Fig. 1 in Geographic Distribution and Genetic Structures of the Tideland Snails and in Taiwan and Japan.

Fig. 1. Sampling sites of Pirenella nipponica and P. asiatica. Sampling at Japanese sites was carried out in the previous study (Kojima et al. 2006). Areas shown in the pie graphs reflect the number of collected individuals. Black and white sectors in the pie graphs indicate relative frequencies of P. nipponica and P. asiatica.