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Several arachnid species use chemicals to detect sexual partners. In harvestmen, there are evidences that chemicals may play a role in intraspecific communication. Using the behavior of Discocyrtus prospicuus (Holmberg 1876), whose males expose the penis to females before they engage in mating posture, we tested if males detect females by contact chemoreception (chemicals left on the substrate) and...
In general pompilid wasps parasitize female spiders due to their larger size and/or higher fat reserves compared to males. We describe parasitoid behavior of the pompilid wasp Anoplius bicinctus on Allocosa brasiliensis and investigate the frequencies of parasitoidism according to spider developmental stage. We performed field observations and recorded frequency and duration of parasitoidism behaviors,...
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