Body and prothorax relatively longer than in A. t. hirayamai Fujita, 2018 from Central Honshu (Japan); elytra usually pale in anterior third (about a half of the type series), with smaller and sparser punctation; only 2 males are light along most of elytral surface (darkened laterally and apically); only 1 male with totally black elytra; 1st antennal joint, legs and abdominal apex are always pale.

Body length in males: 5.7-8.0 mm, width: 1,5-1,9 mm; body length in females: 6,7-6,8 mm, width: 1,7-1,9 mm

Russian, Yuzhno-Sakhalinsk environs, southern Sakhalin

Named after old Japanese name of Yuzhno-Sakhalinsk - Toyohara.