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Stridulation in Platypus apicalis, P. caviceps, and P. gracilis (Col., Platypodidae)

An elytral‐abdominal tergite stridulatory mechanism was found in the three species of Platypus in New Zealand, and is described for P. apicalis. Two types of stridulation: stress chirps and premating‐recognition stridulation, were identified. Premating‐recognition stridulation significantly increased the number of female beetles allowed to enter tunnels occupied by conspecific males. It is suggested that acoustic and tactile signals are important for close range communication among Platypodidae.