Maximum-likelihood tree constructed based on Hasegawa-Kishino-Yano model + G model for cox1 sequences (549Â nt) of B. straminea samples collected from different sites in Hong Kong. The abbreviated names and numbers denote the samples collected from the sites listed in Table 1. Red colour represents B. straminea with red-coloured shells. DP1, DP2, DG11 and DG12 (marked in blue) represent B. straminea collected in cities outside Hong Kong (Shenzhen (DP) and DongGuan (DG) in the mainland China. (PDF 184 kb
