Istrianis sattleri, 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 : 427-428

8. Istrianis sattleri sp. nov.

Material examined. Holotype ♂, [ Pakistan, Punjab], Kuldana, 27.iv. [19]67 | Larva stiching leaves of Q. dilatata | C.I.B.C., Ls. 4/67-117 | 338 | Istrianis sp. nov., det. K. Sattler, 1967 | B.M. Genitalia slide No, 14355 ( BMNH). Paratypes: 1♀, same data as holotype (B.M. Genitalia slide No. 14359); 2♀, same data, but 29.iv.1967; 1♂, 1♀, same data, but 18.iv.1967 (B.M. Wing slide No. 14356) (gen. slide 413/ 14♂, O. Bidzilya) (all BMNH).

Adult ( Figs 27, 28 ). Wingspan 10.8–11.1 mm. Head covered with grey, black-tipped scales; segment 2 of labial palpus grey with black medial and subapical rings, inner and upper surface off-white; scape black with grey apex, antennal segments ringed black and grey; thorax and tegulae as head; forewing greyish black, basal 1/4 black with outer margin uneven; diffuse elongated black subcostal spots in medial 1/3; black irroration along dorsal margin in distal 1/3 and in apical area; three black spots surrounded with a few brown scales in cell, brown dot before middle under costal margin; black spot at 2/3 of dorsum; some brown scales below costal margin; cilia tipped grey and black; hindwing grey.

Male genitalia ( Figs 67, 68 ). Tergite VIII triradial, distal lobe subequal in shape to lateral lobes, anterior emargination short, rounded; sternite VIII two times broader than long, broadening posteriorly, anterior and posterior margin parallel, posteriolateral projections short, rounded; uncus moderately prolonged, gradually narrowed apically after middle, densely haired, top rounded; gnathos longer than uncus, of moderate width, distal sclerite narrow, straight, dorsal surface covered with small teeth; tegumen narrow, prolonged, anteromedial emargination triangular, extending to about 1/3 length, lateral lobes broad; valva weakly sclerotized, strongly dilated in middle, ventral margin straight, dorsal margin strongly sclerotized, distinctly curved in middle, apex pointed; phallus longer than valva, triangular, apically tapered.

Female genitalia ( Figs 94 , 123 ). Sternite VIII subrectangular, two times longer than broad; apophyses posteriores long and narrow; posterior sclerite elongated, subrectangular, anterolateral sclerites large, leaf-shaped, pointed posteriorly, outer margins strongly edged in basal half, anterior sclerites very narrow; subostial folds strongly sclerotized, extending to half length of sternite VIII; antrum narrow, funnel-shaped; apophyses anteriores moderately thick, straight, subequal in length to segment VIII; ductus bursae gradually broadened towards corpus bursae, distal portion with group of small teeth; corpus bursae globular; signum subhexagonal with narrow medial ridge, margins serrated.

Diagnosis. I. sattleri externally resembles I. pseudomyricariella , but the ochreous spots are less distinct. It is also similar to I. brucinella , but the forewing is darker, grey rather than light brown and markings are black in contrast to brown in the latter species. The distal sclerite of gnathos covered with small teeth in the male genitalia is a character that reliably differentiates I. sattleri from other Istrianis species. Generally the male genitalia resemble those of I. wachtlii having the distal sclerite of gnathos not curved and sacculus inflated, but the gnathos of the new species is distinctly longer than uncus, and valva is broadened in middle rather than in apical half in I. wachtlii . Both species have rather similar triradial male tergite VIII. The female genitalia are characterized by the elongated posterior sclerite, the large sclerotized ring around the ostium opening and presence of small teeth in the distal portion of the ductus bursae.

Biology. The larva feeds between spun (‘stitching‘) leaves of Quercus floribunda Lindl. ex A. Camus (as ’ Quercus dilatata ’). Adult emerged from larvae collected in the second half of April.

Distribution. Pakistan.

Etymology. The species is named in honour of Dr. K. Sattler, who first recognized this species as new.

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 63 – 68. Male genitalia of Istrianis species. 63 — I. kravchenkoi, Palestine, (gen. slide 5699, H. Hendriksen); 64 — I. wachtlii, Palestine (gen. slide 37 / 11, O. Bidzilya); 65 — I. brucinella, Egypt (gen. slide 401 / 14, O. Bidzilya); 66 — I. brucinella, Pakistan (B. M gen. slide 23777); 67 — I. sattleri, Pakistan (gen. slide 413 / 14, O. Bidzilya); 68 — I. sattleri, Pakistan (B. M. gen. slide 14355).

FIGURES 93 – 95. Female genitalia of Istrianis species. 93 — I. brucinella, Pakistan (gen. slide 185 / 14, O. Bidzilya); 94 — I. sattleri, PT, Pakistan (B. M. gen. slide 14359); 95 — I. armatus, PT, Pakistan (gen. slide 568 / 14, O. Bidzilya).

FIGURES 108 – 125. Female genitalia of Istrianis species, sternite VIII. 108 — I. myricariella, Germany (B. M. gen. slide 6255); 109 — I. myricariella, Bulgaria (gen. slide 179 / 14, O. Bidzilya); 110 — I. myricariella, Tunisia (gen. slide 271 / 14, O. Bidzilya); 111 — I. arenicolella, PLT, Algeria (gen. slide 64 / 13, O. Bidzilya); 112 — I. arenicolella, Spain (gen. slide 263 / 12, O. Bidzilya); 113 — I. arenicolella, Spain (gen. slide 269 / 14, O. Bidzilya); 114 — I. pseudomyricariella, PT, Kyrgyzstan (gen. slide 11 / 13, O. Bidzilya); 115 — I. pseudomyricariella, HT, Kyrgyzstan (gen. slide 70 / 11, O. Bidzilya); 116 — I. pseudomyricariella, PT, Tadzhikistan (gen. slide 351 / 14, O. Bidzilya); 117 — I. nilssoni, HT, Greece (gen. slide 5519, H. Hendriksen); 118 — I. nilssoni, PT, Greece (gen. slide 6147, H. Hendriksen); 119 — I. kravchenkoi, PT, Greece (gen. slide 5947, H. Hendriksen); 120 — I. wachtlii, Egypt (gen. slide 62 / 10, O. Bidzilya); 121 — I. brucinella, Egypt (gen. slide 266 / 12, O. Bidzilya); 122 — I. brucinella, Pakistan (gen. slide 185 / 14, O. Bidzilya); 123 — I. sattleri, PT, Pakistan (B. M. gen. slide 14359); 124 — I. armatus, PT, Pakistan (gen. slide 568 / 14, O. Bidzilya); 125 — I. femoralis, Kyrgyzstan (gen. slide 100 / 13, O. Bidzilya);