Engonia sp. 1

Fianco, Marcos, Szinwelski, Neucir & Faria, Luiz R. R., 2022, Katydids (Orthoptera: Tettigoniidae) from the Iguaçu National Park, Brazil, Zootaxa 5136 (1), pp. 1-72 : 27

Engonia sp. 1

Fig. 10I, J ; 15C

Comments: This species is probably new, differing from the three currently described species of Engonia , E. minor , E. pistacina Brunner von Wattenwyl, 1878 and E. rectangulata Burmeister, 1838 . The individuals analysed here differentiate from the species of the genus by: (1) pronotal carinae tricolour (red, white and black), (2) white strip behind the eyes, towards the pronotum, (3) antennae entirely black, (4) pronotal disc with red punctations, (5) males with cerci dilated at its base and straight, in the apex a spine appears, where a spine appears, (6) subgenital plate almost square with posterior processes longer than large, (7) median keel across its length, (8) apex of tegmina acuminated, and (9) vertex fastigium bilobate. However, the lack of designation of lectotypes both for E. minor and E. pistacina precludes the description of this new species by now.

Bioacoustics ( Fig. 12E–H ): Males produce echemes of moderate duration, where each sequence is composed by three to seven syllables. Each syllable is composed by five to eight isolated pulses, in a “tic” pattern, with syllables of opening and closing stroke. The hemisyllables of opening are of low intensity and frequency, and the closing are of high intensity and higher frequency. Additionally, during the syllables, the first pulses have smaller intensity than the last ones. The records of the calling song of E. minor and of Engonia sp. 1 are the first of species within Cosmophylla.

Dominant frequency: 12.3 ± 1.2 kHz.

Bandwidth: 5.2 ± 1.4 kHz.

Duration: Pulse: 0.01 ± 0.005 s; Syllable: 1.3 ± 0.1 s; Echeme: 32 ± 5 s.

Mute interval: Pulse: 0.1 ± 0.03 s; Syllable: 9.6 ± 4.7 s; Echeme: 500 ± 326 s.

Figures

FIGURE 10. Species of Aniarae, Cosmophylla and Dysoniini (Phaneropterinae) from the ParNa Iguaçu. A: Aniarella minor, female; B: Aniarella typica, male; C and D: Hyperophora brasiliensis, male and female; E: Hyperophora gracilis, male; F: Hyperophora major, male; G and H: Engonia minor, male and female; I and J: Engonia sp. 1, male and female; K: Dysonia pirani, male.

FIGURE 12. Calling songs of species of Cosmophylla species (Phaneropterinae) from the ParNa Iguaçu.A–D: Engonia minor; E-H: Engonia sp. 1.; A and E: sonogram of a supersequence of echemes; B and F: sonogram of one sequence of echemes; B and G: sonogram of one echeme; D and H: spectrogram of the respective echeme.

FIGURE 15. Live specimens ofAniarae, Cosmophylla, Microcentrini and Odonturini (Phaneropterinae) from the ParNa Iguaçu. A: Aniarella typica, male; B: Hyperophora brasiliensis, male; C: Engonia minor, male; D: Engonia sp. 1, male; E: Anapolisia micromargaritifera; F: Microcentrum marginatum; G: Phillophyllia latior; H: P. venosa; I: Anisophya melanochloris, male; J: Xenicola xukrixi, female; all photos by Marcos Fianco.