Metachrostis sinevi Matov & Kononenko

V, Ато, 2009, A review of Palaearctic Metachrostis Hübner, [1820] 1816 with description of three new species (Lepidoptera: Noctuidae, Eublemminae), Zootaxa 2026, pp. 1-17 : 11-13

Metachrostis sinevi Matov & Kononenko , sp. n.

( Figs. 17, 18 , 31 , 41 , 47 )

Material examined. Holotype: male, Primorye terr., Khasan district, Sukhanovka, 10.viii.1988 (S.Yu. Sinev), prep. 0 0 35 Matov [coll. ZISP]. Paratype: female, Khabarovsk terr., Bolshe-Khekhtsirsky nature reserve, Kazakevitchi, 2–3.ix.2007 (V.V. Dubatolov) [coll. SZM IASE]. The holotype is in the collection of Zoological Institute of the Russian Academy of Sciences ( ZISP, St. Petersburg, Russia); the female paratype is the Siberian Zoological Museum, Institute of Animal Systematics and Ecology ( SZM, IASE, Novosibirsk).

Diagnosis. Metachrostis sinevi is closest to M. miasma . The two are difficult to separate, but the wing coloration of M. sinevi has a more greyish tint, the basal and subbasal fields are darker, the postmedial line is straight and thin, the waved band in the subterminal field of the forewing is grey, and the hindwing is paler grey-brown with a less strongly expressed pattern. M. sinevi is reliably separated in the male genitalia, particularly by the valva being extended medially and apically, and by a shorter and wider aedeagus than in M. miasma , with a wider coecum and proximal extension.

Description. Adult ( Figs. 17, 18 ). Wingspan: 15–16 mm. Head, thorax, abdomen and wings greyishbrown, hindwing paler and more greyish; all crosslines on forewing black, on hindwing dark-brown; basal and subbasal fields grey-brown, darker ground color; medial line on forewing with wide suffused shadow at inner side; postmedial line less distinct and less waved than in M. miasma , bordered by thin grey suffusion; orbicular spot dark-brown; reniform spot greyish-brown with dark brown bordering; subterminal field between postmedial and submarginal lines with dark-brown waved band. Tergite 8th of male rectangular. Male genitalia ( Fig. 31 ). Uncus somewhat longer and thinner than in M. miasma ; valva narrow, with parallel margins, narrower basally, dorsal margin with triangular extension almost in middle of valva, distally clasper, ventral margin somewhat extended medially, then slightly constricted and extended distally; tip of valva extends dorsally. Aedeagus relatively short, wider than in M. miasma , with wide coecum; proximal extension of aedeagus wide, rounded. Female genitalia ( Fig. 41 ). Ovipositor small, papillae anales elongate; apophyses anteriores 2 times longer than posterior ones; antrum bocal-shaped with parallel lateral walls and small colliculum before joining with ductus bursae; ductus bursae thin, 2 times narrower than antrum; bursa pearlike, with long neck, twisted before joining with ductus.

Distribution ( Fig. 47 ). Russian Far East (Primorye and Khabarovsk terr.). The species was collected at light in a dry slope meadow with occasional oak trees ( Quercus dentata ) in south Primorye, and in lowland mixed broad-leaved forest in the vicinity of Khabarovsk. M. sinevi is the only species of Metachrostis found in the continental Far East and in Russia.

Figures

FIGURES 17 – 22. Eublemminae spp., adults. 17. Metachrostis sinevi, male, holotype, Russia, Primorye terr. (ZISP); 18. Metachrostis sinevi, male, paratype, Russia, Khabarovsk terr. (ZISP); 19. Metachrostis miasma, male (after Yoshimoto, 1999), Japan; 20. Odice arcuinna, female, Austria (ZFMK); 21. Eublemma amoena, female, Spain (Coll. G. Behounek); 22. Eublemma melabela, male, Tadjikistan (ZISP).

FIGURES 29 – 32. Metachrostis spp., male genitalia. 29. M. batanga, paratype, prep. 2090 VK ZFMK, China (ZFMK); 30. M. hoenei, paratype, prep. 2089 VK ZFMK, China (ZFMK); 31. M. sinevi, holotype, prep. 0 0 35 Matov, Russia, Primorye terr. (ZISP); 32. M. miasma, (after Yoshimoto, 1999), Japan.

FIGURES 37 – 45. Eublemminae spp., female genitalia. 37. Metachrostis dardouini, prep. 0 0 59 Matov, Hungary, Gant (ZISP); 38. M. velox, prep. 0 0 64 Matov, France (ZISP); 39. M. velocior, prep. 0 0 43 Matov, Malta (ZISP); 40. M. quinaria, prep. 0 0 42 Matov, North India (ZISP); 41. M. sinevi, paratype, prep. Dubatolov, in glycerine, Russia, Khabarovsk terr.; 42. Odice arcuinna, prep. 0 0 63 Matov, Hungary (ZISP); 43. Eublemma amoena, prep. 4767 GB, Spain (ZFMK); 44. Eublemma melabela, prep. 0 0 52 Matov (ZISP); 45. Rhypagia lacernaria, prep. 0 0 61 Matov, Spain (ZISP).

FIGURES 46, 47. Distribution maps for M. djakonovi (46) and M. sinevi and M. hoenei (47).