Russia, South Korea and
Japan. Kuramochi and Naganuma (2010) described that the red and
green-black types should be identified as A. japonicus and A. armata
(Selenka, 1867), respectively, whereas Sun et al. (2010) suggested
that the three color variants belong to a single species A. japonicus
based on mitochondrial genomic analyses. In the present study, the
black type was used for the experiment and was described under
the name of A. japonicus, because the taxonomic confusion has not
been resolved yet.