Fig. 3. (A) Graph showing the tooth pitch on the right files of five Teleogryllus oceanicus fore-wings, showing that the tooth spacing increases along the active length of the file: during sound production, the plectrum moves from the posterior to anterior on the file, as shown by the arrow. (B) Graph showing the cumulative number of teeth versus distance along the file for six right files of T. oceanicus fore-wings. Note that approximately half the teeth are situated on the distal third of the file.

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