Obscura lateraprocessa Fibiger

FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, Zootaxa 2583 (1), pp. 1-119 : 69

Obscura lateraprocessa Fibiger , new species

( Plate 8 , figure 4; male genit. plate 18, figure 1)

Material examined. Holotype: male, Indonesia, N Sumatra, HW II, 28 km S P. Siantar, near Tigadoluk, 2’45’52

N, 99’58’20 E, 1050 m, 10.ii.2002, leg. & genit. prep. 6092 M. Fibiger, coll. MF, later to be deposited in ZMUC. Diagnosis. Imago (external). Wingspan: 12 mm. Head, patagia, anterior part of tegulae, prothorax, basal part of costa, costal part of medial area, fringes:

black, costal medial area quadrangular. Forewing ground colour: light brown, suffused with brown patches and few black scales. Abdomen: grey, with dorsal tuft on basal segment. Crosslines: all lines indistinct (apo.). Terminal line: well marked by dark-brown interneural dots. Reniform stigma: beige, ovoid. Hindwing: grey, without discal spot. Underside: forewing brown; hindwing light grey, with discal spot. Male genitalia. Tegumen: narrow, shorter than vinculum, peniculus overlapping dorsal end of vinculum

(apo.); Vinculum: narrow, very long (apo.). Saccus: short, V shaped. Fultura superior: attached to tegumen as two small flaps (apo.) Valvae: relatively narrow, slightly asymmetrical. Clasper: barlike, slightly oblique to valva margins. Ampulla: relatively small, slightly asymmetrical, broadly ovoid. Digitus: large, curved, spinelike, positioned dorsad beyond ampulla (apo.). Juxta-annellus plate: triangular with rounded edges, hole for phallus (apo.). Phallus: basally almost straight; broadest by ductus ejaculatorius; tapered; at 3/5 curved 110 o (apo.). Vesica: with short platelike cornutus. Bionomics. One known specimen of O. lateraprocessa was attracted to HG light in primary forest. Differential diagnosis. O. lateraprocessa differs from other Obscura species in: - large size; - indistinct crosslines; male genitalia, in - short tegumen with small processes; - extremely long vinculum; - long, spinelike digitus; - prominently curved phallus. Distribution. O. lateraprocessa known only from Indonesia, North Sumatra.

Figures

PLATE 8. Figures 1–8. Clarior and Obscura species, adults. 1, Tantulius belli, female holotype, abdomen lost, India S, Kawar; 2. Asylemissa comma, male holotype, NE Thailand, Chaiyapumh Distr.; 3, Clarior kitchingi, male holotype, Thailand N, Dot Phu Kha Nat. P.; 4, Obscura lateraprocessa, female holotype, Indonesia, N. Sumatra; 5, O. clarus, male holotype, Indonesia, West Sumatra; 6, O. niasiensis, male holotype, Indonesia, S Nias Isl.; 7, O. fragilis, female holotype, Thailand NW, Mae Hong Son; 8, O. davisi, male paratype, Sri Lanka, District, Chundikkulam Sanct.