Istrianis sruogai, Bidzilya, Oleksiy & Karsholt, Ole, 2015

Bidzilya, Oleksiy & Karsholt, Ole, 2015, Revision of the genus Istrianis Meyrick, 1918 (Lepidoptera, Gelechiidae) with special regard to the Palaearctic region, Zootaxa 4059 (3), pp. 401-445 : 432-434

14. Istrianis sruogai sp. nov.

Material examined. Holotype ♀, South. Tadzhikistan, Tigrovaya Balka, env. Dzhilikul, 27.07.1990, V. Sruoga (gen. slide 175/14, O. Bidzilya) ( ZMUC). Paratypes: 1♀, same data as holotype, but 12.vii.1990; 3♂, 4♀, same data as holotype, but 13.vii.1990; 1♂, 4♀, same data as holotype, but 26.vii.1990; 1♂, same data as holotype, but 27.vii.1990; 1♂, same data as holotype, but 19.viii.1990; 1♂, 1♀, same data as holotype, but 17.viii.1990 (gen. slide 174/ 14♂, O. Bidzilya); 1♂, 2♀, Turkmenistan, Tedžen, 7.viii.1989 (Sruoga) (gen. slide 178/14♀, O. Bidzilya); 1♀, Jeletan, 13.viii.1988 (Sruoga) ( ZMKU, ZMUC).

Adult ( Figs 35, 36 ). Wingspan 7.6–8.0 mm. Head, thorax and tegulae light grey with a few black scales, frons lighter, off-white, labial palpus white with black basal and subapical rings; scape greyish black, other antennal segments black with light grey basal rings. Female abdominal segments I–V black on dorsum. Forewing greyish black, costal margin with black marks at 1/3, in middle and at 2/3, a light brown subcostal dash at 1/3 under black mark, light brown spots before and after the middle below costa, single orange scales in subapical 1/3; cilia grey, black-tipped; hindwing and cilia light grey.

Variation. The paratype (female) from Turkmenistan is smaller and looks lighter grey, rather than nearly black specimens from Tadzhikistan.

Male genitalia ( Fig. 74 ). Distal portion of tergite VIII slightly longer than broad, tongue-shaped, apically rounded, anterolateral lobes very narrow, anteromedial emargination broad, its distal portion rounded; sternite VIII comparatively narrow, more than two times as long as broad, anterolateral projections long; uncus nearly parallelsided, slightly narrowed before apex, about as broad as base of gnathos; gnathos longer than uncus, parallel-sided, just slightly narrowed before apex which bears a strongly sclerotized hook; tegumen boomerang-shaped, lateral lobes parallel-sided, anteromedial emargination broadly rounded; valva broad, strongly inflated in distal half; phallus weakly narrowed in middle, apex nearly rounded, longer than valva.

Female genitalia ( Figs 98 , 99 , 128, 129 ). Segment VIII trapezoidal; apophyses anteriores two times longer than segment VIII; anterior margin with prolonged lobes; posterior sclerite small, subquadrangular; anterolateral sclerite oxhorn-shaped; antrum tubular; ductus bursae long; corpus bursae ovate; signum subhexagonal, posterior lobe moderately narrow, anterior lobe broader and shorter than posterior lobe, medial emargination moderately to strongly deep, medial ridge narrow.

Variation. The female from Turkmenistan differs slightly in having broader posterior sclerite and narrower lobes of the signum.

Diagnosis. I. sruogai externally resembles I. falkovitshi , but differs from the latter and other Istrianis species in the small size in combination with black abdominal segments I–V in females. The male genitalia are similar to those of I. lvovskyi , but the uncus and gnathos are weakly narrowed distally and the uncus is apically rounded rather than pointed. The female genitalia are nearly indistinguishable from those of I. lvovskyi , but the lobes of the signum are smaller.

Biology. Host plant unknown. Adults were observed from late July to the last third of August.

Distribution. Turkmenistan, Tadzhikistan.

Etymology. I. sruogai is named after Virgilius Sruoga, Vilnius, Lithuania who collected the type series.

Figures

FIGURES 22 – 42. Adults of Istrianis species. 22 — I. kravchenkoi, ♂, HT, Palestine (gen. slide 5699, H. Hendriksen); 23 — I. wachtlii, ♂, Palestine (gen. slide 37 / 11, O. Bidzilya); 24 — I. wachtlii, ♀, Egypt (gen. slide 62 / 10, O. Bidzilya); 25 — I. brucinella, ♀, Egypt (gen. slide 266 / 12, O. Bidzilya); 26 — I. brucinella, ♀, Pakistan; 27 — I. sattleri, ♂, HT, Pakistan (B. M. gen. slide 14355); 28 — I. sattleri, ♂, PT, Pakistan (gen. slide 413 / 14, O. Bidzilya); 29 — I. armatus, ♂, HT, Yemen (gen. slide 567 / 14, O. Bidzilya); 30 — I. armatus, ♀, PT, Yemen (gen. slide 568 / 14, O. Bidzilya); 31 — I. femoralis, ♂, Kyrgyzstan; 32 — I. lvovskyi, HT, ♂, Mongolia (gen. slide 63 / 10, O. Bidzilya); 33 — I. lvovskyi, ♂, PT, Mongolia (gen. slide 252 / 12, O. Bidzilya); 34 — I. lvovskyi, PT, ♂, Mongolia; 35 — I. sruogai, PT, ♂, Tadzhikistan; 36 — I. sruogai, PT, ♀, Tadzhikistan (gen. slide 178 / 14, O. Bidzilya); 37 — I. piskunovi, HT, ♂, Ukraine (GU 96 / 630, P. Huemer); 38 — I. falkovitshi, HT, ♂, Turkmenistan (gen. slide 257 / 12, O. Bidzilya); 39 — I. falkovitshi, PT, ♀, Turkmenistan (gen. slide 10 / 13, O. Bidzilya); 40 — I. squamodorella, LT, ♂, Palestine (gen. slide 26 / 11, O. Bidzilya); 41 — I. squamodorella, PT, ♀, Palestine (gen. slide 26 / 11, O. Bidzilya); 42 — I. squamodorella, PT, ♀, Palestine.

FIGURES 69 – 74. Male genitalia of Istrianis species. 69 — I. armatus, Yemen (gen. slide 567 / 14, O. Bidzilya); 70 — I. femoralis, LT, Italia (gen. slide 96 / 579, P. Huemer); 71 — I. femoralis, Kyrgyzstan (gen. slide 42 / 11, O. Bidzilya); 72 — I. lvovskyi, HT, Mongolia (gen. slide 63 / 10, O. Bidzilya); 73 — I. lvovskyi, Mongolia (gen. slide 252 / 12, O. Bidzilya); 74 — I. sruogai, PT, Tadzhikistan (gen. slide 174 / 14, O. Bidzilya).

FIGURES 96 – 98. Female genitalia of Istrianis species. 96 — I. femoralis, Kyrgyzstan (gen. slide 100 / 13, O. Bidzilya); 97 — I. lvovskyi, PT, Mongolia (gen. slide 61 / 10, O. Bidzilya); 98 — I. sruogai, HT, Tadzhikistan (gen. slide 175 / 14, O. Bidzilya).

FIGURES 99 – 101. Female genitalia of Istrianis species. 99 — I. sruogai, Turkmenistan (gen. slide 178 / 14, O. Bidzilya); 100 — I. piskunovi, PT, Ukraine (gen. slide 92 / 11, O. Bidzilya); 101 — I. falkovitshi, PT, Turkmenistan (gen. slide 10 / 13, O. Bidzilya).

FIGURES 126 – 140. Female genitalia of Istrianis species, sternite VIII. 126 — I. lvovskyi, PT, Mongolia (gen. slide 61 / 10, O. Bidzilya); 127 — I. lvovskyi, PT, Mongolia (gen. slide 253 / 12, O. Bidzilya); 128 — I. sruogai, HT, Tadzhikistan (gen. slide 175 / 14, O. Bidzilya); 129 — I. sruogai, Turkmenistan (gen. slide 178 / 14, O. Bidzilya); 130 — I. piskunovi, PT, Ukraine (gen. slide 92 / 11, O. Bidzilya); 131 — I. falkovitshi, PT, Turkmenistan (gen. slide 10 / 13, O. Bidzilya); 132 — I. squamodorella, PT, Palestine (gen. slide 26 / 11, O. Bidzilya); 133 — I. squamodorella, Pakistan (B. M. gen. slide 14354); 134 — I. squamodorella, Pakistan (gen. slide 418 / 14, O. Bidzilya); 135 — I. nigrosquamella, PT, Iran (gen. slide 318 / 14, O. Bidzilya); 136 — I. nigrosquamella, Iraq (gen. slide 407 / 14, O. Bidzilya); 137 — I. kyrgyzsquamella, PT, Kazakhstan (gen. slide 259 / 12, O. Bidzilya); 138 — I. kyrgyzsquamella, PT, Kyrgyzstan (gen. slide 59 / 11, O. Bidzilya); 139 — I. yemeniasquamella, PT, Yemen (gen. slide 261 / 14, O. Bidzilya); 140 — I. yemeniasquamella, PT, Yemen (gen. slide 157 / 14, O. Bidzilya).