Structural and functional classification of antennal sensilla of the cockroach, Leucophaea maderae

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Abstract
Summary Antennal sensilla of Leucophaea maderae were investigated electrophysiologically, labeled and then examined with the scanning or transmission electron microscope. The sensilla can be classified into morphological types according to their external shape and the structure of their hair wall. Sensilla showing similar reaction spectra of their cells can be cathegorized into physiological groups. The morphological classification corresponds to the physiological grouping: one morphological type of sensillum comprises one or several groups of physiologically similar sensilla. In many of these groups constant combinations of physiologically different cells occur. The possible functional significance of the relationships found between the structural features of the sensilla and the physiological properties of their sensory cells is discussed.