Important localities that appear in this paper, and the latest distribution of the pale grass blue Zizeeria maha. The Fukushima Dai-ichi NPP is indicated with black stars. (A) Map of Japan. The pink regions indicate the possible latest distribution of the pale grass blue. The northern range margins were estimated based on our own field work and Shirôzu (2006) , (B) Map of the Kanto-Tohoku district in Japan. The radii of the circles measure 20, 40, 100, and 300 km from the Fukushima Dai-ichi NPP. The Roman numerals i-x indicate the localities as follows: (i) Fukaura, (ii) Hachinohe, (iii) Kinkazan, (iv) Sendai, (v) Shiroishi, (vi) Fukushima, (vii) Takahagi, (viii) Mito, (ix) Tsukuba, and (x) Tokyo. (C) Map of Fukushima Prefecture (coloured in green). The Arabic numerals 1-11 indicate the localities from which the specimens were collected in May and September 2011 after the accident and from which specimens were collected before the accident as follows: (1) Fukushima, (2) Iitate, (3) Hirono, (4) Iwaki, (5) Ono, (6) Koriyama, (7) Motomiya, (8) Shimogo, (9) Aizu-Sakashita, (10) Takasato (Kitakata), and (11) Mishima.
Hiyama et al. BMC Evolutionary Biology 2013 13:168 doi:10.1186/1471-2148-13-168