Hyperophora gracilis Rehn, 1907

Fig. 10E

Distribution: Brazil: Paraná; Paraguay: Paraguari.

New record for Brazil and for the Paraná State.

Comments: This is the first record of the species after its original description. The type-locality is located less than 300 km away from the ParNa Iguaçu, where only one individual was collected. Considering the number of individuals of H. brasiliensis collected at ParNa Iguaçu, H. gracilis can be considered rare. As in H. brasiliensis, the male was stridulating on shrubs of the forest understory, at heights greater than two meters.

Bioacoustics (Fig. 11F–H): This song is described based on the stridulation of a single male, that produced echeme sequences with long duration (ca. 15 minutes). Each echeme is composed by four to seven syllables. The echemes have a duration of more than three hours, so we were not able to rightly determine the duration.

Dominant frequency: 14.8 ± 0.8 kHz.

Bandwidth: 5.1 ± 1.5 kHz.

Duration: Syllable: 0.03 ± 0.01 s.

Mute interval: Syllable: 3.4 ± 1.9 s.