Hydredes shchetkini Volynkin, Matov & Gyulai

Volynkin, Anton V., Matov, Alexej Yu., Gyulai, Péter & Behounek, Gottfried, 2014, A revision of the genus Protarchanara Beck, 1999 with description of a new genus and three new species (Lepidoptera, Noctuidae, Xyleninae), Zootaxa 3755 (2), pp. 165-178 : 167-168

Hydredes shchetkini Volynkin, Matov & Gyulai , sp. n.

( Figs 6–9 , 33, 34 , 48 )

Type material. Holotype: male, 31.v. [19]49, Old pier on the Vakhsh River, 12 km S of Jilikul, at light. Noctuid moth. Yu. Shchetkin [leg.] [in Russian] / " Hydraecia " praecipua Hacker, No. 1376 Gyulai / Coll. Dr. P. Gyulai, Miscolc. Slide 1376 Gyulai (Coll. PGM). Paratypes: 38 males, 3 females, 16–31.v.1949, same locality and collector (Coll. PGM); 4 males, 1 female, 26.v.–2.vi.1948, same locality and collector, (Coll. PGM); 1 male, SW Tajikistan, Tigrovaya Balka Reserve, 22.v.1965, leg. A. Tsvetaev, ex coll. A.V. Nekrasov, prep. 1404 Nekrasov, Hydraecia praecipua Hacker & Nekrasov , Paratype, Esperiana , 8: 826 (Coll. ZISP); 1 female, [ Tajikistan], 31.v.1949, Old pier on the Vakhsh River, 12 km S of Jilikul, at light. Noсtuid moth. Yu. Shchetkin [leg.], ex coll. Dr. P. Gyulai, ex coll. A.V. Nekrasov, Cosmia cortodes L. Ronkay det., Hydraecia praecipua Hack. & Nekr. (Coll. ZISP). Slides 988m, 3280m Gyulai (males), 1377f, 3281f Gyulai, AV0752 Volynkin (females).

Diagnosis. The new species is close to H. praecipua and H. yakobsoni . It externally differs from H. praecipua by paler, ochreous-brown colouration of forewings; from H. yakobsoni it differs by dark ochreous-brown colouration of forewings, much darker, brownish hindwing and more expressed pattern with brown, almost straight postmedial line. The male genitalia of H. shchetkini differ from H. praecipua by narrower uncus with obtuse apex, somewhat smaller cucullus, somewhat shorter digitus, broader vesica and thinner claw-like cornutus with more acute tip; from H. yakobsoni differ by pointed apex of uncus, less separated cucullus, shorter digitus, subbasally broader vesica, longer and thinner cornutus with more pointed tip; from H. delattini differ by smaller juxta, larger and more separated cucullus, shorter digitus and costal process and the presence of only one cornutus in the vesica. The female genitalia differ from H. yakobsoni by shorter apophyses anteriores, narrower antrum and semilunar sclerotised plate of appendix bursae.

Description. Adult ( Figs 6–9 ). Wingspan 25–27 mm, length of forewing 10–11 mm. Head and palpi greyishbrown, palpi short, upcurved. Forewing short, triangular. Ground colour of forewing ochreous-brown. Pattern diffuse. Antemedial line indistinct, present as pale, almost straight line; postmedial line thin, pale, more or less diffuse, almost straight, somewhat curved on the cell; subterminal line pale, thin, indistinct, irregularly wavy. Orbicular and reniform indistinct, with diffuse, thin pale border. Cilia short, brown. Ground colour of hindwing monotonous brown or ochreous-brown, basally somewhat paler. Cilia brown. Male genitalia ( Figs 33, 34 ). Uncus moderately long, narrow, curved, apically obtuse. Tegumen short, penicular lobes relatively small, rounded. Juxta wide, pentagonal. Vinculum short, U-shaped. Valva elongate, narrow; clavus smooth, costa weakly sclerotised; digitus moderately long, thin, apically pointed, form an acute angle with costa. Cucullus small, rounded, hardly separated; corona present. Aedeagus moderately long, distally slightly curved; vesica membranous, broad, dorsally directed, its distal part with long, robust, apically pointed claw-like cornutus. Female genitalia ( Fig. 48 ). Ovipositor weakly sclerotised, pointed. Apophyses anteriores and posteriores thin, long. Antrum broad, with thin sclerotised margin. Ductus bursae short, membranous, its anterior part sclerotised. Corpus bursae very long, narrow, membranous, its posterior part sclerotised. Appendix bursae broad, bulbous, strongly sclerotised, ventrally with strongly sclerotised semilunar plate.

Distribution. The species is known from two localities in the Vakhsh Valley, southwestern Tajikistan.

Etymology. The species name is dedicated to Yu. Shchetkin, the collector of most of the types.

Figures

FIGURES 1 – 10. Hydredes spp., adults. 1, H. yakobsoni, holotype male, Semirechje (ZISP); 2, H. yakobsoni, paratype male, SE Kazakhstan, Almaty Region (GRB); 3, H. yakobsoni, paratype female, same locality (GRB); 4, H. yakobsoni, paratype female, Kyrgyzstan, Naryn region (PGM); 5, H. praecipua, holotype male, North Caucasus, Daghestan (ZMMU); 6, H. shchetkini, holotype male, Tajikistan (PGM); 7, H. shchetkini, paratype male, Tajikistan (PGM); 8, H. shchetkini, paratype female, Tajikistan (PGM); 9, H. shchetkini, paratype female, Tajikistan (ZISP); 10, H. delattini, holotype male, Iran, Shiraz (BMNH) (photo by A. Giusti).

FIGURES 31 – 36. Hydredes spp., male genitalia. 31, H. yakobsoni, holotype, Semirechje, slide 0038 Matov; 32, H. yakobsoni, paratype, SE Kazakhstan, slide RL 10727 m L. Ronkay; 33, H. shchetkini, holotype, Tajikistan, slide 1376 P. Gyulai; 34, H. shchetkini, paratype, slide 988 m P. Gyulai; 35, H. praecipua, holotype, slide 10439 Hacker (after Hacker 2001); 36, P. delattini, holotype, Iran, Shiraz, slide Wiltshire 477 (photo by A. Giusti).

FIGURES 43 – 52. Hydredes and Protarchanara spp., male (Figs 43 – 46) and female (Figs 47 – 52) genitalia. 43, P. mythimnoida, paratype, SE Kazakhstan, slide 6755 m Z. Varga; 44, P. brevilinea brevilinea, W Siberia, prep Volynkin; 45, P. brevilinea impudica, lectotype, slide 12127 GB Behounek; 46, P. brevilinea impudica, Russian Far East, prep. Matov; 47, H. yakobsoni, paratype, SE Kazakhstan, slide RL 10728 f L. Ronkay; 48, H. shchetkini, paratype, slide 1377 f P. Gyulai; 49, P. abrupta, SW Mongolia, slide AV 0755 Volynkin; 50, P. mythimnoida, paratype, SW Kazakhstan, slide 623 f P. Gyulai; 51, P. brevilinea brevilinea, W. Siberia, prep. Volynkin; 52, P. brevilinea impudica, paralectotype, slide 12153 GB Behounek.