Abstract
The ears of Oenosandra boisduvalii (Oenosandridae), as a representative of this heretofore unstudied family of moths, were electrophysiologically examined from specimens captured in South Australia. Male and female moths possess ears with two auditory receptor neurons that are similarly sensitive and tuned to the frequencies emitted by sympatric bats, suggesting that both sexes face equal predation pressures from aerially foraging bats. The two-celled ear of this moth supports the independence of the Oenosandridae from its previous affiliation with the Notodontidae, whose single auditory neuron remains a unique character within the Noctuoidea. The general insensitivity of its ear, however, resembles that of the notodontid moth and is surprising considering the diversity of insectivorous bats that forms its predation potential.
Published Version
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