Dinarippiger discoidalis Skejo, Kasalo, Fontana, Ivković, Tvrtković, Rebrina, Adžić, Buzzetti, Ćato, Deranja, Gomboc, Scherini, Škorput, Veenvliet, Vuković, Lemonnier-Darcemont, Darcemont & Heller, 2023, comb. nov.
Creators: name: Skejo, Josip
name: Kasalo, Niko
name: Fontana, Paolo
name: Ivković, Slobodan
name: Tvrtković, Nikola
name: Rebrina, Fran
name: Adžić, Karmela
name: Buzzetti, Filippo Maria
name: Ćato, Sebastian
name: Deranja, Maks
name: Gomboc, Stanislav
name: Scherini, Roberto
name: Škorput, Jadranka
name: Veenvliet, Paul
name: Vuković, Marijana
name: Lemonnier-Darcemont, Michèle
name: Darcemont, Christian
name: Heller, Klaus-Gerhard
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Tettigoniidae
Dinarippiger
Dinarippiger discoidalis

description: Bioacoustics of Dinarippiger discoidalis comb. nov.
The song of Dinarippiger discoidalis comb. nov. was first described by Harz (1967) and later analyzed and visualized by several other scientists (Keuper et al. 1988 a, 1988b, Heller 1988, Keuper 1989, Jatho et al. 1992, Jatho 1995, Massa et al. 2012). Our data corroborate the findings of the previous studies, showing that the song consists of echemes containing 3–7 (only very rarely 1–2) syllables (Fig. 11A–D). In structure, it is thus similar to the songs of Ephippiger species (see Jatho et al. 1992, Massa et al. 2012) but differs clearly from the songs of the European Uromenus species (Heller et al. 2021). Each syllable has a distinct opening and closing hemisyllable made by a series of strongly dampened impulses. These short elements are produced by jumping of the scraper against the teeth of the stridulatory file (see Fig. 11D) as is typical for Ephippigerini. The frequency spectrum of the song has its peak in the ultrasound, around 20 to 40 kHz (Fig. 11E; Keuper et al. 1988b). A relatively high syllable number per echeme should enable D. discoidalis comb. nov. females to discriminate against the mono- or disyllabic song of E. ephippiger when the species co-occur in the same habitat in Slovenia (see above), Croatia (see above), Bosnia & Herzegovina (Mikšić 1969) or Montenegro (Ingrisch & Pavićević 2012). In the Ephippiger diurnus complex, syllable number per echeme is important for phonotactic female choice (Ritchie 1991).
However, after a closer inspection of the temporal parameters of amplitude modulation (besides syllable number per echeme), an unexpectedly large variation has been observed (Table 1), even when taking the effects of temperature into account. Our data are too limited for drawing conclusions but among-individual differences as large as the ones found within a single field recording (Gomboc & Šegula 2014; #61) are quite surprising, despite the fact that animals in the sun may sing much faster than the ones in the shade.
The stridulatory structures are situated on the tegmina of both males and females. In the males, the stridulatory file is located on the underside of the left tegmen, whereas in the females it is situated diagonally on the upper side of the right tegmen (Fig. 12A–D). Correspondingly, the scraper is formed by the inner edge of the right tegmen in the male and of the left tegmen in the female. The right tegmen of the male carries a large glossy mirror cell. Stridulatory teeth are rather symmetrical (Fig. 12E–F) as can be expected for a species with loud opening and closing hemisyllables. In the female, the stridulatory structures may be used exclusively in a defensive context, a function already mentioned by Krauss (1878) for this species. Judging from the very limited data on the number of teeth in the male stridulatory file, differences among populations may exist (see Table 1).
description: Published as part of Skejo, Josip, Kasalo, Niko, Fontana, Paolo, Ivković, Slobodan, Tvrtković, Nikola, Rebrina, Fran, Adžić, Karmela, Buzzetti, Filippo Maria, Ćato, Sebastian, Deranja, Maks, Gomboc, Stanislav, Scherini, Roberto, Škorput, Jadranka, Veenvliet, Paul, Vuković, Marijana, Lemonnier-Darcemont, Michèle, Darcemont, Christian & Heller, Klaus-Gerhard, 2023, Dinarippiger gen. nov. (Tettigoniidae: Bradyporinae: Ephippigerini), a new saddle bush-cricket genus for Ephippiger discoidalis Fieber, 1853 from the Dinaric karst, pp. 49-90 in Zootaxa 5271 (1) on pages 63-66, DOI: 10.11646/zootaxa.5271.1.2, http://zenodo.org/record/7864189