ミヤマダイコクコガネ(Copris pecuarius嗅感覚子の外部微細構造と匂応答

抄録

The Japanese dung beetle, Copris pecuarius, has a large number of olfactory sensilla in the periphery of the 7th and 8th segments of the antennae. The length of each sensillum ranges from 12 to 23μm and the diameter from 2.5 to 3μm at the base. The number of sensilla on the 7th segment varies from 1, 600 to 1, 900. Small olfactory pores are distributed on the surface of the sensilla. Olfactory cells in a sensillum reacted well to odor of cow dung and 2-butanone. Unitary impulses were 1 to 10mV in height and 2 to 2.5msec in duration.