Abstract
The types, number and the spatial arrangement of the sensilla on the antennae of the cave beetle, Aphaenops crypticola, have been determined by scanning electron microscope. The antenna is composed of 11 segments. There are 3 types of sensilla chaetica and s. trichodea, s. basiconica, s. ampullacea, s. campaniformia, tuberculated-peg, and proprioreceptors; a special type of chemoreceptor is described and named s. basiconica inflata. The antenna has about 1800 sensilla; their number increases from the scape to the distal segment. On the flagellar segments the long s. chaetica type 1 are located on a sub-distal ring, except on the 11th segment where there are 2 rings; the short s. chaetica type 3 are distal; the chemoreceptors appear on the 3rd, 4th and 8th segments. The peg morphology of the sensillum ampullaceum is described.
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