5 Jun. 1956; 1 3 (28.06 mm) (MBMCAS 166343), Lianyun Harbor, 28 May 1962. Shanghai: 2 3 (no CW data) (ZRC 1998.308), Qidong, coll. Y. Li, 1 May 1996. Zhejiang: 1 3 (20.08 mm), 5 ƤƤ (17.3–23.49 mm) (MBMCAS 166359), stn. 4, Putao, Leqing, Wenzhou, 20 Sep. 1979; 2 3 (21.33, 24.6 mm) (MBMCAS 166356), stn. 10, Putao, Leqing, Wenzhou, 20 Sep. 1979; 1 3 (19.51 mm) (MBMCAS 166342), stn. 3, Ximendao, Leqing, Wenzhou, 21 Sep. 1979. Fujian: 3 3 (25.4–28.55 mm), 1 Ƥ (25.41 mm) (ZRC 2002.0564), Longhai, Xiamen, coll. P. K. L. Ng & S.-H. Fang, 22 Sep. 2002; 11 3 (19.44–29.25 mm), 3 ƤƤ (18.79–26.04 mm) (NCHUZOOL 13350), Jimei, Xiamen, coll. H.-T. Shih & J.-H. Lee, 1 Jul. 2004. Hong Kong: 2 3 (30.83, 34.47 mm) (NCHUZOOL 13360), Tai O, coll. K.H. Lo, Jun. 2009; 1 Ƥ (24.25 mm) (NCHUZOOL 13361), Tai O, coll. K. Wong & K.H. Lo, 28 Apr. 2009; 2 3 (15.6, 19.72 mm), 2 ƤƤ (1 ovig.) (17.36, 17.4 mm) (NCHUZOOL 13362), Tung Chung, coll. K. Wong & K.H. Lo, 28 Apr. 2009. Hainan: 4 3 (11.53–16.71 mm) (MBMCAS 161679), Beigang, Meilan, Haikou, 7 Jun. 1958; 1 3 (31.25 mm) (MBMCAS 161685), Qükou, Dongzhai, 14 Mar. 1992; 4 3 (27.16–35.28 mm), 8 ƤƤ (1 ovig.) (17.5–36.48 mm) (NCHUZOOL 13363), Dongzhai, coll. H.-T. Shih & J.-H. Lee, 23 Jun. 2004. Guangxi: 1 Ƥ (13.48 mm) (NCHUZOOL 13364), Qinzhou, coll. H.-T. Shih & Y.-H. Wang, 10 May 2009.

Distribution. Japan, Korea, China, Taiwan, and Vietnam (cf. Table 1).

Remarks. Uca arcuata is widely distributed in continental East Asia (Korea, China, and Vietnam), East Asian islands (Japan, including the Ryukyus, Taiwan, and Penghu), and Hainan (cf. Table 1; Kamita 1941; Dai et al. 1986; Dai & Yang 1991; Shih 1994; Kosuge et al. 1997; Yoshigou 2001; Shih et al. 2008). It is probably one of the most common species in East Asia, especially on mudflats associated with mangroves (cf. Shih et al. 1999). In China, this species has been recorded from southern Shandong to Guangxi and northern Hainan (Table 1).