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Stick Insect Antennae

Insects have an elaborate sense of touch. Their most important source for tactile information is the pair of feelers on the head: the antennae (Figure 1; singular: antenna). The stick insect Carausius morosus is one of four major study organisms for the insect tactile sense. 
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Figure 1 
The stick insect Carausius morosus (de Sinety 1901) carries a pair of long and straight feelers, or antennae. They are the main sensory organs for touch and smell