Dirhinosia interposita , Bidzilya, Oleksiy V. & Budashkin, Yury I., 2015

Bidzilya, Oleksiy V. & Budashkin, Yury I., 2015, New species of Gelechiidae (Lepidoptera) from Ukraine, Zootaxa 3974 (2), pp. 217-230: 226-229

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Dirhinosia interposita

sp. n.

Dirhinosia interposita  sp. n.

Dirhinosia unifasciella sensu Bidzilya et al., 2013: 24  , Pl. 2, fig. 1.

Material. Holotype, ♀, Crimea, Koktebel vic., SW slope of Uzun-Syrt, evening collection, 12.vi. 2011 (Budashkin) ( ZMKU). Paratypes: 2 ♀, same data as holotype but 8.vi. 2011 (gen. slide 85 / 14, O. Bidzilya); 1 ♂, 1 ♀, same data but 20.v. 2014; 2 ♂, same data but 21.v. 2014; 2 ♂, 1 ♀, same data but 22.v. 2014; 7 ♂, same data but 23.v. 2014 (gen. slide 347 / 14 ♀, O. Bidzilya); 3 ♂, 1 ♀, same data but 25.v. 2014 (all ZMKU).

Comparative material studied. Lectotype of Rhinosia unifasciella  , Asia min. c., Ak.- Tschiftlik, 20.- 31.Mai. 28, Coll. Wagner-Wien (gen. pr. No 7443, Z. Tokar, ♂; = gen. prep. 565 / 14, O. Bidzilya); paralectotype of Rhinosia unifasciella  , same data as lectotype (gen. pr. No 7444, Z. Tokar, ♀; = gen. prep. 566 / 14, O. Bidzilya) ( MNHW).

D. cervinella (Eversmann, 1844)  : 1 ♂, Ukraine, [Donetsk reg.] z-k Provalskaya step, 11.vi. 1997, light (Kostjuk) (gen. slide 96 / 14, O. Bidzilya); 1 ♂, Ukraine, [Donetsk reg.] z-k Provalskaya step, 12.vi. 1999 (Pak) ( ZMKU); 4 ♂, 2 ♀, Ukraine, Luhansk reg., Melovoi distr., z-k Streltsovskaya step, 5,6,9. vii. 2002, light (Bidzilya) (gen. slide 102 / 14 ♂, ♀, O. Bidzilya); 2 ♂, SE Ukraine, Donetsk reg., z-k Khomutovskaya step, 2-4.vii. 2001 (Rutjan); 2 ♂, Ukraine, Nikolaev reg., Elanetskiy distr., Antonovka vic., 4.vi. 2012 (Zhakov) (gen. slide 91 / 14, O. Bidzilya) (all ZMKU).

Description. Adult ( Figs. 33, 34View FIGURES 33 – 36). Head: Yellowish-white, labial palpus up-curved, white, segment 3 about one half length of and about 1.5 times narrower than segment 2, acute; scape off-white, other antennal segments brown with white basal annulations.

Thorax: Dorsum and tegulae ochreous; wingspan 14.2–17.2 mm; forewing light brown, basal 1 / 5 lighter than rest of wing, with white interfascial band extending obliquely from ¼ of costal margin to about 1 / 2 of dorsal margin, narrowing near dorsum and not reaching it; cilia reddish, brown-tipped; hindwing broader than forewing, dark grey.

Abdomen: Male genitalia ( Figs. 37, 38View FIGURES 37 – 41) with uncus long, narrow, pointed apically, curved ventrally; gnathos absent; tegumen subtrapezoid, base strongly broadened, posterior margin 1 / 3 as long as anterior margin; valva parallel-sided, gradually curved, setose after 1 / 3 length, apex rounded, as long as tegumen; sacculus about half as long as valva, basal half 1.5–2.0 times width of valva, distal half as wide as valva, apex rounded; vinculum narrow, band-shaped; phallus swollen in basal half, distal half moderately narrow, vesica with numerous short spinules, beak-shaped; ductus ejaculatoris very long with coiled lamina. Variation expressed in junction of broad basal and narrow distal portion of sacculus, either joined at right angle or forming a gradual transition. Female genitalia ( Fig.View FIGURES 42 – 44

42) with papillae anales narrow, elongate, setose; apophyses posteriores straight, broadened at apex, a little more than 2 times length of segment VIII; segment VIII slightly longer than broad, weakly narrowed distally, posterior margin triangularly invaginated, setose; sternite VIII evenly sclerotized, two narrow sclerotized bands from middle of posterior margin to about the base of apophyses anteriores, medial slot deep and narrow, lateral margins folded, two small rounded membranous windows at about half length near lateral margins; apophyses anteriores straight, shorter than segment VIII; antrum weakly broadened posteriorely, colliculum distinct, band-shaped; ductus bursae extremely long, mostly uniform in width but slightly narrowed before colliculum and gradually broadened before corpus bursae; corpus bursae egg-shaped; signum a transverse, elongate spinous plate, posterior margin with weakly sclerotized triangular process in middle.

Diagnosis. As a result of a recent review of the genus Dirhinosia  , four species have been recognized as valid ( Tokár & Gozmány 2004). The new species described above is superficially similar to D. unifasciella Rebel, 1929  ( Figs. 35View FIGURES 33 – 36, 39View FIGURES 37 – 41, 43View FIGURES 42 – 44), whereas the genitalia of both sexes are nearly undistinguishable from those of D. cervinella Eversmann, 1844  ( Figs. 36View FIGURES 33 – 36, 40, 41View FIGURES 37 – 41, 44View FIGURES 42 – 44). Adults of the new species can be recognized by the white interfascial band that is weakly curved at about 1 / 5 – 1 / 6 length, in contrast to the straight one in D. unifasciella  . The male genitalia differ from those of the last species in the narrower apical portion of the sacculus. We were unable to find reliable differences in the male genitalia between D. interposita  and D. cervinella  . The female genitalia of all three species can be separated most reliably by the shape of the basal plate of the signum which is longest in D. interposita  ( Fig. 42View FIGURES 42 – 44 a). The signa of D. unifasciella  and D. cervinella  are shorter, rather similar to each other ( Figs. 43View FIGURES 42 – 44 a, 44 a), but the signum of D. cervinella  has more spines, and its lateral lobes are more rounded. There are also differences in the length of ductus bursae: the longest is characteristic of D. interposita  , whereas the ductus of the two last species are subequal in length. However, the length of the ductus bursae is variable, at least in D. cervinella  (see Tokár & Gozmány 2004: 70, figs. 15, 16).

Biology. Host plant unknown. Adults were collected in the third week of May and the first half of June in the lower part of southwestern steppes slopes of Uzun-Syrt hill. The collecting locality is restricted to small mesophilous meadow-steppes at the bottom of a very narrow depression (nearly 200 m long and not more than 10 m wide).

Distribution. Ukraine: Eastern Crimea.

Etymology. The specific name refers to the intermediate position of the new species between D. unifasciella  and D. cervinella  .

Remarks. The genitalia of the male (lectotype) and female (paralectotype) of D. unifasciella  have been examined during the preparing the revision of this genus ( Tokár & Gozmány 2004). To compare the genitalia of this species with the related species, we removed them from a vial with glycerol and slide mounted them in euparal so that the male lectotype "gen. pr. No 7443, Z. Tokar, ♂" was relabeled as "gen. slide 565 / 14, O. Bidzilya"; the female paralectotype "gen. pr. No 7444, Z. Tokar, ♀" was relabeled as "gen. slide 566 / 14, O. Bidzilya".


Kiev Zoological Museum














Dirhinosia interposita

Bidzilya, Oleksiy V. & Budashkin, Yury I. 2015

Dirhinosia unifasciella sensu Bidzilya et al., 2013 : 24

Bidzilya 2013: 24