Disca thailandi, Fibiger, 2007

Fibiger, Michael, 2007, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea). Part 1, Taxonomy of the Pollexinae, Zootaxa 1567 (1), pp. 1-116 : 39-40

Disca thailandi Fibiger, new species

( Plate 4 , figs 7, 8; male genit. plate 15, figure 3, female genit. plate 23, figure 4)

Material examined.

Holotype: Thailand mid-west, by Kanchannaburi , River Kwai Resotel, 19–22.vii.2003, leg. M. Fibiger. Coll. MF, to be deposited in ZMUC.

Paratypes: 14 males, 4 females: 9 males, 1 female, with data as holotype, male genit. preps 4994, 4995, 5688 M. Fibiger, female genit. prep. 4998 M. Fibiger. Coll. MF . 1 male, 2 females, Thailand, Prov. Chiang Mai, Doi Inthanon south ridge, 1650 m, 18–21.x.1983, leg. M. Owada, genit. preps. 3284 (male), 3285 (female) M. Fibiger. Coll. NSMT . 1 female, Thailand C, Phitsanulok, Tong Salaeng Luang , 550 m, 24–25.viii.1987, leg. M. Owada. Coll. NSHT . 1 male, Thailand, Chiang Mai, Doi Suthep-Pui NP, 21.xi.1989, leg. I. J. Kitching and A. M. Cotton, BM 1992–19 . Coll. BMNH . 3 males, Thailand, Phuket, Kala View Point , 220 m, 7-11.2006, leg. D. Nilsson. Coll. DN .

Diagnosis.

Wingspan: 11–13 mm.

Forewing: relatively broad.

Transverse lines: all lines brown and well marked throughout; basal, antemedial, postmedial, and subterminal lines well marked by a black spot by costa; terminal line marked by black elongated dots.

Reniform: elongated, black.

Hindwing: greyish brown.

Underside: unicolorous greyish brown.

Abdomen: brown, male without long tufts.

Male genitalia.

Saccus: short, rounded.

Vinculum: short.

Tegumen: long.

Tergite and sternite: indistinct.

Costa: almost straight.

Sacculus: narrow, short.

Ampulla: slightly asymmetrical, elongate, apically smoothly rounded.

Pollex : short and heavily fused with clasper, with long hair-like setae.

Digitus: asymmetrical; relatively short, bent, pointed apically; right digitus longer and stouter than left one. Juxta: higher than wide.

Anellus: dorsally fused with juxta.

Phallus: long and narrow, broadest by ductus ejaculatorius, slightly tapered, bent at 2/3; coecum relatively long and rounded apically.

Female genitalia.

Ovipositor: quadrangular.

Anterior apophyses: shorter than posterior apophyses.

8 th abdominal segment: very narrow, ventrally fused with 7 th segment. 7 th abdominal segment: heavily sclerotised; position of ostium in posterior middle of segment; without processes or pouches.

6 th segment: posterior part of segment heavily sclerotised and fused with 7 th segment; anterior part of 6 th segment less sclerotised – similar to rest of abdomen.

Antrum: relatively long, 3 X longer than wide, convex on dorsal side, straight on ventral side.

Ductus bursae: membranous, 1½ X as long as corpus bursae.

Appendix bursae: arises at posterior end of ductus bursae.

Corpus bursae: relatively large and globular.

Differential diagnosis.

The male genitalia of D. thailandi are similar to those of D. arborita and D. javai but differ in having a longer ampulla that D. javai , but a shorter one than D. arboreta . The digiti of D. thailandi are shorter than those of D. arborita but longer than those of D. javai . The angle of the posterior bend of the phallus is of D. thailandi 100° degrees, whereas that of D. arborita 100° and 95°, respectively. The differences from the other species in the group are described above under D. tegali .

Figures

PLATE 4. Figures 1–8. Tolpia and Disca species, adults. 1, T. knudlarseni, male holotype, Indonesia, Sumatra N, between Pematang Siantar and Tigadoluk; 2, D. javai, male holotype, Indonesia, Java W, Djakarta; 3, D. arborita, male holotype, Indonesia, Sumatra W, Lake Maninjau; 4, D. parajavai, female holotype, Indonesia, Sumatra N, Huta Padang; 5, D. tegali, female holotype, Indonesia, Java, Tegal; 6, D. paulum, female holotype, Thailand mid W, Kanchannaburi; 7, 8, D. thailandi, Thailand, male holotype, Thailand mid W, Kanchannaburi, and female paratype, Thailand S, Phuket.