Tainacanthus ferox
The sound production mechanism differs between the sexes, males have one stridulatory file located under the left tegmen made of about 80 teeth (Figs. 21−22), while females have a “stridulatory file” located dorsally on each tegmina (Figs. 23−24), consisting of a series of over 60 sclerotized pegs in each tegmina. Electron micrographs show the detailed structure of the stridulatory pegs in both sexes; those of the males are thickened and somewhat flattened teeth (Figs. 25−26), while those of the females appear as small spiny denticles with differences between the left and right sides (Figs. 27−28).
The song of male Tainacanthus can be described as three (sometimes two) short and not very loud notes that are repeated intermittently every few seconds. These songs are relatively weak though it is possible to hear them from over 30 meters away. This is different from the species of Polyancistrus, for example, P. serrulatus, which can produce very loud calls which are repeated every few seconds.
At night katydids persistently called from protected sites within the shrubs always perched at heights of less than two meters above the ground, becoming silent when approached. [1]