Obscura fragilis Fibiger

FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, Zootaxa 2583 (1), pp. 1-119 : 71

Obscura fragilis Fibiger , new species

( Plate 8 , figure 7; female genit. plate 25, figure 1)

Material examined. Holotype: female, Thailand NW, 30 km N Mae Hong Son, Karen village , 1100 m, 16.vii.2003, leg. & genit. prep. 4990 M. Fibiger, coll. MF, later to be deposited in ZMUC.

Diagnosis. Imago (external). Wingspan: 10 mm.

Head, patagia, anterior part of tegulae, prothorax, basal part of costa, and costal part of medial area: black, costal-medial area quadrangular.

Forewing ground colour: brown, dark brown in subterminal and terminal areas.

Crosslines: indistinct, terminal line marked by black interneural dots.

Reniform stigma: distinct, light yellow, brown outlined.

Hindwing: grey, with discal spot.

Underside: forewing brown; hindwing grey, with discal spot.

Female genitalia. Ovipositor: short, smoothly rounded posteriorly.

Posterior apophyses: 1.5 times longer than ovipositor (apo.).

Anterior apophyses: absent (apo).

7 th and 8 th segment: fused.

Ostium: small; displaced to left.

Antrum: narrow, cylindrical, 4 times longer than wide (apo.).

Ductus bursae: membranous, narrow, twice as long as corpus bursae.

Corpus bursae: ovoid.

Differential diagnosis. O. fragilis differs from other Obscura species in:

- brown ground colour, distally dark brown;

- reniform stigma light yellow, brown outlined;

female genitalia, in

- posterior apophyses 1.5 times longer than ovipositor;

- anterior apophyses absent;

- 7 th and 8 th segment fused;

- antrum 4 times longer than wide;

- ductus bursae narrow, twice as long as ovoid corpus bursae.

Distribution. O. fragilis known only from NW Thailand.

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.