Parapatric Distribution of the Lizards Plestiodon (Formerly Eumeces) latiscutatus and P. japonicus (Reptilia: Scincidae) Around the Izu Peninsula, Central Japan, and Its Biogeographic Implications Okamoto, Taku and Motokawa, Junko and Toda, Mamoru and Hikida, Tsutomu, Zoological Science, 23, 419-425 (2006), DOI:http://dx.doi.org/10.2108/zsj.23.419