Mimachrostia fasciata Sugi, 1982

Fibiger, Michael & Kononenko, Vladimir S., 2008, Revision of the Micronoctuidae species occurring in the Russian Far East and neighbouring countries with description of a new species (Lepidoptera, Noctuoidea), Zootaxa 1890, pp. 50-58 : 56-57

Mimachrostia fasciata Sugi, 1982

( Figs. 4 , 9 , 12 , 14 )

Mimafascia fasciata Sugi, 1982 . In Inoue et al., Moths of Japan Vol. 2: 892. Type-locality: Japan, Honshu, Gumma Pref., Numata.

Material examined. M. fasciata is known from many collecting sites in North and South Korea, Japan, China, and Russia. In Russia, Primorye terr. occurring in De-Friza Peninsula (near Vladivostok); Ryazanovka, Khasansky region; Zanadvorovka, Gornotaezhnoe, Kraunovka, Arsenjev, Lazovsky Nature reserve (43°16ˏN, 134°0 8ˏE), Scherbakovka. The new and northernmost data are as follows: 1 female, Khabarovsk terr., vicinity of Khabarovsk, Bolshehechtsirsky nature reserve, (48°11ˏN, 134°42ˏE, 14.vii 2005), V. Dubatolov leg.; 1 male, Khabarovsk terr., vicinity of Komsomolsk, Komsomolsky nature reserve, Pivan’ (50°31ˏN, 137°0 35ˏE), 14–19. vii. 2007, V. Dubatolov leg. (coll. ZM IASE, Novosibirsk).

Diagnosis. Imago ( Fig. 4 ). Wingspan 12–15 mm. Head, patagia, and costal part of basal area of forewing dark brown; forewing relatively narrow; light brown, often with indistinct, narrow, beige reniform stigma; antemedian and postmedian crosslines well marked, waved; subterminal line weakly marked; terminal line marked by black interveinal spots. Hindwing greyish brown; with an indistinct discal spot. Underside of costal 3/4 part of forewing brownish, otherwise grey-brown, without pattern; underside of costal 1/3 part of hindwing brownish, lower part light grey, with discal spot. Abdomen light brown, with light brown tuft present dorsally on the first two segments. Male genitalia ( Fig. 9 ). 8th sternite with deep crest, with posterior processes; 8th tergite plate-like, with four narrow processes anteriorly. Tegumen strongly built, dorsally quadrangular with two vertical, parallel arms; vinculum and saccus strongly built, the latter broad, U-shaped; fultura superior not visible; juxta-anellus plate fused, three times wider than high, broadest ventrally, with a narrow string-like ring dorsally, and with a hole for aedeagus, the hole slightly dislocated to the left. Valva narrow, broadest medially; clasper positioned across, 90 degrees to margins of valva; ampulla prominently asymmetrical, positioned in extension of valva, with smaller dorsal arm; digitus very short; finger-like. Aedeagus relatively long, heavily curved through 100 degrees, coiling clock-wise, slightly tapered, and with crest-like plate by ductus ejaculatorius; vesica unarmed. Female genitalia ( Fig. 12 ). Posterior apophyses half the length of fused 7th–8th abdominal segment; anterior apophyses reduced to tiny processes; 8th abdominal segment totally fused to 7th, laterally as long as 7th, ventrally and dorsally gradually strongly constricted; ostium bursae positioned on dorso-lateral side at the end of the cone-like entrance; antrum narrow, long, heavily sclerotised, curved subapically; ductus bursae membranous, long and narrow, twice as long as corpus bursae; corpus bursae elongate, pear-shaped, with cross-shaped signum.

Bionomics and distribution ( Figs. 5, 6 , 14 ). The species occurs in rich broadleaved forests ( Figs 5, 6 ), to the northern limit of these habitats in the basin of the middle of the Amur river: 50°31ˏN, 137°0 35ˏE. Adults were collected at light from May to September; in southern regions there are probably two generations. The species is not common. The early stages are unknown. Mimachrostia fasciata is widely distributed in the Primorye and south Khabarovsk Territories. Outside Russia it occurs on the Korean peninsula, including Jeju Island; possibly in China; in Japan it occurs on the northern islands, northwards to Hokkaido (Oiwake).

Note. Mimachrostia fasciata was originally described from Japan ( Sugi 1982) in the Noctuidae subfamily Ophiderinae . It was first reported from Russia by Sviridov (1990), and later by Dubatolov & Zolotarenko (1997), and it was included in the Key for identification of insects of the Russian Far East in the subfamily Catocalinae ( Sviridov 2003) . Mimachrostia fasciata was listed by Kononenko (2005) from Russian Far East in the family Micronoctuidae . From South Korea it was first reported by Ronkay & Park (1993), and by Ahn et al. (1995) from Jeju Island. From North Korea it was reported by Park et al. (2001). Mimachrostia fasciata was included in the catalogue of Korean Noctuidae ( Kononenko et al. 1998) in the subfamily Ophiderinae , and as Micronoctuidae by Kononenko & Han (2007).

Figures

FIGURES 1 – 6. Micronoctuidae sp., adults. 1, 2, Micronoctua occi, males, paratypes, South Korea; 3, Micronoctua karsholti, male, Turkey; 4, Mimachrostia fasciata, Russia, male, Khabarovsk Territory, Komsomolsk (50 ° 31 N, 137 ° 035 E); 5, 6, Broadleaved forest in south of Primorye Territory, Russia, typical habitat of Micronoctua occi and Mimachrostia fasciata.

FIGURES 7 – 9. Micronoctuidae sp., male genitalia. 7, Micronoctua occi, paratype, South Korea, Praep. 971218 / 14 VSK; 8. Micronoctua karsholti, Turkey, Prep. MF; 9, Mimachrostia fasciata, Russia, Primorye, Prep. 3623 MF.

FIGURES 10 – 12. Micronoctuidae sp., female genitalia. 10, Micronoctua occi, females South Korea, Praep. 2818 Byun, KNA; 11, Micronoctua karsholti, female, Turkey, Prep. MF; 12, Mimachrostia fasciata, Russia, Prep. MF.

FIGURES 13 – 14. Distribution maps for Micronoctua occi (13) and Mimachrostia fasciata (14).