Comparison of G1 of Somanniathelphusa zanklon Ng & Dudgeon, 1992, from different localities. Male (30.6 × 24.5 mm), SYSBM 101007, Coloane, Macau (A); male (38.8 × 31.9 mm), SYSBM 101002, Jinding, Zhuhai City, Guangdong (B); male (42.0 × 33.5 mm), SYSBM 101004, Sun Yat-sen University, Guangzhou City, Guangdong (C); male (35.7 × 28.4 mm), SYSBM 101015, Sihui City, Guangdong (D); male (28.3 × 21.3 mm), SYSBM 101020, Renhua, Shaoguan City, Guangdong (E); male (31.5 × 26.6 mm), SYSBM 101021, Lianhua Mountain, Shanwei City, Guangdong (F); male (35.0 × 28.3 mm), SYSBM 101032, Raoping, Chaozhou City, Guangdong (G); male (26.3 × 20.4 mm), SYSBM 101037, Wenzhou City, Zhejiang (H). Scale bars: 1.0 mm.