Sense organs on the antennal flagellum of a walkingstick Carausius morosus Brünner (Phasmida)

The long, filamentous antennal flagellum of Carausius morosus has on it three types of sense organs (1) tactile hairs, (2) thick‐walled chemoreceptors and (3) thin‐walled chemoreceptors. Tactile hairs and thick‐walled chemoreceptors are present on all of the 40 or more flagellar subsegments while thin‐walled chemoreceptors are limited to about one‐third of them. Thin‐walled chemoreceptors are present on subsegments nine and ten, one of the subsegments between 15 and 20 and from approximately the thirtieth subsegment to the distal end of the antenna. A description of each of these sense organs is given. No coeloconic or campaniform sense organs were found.