Steirodon (Posidippus) dentiferoides Emsley, 1970

Fianco, Marcos, Szinwelski, Neucir & Faria, Luiz R. R., 2022, Katydids (Orthoptera: Tettigoniidae) from the Iguaçu National Park, Brazil, Zootaxa 5136 (1), pp. 1-72 : 53

Steirodon (Posidippus) dentiferoides Emsley, 1970

Fig. 25B, C

Distribution: Brazil: Pará, Paraná, Santa Catarina; Guyana.

New record for the Paraná State.

Comments: The first record of this species after its original description was made by Nasckrecki (2007), in Guyana. Here we provide a new record for the species that is not that far from the type locality. The known distribution of S. dentiferoides resembles that of the previous species, as an enormous gap of records between Amazon and Atlantic Forest also exist .

Bioacoustic ( Fig. 26D–F ): Males stridulate only at night, continually emitting syllables that apparently do not form echemes. In the same way as for the anterior species, the syllables are composed by pulses that are sparser in the first half of the syllable then becoming more grouped towards the end of the syllable.

Dominant frequency: 13 ± 1.9 kHz.

Bandwidth: 10 ± 0.5 kHz.

Duration: syllable: 0.03 ± 0.002 ms.

Mute interval: Syllable: 16.5 ± 8.6 s.

Figures

FIGURE 25. Species of Steirodontini (Phaneropterinae) from the ParNa Iguaçu. A: Cnemidophyllum citrifolium, male; B and C: Steirodon dentiferoides, male and female, respectively; D and E: S. dentiferum, male and female, respectively; F and G: Stilpnochlora marginoides, male and female, respectively; H and I: S. nanna, male and female, respectively.

FIGURE 26. Calling songs of species of Steirodontini and of Enthephippion olivaceum. A–C: Cnemidophyllum citrifolium; D–F: Steirodon dentiferoides; G–I: S. dentiferum. A: sonogram of one echeme; B, E and H: sonogram of one syllable; D and G: sonogram of two isolated syllables; C, F and H: spectrogram of the respective syllable.