We describe for the first time the behavior “Intense Leg Tapping (ILT)” being used in a prey-predator context between the Neotropical harvestman Mischonyx cuspidatus (Roewer 1913) and the syntopic spider Ctenus ornatus (Keyserling 1877). Previously, the harvestman's repeated fast dorsoventral movements of legs II had only been described during conspecific male-male interactions. We suggest it has a defensive function.
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Vol. 42 • No. 1