Isophya clara Ingrisch & Pavićević, 2010, sp. n.
Creators: name: Ingrisch, Sigfrid
name: Pavićević, Dragan
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Orthoptera
Phaneropteridae
Isophya
Isophya clara

description: Isophya clara sp. n.
Figs. 3–5, Tabs. 2–4.
Holotype (male): Montenegro: Durmitor, Jarčište southeast of Boričje, 1500m, 7.VIII.1990, leg. D. Pavićević in Coll. Muséum d'Histoire naturelle de Genève (MHNG).
Paratypes: Montenegro: Durmitor, 2 Ƥ, same locality as holotype, 6.VIII.1988, leg. D. Pavićević (CDPV); 3 3, 4Ƥ, Donji Unač, 29.VII.1988, leg. Ingrisch & Pavićević (CI + CDPV); 10 3, 4 Ƥ (including allotype), Trsa, 1400m, fresh meadow, 6.VIII.1988, leg. Ingrisch & Pavićević (allotype in MHNG, remainder in CI + CDPV); 1 3, Boričje, 3.VIII.1990, leg. D. Pavićević (CDPV); 10 3, 3 Ƥ, Jarčište SE Boričje, 1500m, 7.VIII.1990; 6 3, 2 Ƥ, Dubrovsko – Bezuje, 1300–1400m, 10.–11.VIII.1989, leg. Ingrisch & Pavićević (CI + CDPV); 2 3, 2 Ƥ, Grabovica, Ivica, 1500m, 19.VIII.1995, leg. D. Pavićević (CDPV).
Other material studied: Montenegro: 2 3, 5 Ƥ, Bijelo Polje, Pešter Plateau, Đalovići, 1100m, 22.VI.1990, leg. D. Pavićević (CDPV). Serbia: 5 3, 5 Ƥ, Beograd-Miljakovac, fresh meadow, 31.V.1978, leg. D. Pavićević (CDPV); 1 3, 1 Ƥ, do., 22.VI.1982; 4 3, 4 Ƥ, do., 16.V.1983; 11 3, 3 Ƥ, do., 26.IV.1990 e.l.; 8 3, 4 Ƥ, do., 6.V.1990; 1 3, 1 Ƥ, do., 8.V.1992; 2 3, do., 12.V.1994; 1 3, 1 Ƥ, do., 29.V. 1994; 2 3, do., 2.VII.1994; 1 3, do., 7.VII.1995; 2 3, 1 Ƥ, do., 31.V.1996; 2 3, 1 Ƥ, do., 14.V.2007; 1 3, do., 20.VI.2008; 4 3, 4 Ƥ, Beograd – Stepin Lug, fresh meadow with pond behind, 25.V.2007, leg. D. Pavićević (CDPV); 1 3, 1 Ƥ, Belanovica, 2 Ƥ, Kosjerić, Tubići, 550m, 10.VII.1983, leg. A. Ćetković (CDPV); 1 Ƥ, Zlatibor Mt., Partizanske Vode, 1000m, 10.VIII. 1974, leg. B. Malinić (CDPV); 7 3, 9 Ƥ, Zlatibor Mt., Vodice, ca. 1000m, 27.VII.1987, leg. Ingrisch & Pavićević (CI + CDPV); 7 3, 6 Ƥ, do., 26.VII.1988; 4 3, 3 Ƥ, Nova Varoš, Zlatar Mt., 1000m, 1.VIII.1990, leg. Ingrisch & Pavićević (CI + CDPV); 5 3, 3 Ƥ, Novi Pazar, Manastir Sopoćani, 21.VI.1990, leg. Ingrisch & Pavićević (CI + CDPV); 4 3, 1 Ƥ, Rudnik Mt., Zagrađe, 500m, 9.VI.1996, leg. D. Pavićević (CDPV);1 3, 1 Ƥ, Pešter Plateau, Tepe, Đerekare, 1100m, 20.VI.2006, leg. D. Pavićević (CDPV); 1 3, Pešter Plateau, Sjenica, Vapa, 1100m, 24.VII.2006, leg. D. Pavićević (CDPV); 1 3, 1 Ƥ, Pešter Plateau, Karajukića Bunari, Duga Livada, 1150m, 30.VI.2008, leg. D. Pavićević (CDPV); 2 3, 2 Ƥ, Pešter Plateau, Crvsko, 1100m, 2.VII.2008, leg. D. Pavićević (CDPV); 1 3, do., 30.VII.2008; 1 Ƥ, Pešter Plateau, Boljare, 30.VII.2008, leg. D. Pavićević (CDPV).
Type locality. Montenegro, western Durmitor range, Jarčište SE Boričje, fresh to moist mountain meadows.
Measurements. See Tabs. 2–3.
Diagnosis. The new species is similar to I. modesta Frivaldsky, 1867, which occurs in Romania. It differs in the male by shorter tegmina compared to pronotum length and by a lower number of teeth on the stridulatory file (Tabs. 2–3). In the female it differs by a shorter and more strongly curved ovipositor. The difference in ovipositor length is distinct in females from Serbia (Beograd-Miljakovac), while in females from Durmitor, the ovipositor is of almost the same length as in I. modesta (Tab. 2) but more strongly curved. Male stridulation is mono-syllabic with a single, uninterrupted pulse series, while in I. modesta the syllables consist of two pulse series separated by a short pause (Orci & Heller 2004). I. modestior Brunner, 1882, another widespread species on the Balkan peninsula, differs by stridulation, stridulatory file, shape and length of male tegmina and other morphometrical data (Tabs. 2–3).
Description. A medium-sized to large species. Scapus 1.3–2.2 x broader than fastigium verticis. Fastigium verticis shallowly to deeply furrowed above.
Male. Pronotum (Figs. 3 A–B) widening posteriorly, lateral margins substraight to weakly concave, dorsal margin from almost straight to faintly raised before posterior margin. Tegmina 1.0–1.1 (mean = 1.07) times longer than pronotum; stridulatory vein (cu2) hardly thicker than the other veins. Stridulatory file (Figs. 4 A– B) with 58–72 teeth of increasing size from base to internal margin of wing. Epiproct (Fig. 3 D) transverse, apico-lateral angles rounded. Cerci (Figs. 3 D–E) gradually narrowing towards apex, curved in circa apical third; apex transverse-truncate and with a minute tooth. Subgenital plate (Fig. 3 D) narrowing before apex; apex with two triangular lobes.
Female. Pronotum (Fig. 3 C) slightly widening posteriorly, lateral and dorsal margins substraight. Pronotum 1.7–2.4 (mean 2.0) x longer than tegmina; apex of tegmina faintly convex. Epiproct rounded to transversely rounded. Cerci conical, apex subacute to subobtuse. Subgenital plate (Fig. 3 F) small, transversetriangular. Ovipositor (Fig. 3 G) sabre-shaped, weakly curved, apex dentate.
species I. modesta Frivaldsky, 1867 and I. modestior Brunner v.W., 1882 [minimum-maximum (mean)]. Localities as in
Tab. 2.
Species Index Pronotum Tegmen n Number of n
Scapus: Fastigium length: width length: width stridulatory teeth Locality Syllable duration (ms) Number of pulses Temperature (˚C) n Coloration. Green with blackish brown dots. Two white lateral bands on vertex, discus of pronotum, and ventral margins of pronotum. Pronotum with two red stripes medial of the white band. Tegmina of male with a large medium brown spot on discus between Media and Cubitus2.
Variation. Specimens from Miljakovac (Belgrade) differ from the above description as follows: Slightly smaller (Tab. 3). Index "length of tegmen: length of pronotum" more variable but with about the same mean (male 0.9–1.3, mean 1.02). Spot on male tegmen blackish brown. Epiproct in male from subquadrate to transverse, apico-lateral angles rounded and slightly concave in between. Subgenital plate in male with triangular apical lobes smaller. Cerci of female subobtuse to obtuse. Subgenital plate of female transversely rounded; in females from Zlatibor it is either rounded or triangular. Ovipositor shorter (Tab. 2).
Etymology. Named for the song that is more clear to the human ear than that of other Isophya species; from Latin clarus = clearly audible.
Distribution. Presently known from Montenegro and Serbia.
Stridulation (Fig. 5). The calling song consists of single, decrescenting syllables of 128–315 ms (Figs. 5 A–B, Tab. 4), which are usually arranged in loose groups with a variable number of syllables. The number of pulses in a syllable is only 20–31, corresponding to the low number of 58–72 teeth on the stridulatory file (Tab. 4, Figs. 4 A–B). Those teeth are narrow at the base and gradually become spaced towards the internal margin of the wing. As the number of teeth is more than twice as much as the number of pulses in a syllable and each stroke of the scrapper at a teeth produces a pulse, that would mean that less than half of the teeth are used in sound production. The frequency range shows a distinct maximum at about 14–17 kHz. Thus the song is more clearly audible to the human ear than that of other Isophya species. The variation of the syllable duration depends mainly on temperature (Fig. 5 C). The number of pulses do not differ markedly between different populations from Montenegro and Serbia (Tab. 4).
description: Published as part of Ingrisch, Sigfrid & Pavićević, Dragan, 2010, Seven new Tettigoniidae (Orthoptera) and a new Blattellidae (Blattodea) from the Durmitor area of Montenegro with notes on previously known taxa, pp. 1-41 in Zootaxa 2565 on pages 5-10, DOI: 10.5281/zenodo.197230