Isophya dobrogensis Kis, 1994

Dragan P. Chobanov, Beata Grzywacz, Ionuţ Ş. Iorgu, Battal Cιplak, Maya B. Ilieva & Elżbieta Warchałowska-Śliwa, 2013, Review of the Balkan Isophya (Orthoptera: Phaneropteridae) with particular emphasis on the Isophya modesta group and remarks on the systematics of the genus based on morphological and acoustic data, Zootaxa 3658 (1), pp. 1-81 : 40-41

Isophya dobrogensis Kis, 1994

( Figs 20, 21 , 49, 73 , 98 , 123 , 174 , 184 , 194 )

Isophya dobrogensis Kis : Kis 1994 (sp.n.).

Morphological description: Kis 1994. Biacoustics: Iorgu 2012.

The species is well characterised in the cited references.

Supplement to the description and diagnosis: Fastigium verticis is about 1/2 of the width of scapus. Male tegmina are slightly shorter than pronotum, with right anal tegminal angle. Their Costo-Medial parts are short ( Fig. 49). Male stridulatory file ( Fig. 174 A) is 4–4.6 mm long and bears 261–275 teeth. Male cercus ( Fig. 98 ) is strongly incurved in the apical 1/3, with a distinct terminal tooth. Female tegmen is about 1/3 of the pronotum length ( Fig. 73 ). Female stridulatory apparatus is shown in Fig. 174 C. Ovipositor is long— 11–13 mm ( Fig. 97 ). Colouration in both sexes is variegated—green, with yellow, orange, reddish or violet lateral body stripes, antennae and tibiae. The disc of tegmen, CuA and CuP veins are brownish, reddish or green. Lateral parts of tegmina are banded with white. The species’ calling song ( Fig. 184 ) consists of groups of long elaborate syllables, similar in structure to these of I. costata .

Bioacoustics: The song was recorded at 26°С. The grouped syllables were separated by intervals of 2–5 s. First (main) part of the syllable consists of a compact impulse series of 300–420 ms with 60–100 impulses and more or less constant impulse interval of average 4–6 ms. The second part of the syllable follows at an interval of 90–230 ms and has quite a peculiar structure, consisting of 3–6 small groups of impulses, separated by intervals of 50–90 ms; each group includes 2–6 impulses with impulse period of 7–9 ms. The total duration of the syllables was 730– 1100 ms. Very interesting in this species is the male-female duet before mating, with one of the longest and more elaborate known female answers to male song in this genus. Female song occurs after the second part of male syllable and consists of variable series of 9–27 impulses, recorded for a period of 4–8 s. It begins with a group of 8– 13 impulses, lasting 301–596 ms and is followed by several widely spaced impulses.

Distribution ( Fig. 194 ) and phenology: Isophya dobrogensis is a local endemite known only from Popina Island in Razelm Lake (SE Romania), at 1–30 m alt. Nymphs—IV–V, imago—V–VI.

5. Isophya kraussii species group

This group shows similar characters to the I. costata group but we regard it separately on account of some differences in the song structure, smaller body size, short ovipositor, and different morphology of the sex chromosome. However, it is possible in future, when new acoustic, molecular, and karyological data is accumulated, to reconsider this group as well as the I. costata and I. pyrenaea groups.

Species of moderate size. Hind femur is shorter than 18 mm. Fastigium verticis is narrower than scapus (less than 1/2 of its width). The pronotal disc is long; the side keels of metazone are sinuately diverging. Male tegmina are distinctly shortened, usually shorter than pronotum. CuP is very long (about 4/5 times of the hind margin of metazone or longer), moderately widened, slightly bulged over the pronotal surface; CuP and CuA veins are very closely approximated as a result of bending the area between them and uplifting of CuA over the tegminal surface. In comparison to I. costata group CuA is situated higher than CuP. The stridulatory file has a very high number (180–305) of fine dense teeth. Female tegmina have truncate or concave apical margins and reticulate venation. The lower keels of the hind femur lack spines. Male cerci are moderately stout to moderately slender; their apical part is gradually incurved, rounded or more or less pointed. The cercal tooth is apically positioned, small, slender, pointed. The female ovipositor is short (usually 7–12 mm to 14 mm in I. zubowskii ). The body colouration is green; melanism is always absent. The disc of tegmina is green or brownish with dark stridulatory area. The lateral margins of pronotum in metazone have reddish stripe situated above the light band. The song consists of groups or long sequences of syllables lasting 120–400 ms. The X-chromosome is submetacentric (type 3 according to Warchałowska-Śliwa et al. 2008), similar to that observed within the I. pyrenaea group. We regard the group with four species (seven taxa)— I. brevicauda , I. kraussii kraussii Brunner von Wattenwyl, 1878, I. kraussii moldavica Iorgu & Heller, 2013 , I. pienensis pienensis Mařan, 1954 , I. pienensis austromoravica Chládek, 2010 , I. pienensis sudetica Chládek, 2011 , and I. zubowskii , though further reconsideration of the group’s constitution is possible. The range of the group covers the northeasternmost part of the Balkan Peninsula, Central Europe and the Carpathian basin (incl. Croatia, Slovenia, Austria, Hungary, Slovakia, S Germany, S Poland, Romania, W Ukraine).

Figures

FIGURE 194. Distribution of I. modestior, I. dobrogensis, I. zubowskii, I. aff. camptoxypha, I. gulae, and I. obtusa on the Balkan Peninsula.

FIGURES 19 – 30. General appearance of some Balkan Isophya; 19 — I. modestior (male); 20, 21 — I. dobrogensis (20 — male, 21 — female); 22, 23 — I. zubowskii (22 — male, 23 — female); 24, 25 — I. camptoxypha (24 — male, 25 — female); 26, 27 — I. gulae (26 — male, 27 — female); 28, 29 — I. obtusa (dark— 28, and green— 29 colour forms; males); 30 — I. speciosa (malebelow, and female—above).

FIGURES 56 – 79. Morphology of female head, pronotum and tegmina of the Balkan Isophya and I. yaraligozi (localities as in Figs 31 – 55 unless specifically given): 56 — I. hospodar; 57 — I. rectipennis; 58 — I. pavelii (paratype of I. rammei Peshev); 59 — I. thracica; 60 — I. bureschi; 61 — I. yaraligozi; 62 — I. tosevski; 63 — I. andreevae (paratype); 64 — I. clara; 65 — I. miksici (paratype); 66 — I. plevnensis (paratype); 67 — I. longicaudata adamovici (paratype, BG: Sliven, 1000 m, NMNHS); 68 — I. l. longicaudata; 69 — I. rhodopensis leonorae (BG: “ Alibotush, 1500 m ”, 13.07. 1959, NMNHS); 70 — I. rh. rhodopensis (as in Fig. 46 but 17.07.1956); 71 — I. rh. petkovi; 72 — I. modestior; 73 — I. dobrogensis; 74 — I. zubowskii; 75 — I. aff. camptoxypha (MK: Bistra Mt., 2.08. 2004, CC); 76 — I. gulae (paratype, BG: Dolna Topchiya, 10.07. 1974, NMNHS); 77 — I. obtusa (BG: Vezhen Peak, 15.07. 1969, NMNHS); 78 — I. amplipennis (TR: “ Turkey | 1960 | Sureya Bey ”, NHM); 79 — I. speciosa (BG: Sakar Mt., 14.06. 1952, NMNHS). Scale (if present; black line right of the specimen) = 10 mm.

FIGURES 80 – 104. Male abdominal terminalia of the Balkan Isophya and I. yaraligozi (localities as in Figs 31 – 55): 80 — I. hospodar; 81 — I. rectipennis; 82 — I. pavelii; 83 — I. thracica; 84 — I. bureschi; 85 — I. yaraligozi; 86 — I. tosevski; 87 — I. andreevae; 88 — I. clara; 89 — I. miksici; 90 — I. plevnensis; 91 — I. longicaudata adamovici; 92 — I. l. longicaudata; 93 — I. m. modesta (= intermedia); 94 — I. rhodopensis leonorae; 95 — I. rh. rhodopensis; 96 — I. rh. petkovi; 97 — I. modestior; 98 — I. dobrogensis; 99 — I. zubowskii; 100 — I. aff. camptoxypha; 101 — I. gulae; 102 — I. obtusa; 103 — I. amplipennis; 104 — I. speciosa. Scale (if present) = 2 mm.

FIGURES 105 – 129. Female abdominal terminalia of the Balkan Isophya and I. yaraligozi (localities as in Figs 31 – 55 unless specifically given); figures of the whole ovipositor are followed by enlarged figure of the ovipositor base: 105 — I. hospodar (BG: Dolni Glavanak, 25.04. 2005, CC); 106 — I. rectipennis (BG: Byala Vill., 27.06. 2002, CC); 107 — I. pavelii (BG: Chernogorovo, 29.05. 2006, CC); 108 — I. thracica; 109 — I. bureschi (BG: Bansko, 8.08. 2006, CC); 110 — I. yaraligozi; 111 — I. tosevski; 112 — I. andreevae (BG: Kresnensko Hanche, 19.04. 2006, CC); 113 — I. clara; 114 — I. miksici (BG: Gorski Dom Lodge, 24.06. 2006, CC); 115 — I. plevnensis (BG: Levishte, 14.07. 2009, CC); 116 — I. longicaudata adamovici (BG: Karandila, 24.06. 2008, CC); 117 — I. l. longicaudata (BG: Sofia University Botanical garden, 26.06. – 1.07.2004, CC); 118 — I. m. modesta (= intermedia); 119 — I. rhodopensis leonorae (BG: Livade, 9.08. 2006, CC); 120 — I. rh. rhodopensis (BG: Bachkovo, 600 m, 23.05. 2004, CC); 121 — I. rh. petkovi (BG: Gluhite Kamani, 23.06. 2008, CC); 122 — I. modestior (BG: Bankya, 24.05. 2006, CC); 123 — I. dobrogensis; 124 — I. zubowskii; 125 — I. aff. camptoxypha (data as in Fig. 75); 126 — I. gulae; 127 — I. obtusa (BG: Ravnets Ridge, 14.07. 2009, CC); 128 — I. amplipennis (as in Fig. 78); 129 — I. speciosa (BG: Bankya, 24.05. 2006, CC). Indications on Fig. 127 show, respectively: G—gonangulum; L—lamella; P—lateral pit between lamella and gonangulum. Scale (if present) = 5 mm.

FIGURES 174 – 181. SEM of taxonomically important structures of Isophya: 174 — I. dobrogensis (RO: Popina Island); 175 — I. zubowskii (RO: Babadag, NMB); 176 — I. camptoxypha (RO: “ Bucec b. Sinaia, 13 – 1800 m, 25.8. 41, Ramme ”, NMB); 177 — I. gulae (BG: Elhovo, Dolna Topchiya Resrve); 178, 179 — I. obtusa (178 — BG: Lyulin Mt.; 179 — Pleven Lodge); 180 — I. amplipennis (TR: near Sogut); 181 — I. speciosa (BG: Kovach Locality). A—male stridulatory file (174 – 179 — scale 200 μm; 180, 181 — scale 100 μm); B—ventral / ventro-apical view of apex of male cerci (scale 100 μm); C—female stridulatory apparatus (scale 100 μm; for 175 C— 200 μm).

FIGURES 182 – 189. Male calling song at two different speeds (air temperature at recording shown; time scale below): 182, 183 — I. modestior (182 — BG: Vitosha Mt.; 183 — Serbia: Novi Sad); 184 — I. dobrogensis (RO: Popina Island); 185 — I. zubowskii (RO: Dobrogea, Niculiţel); 186 — I. camptoxypha (RO: Ciucaş Mt.); 187 — I. gulae (BG: Elhovo, Dolna Topchiya Reserve); 188, 189 — I. obtusa (188 — Middle Stara Planina Mts, Pleven Lodge; 189 — BG: Vitosha Mt.). Arrow and a “ Ƥ ” symbol on fig. 187 indicate the response of a female I. gulae.