Carabus yaconinus BATES is widely distributed in the western part of Honshu and Shikoku, but only two subspecies, namely blairi BREUNING and the nominotypical yaconinus have been discriminated. In this study, the following eight geographical races are recognized and six of which are described as new subspecies : blairi BREUNING, sotai nov., cupidicornis nov., yaconinus BATES, oki nov., maetai nov., yamaokai nov. and seto nov.
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