Fustis parasensora Fibiger

FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, Zootaxa 2583 (1), pp. 1-119 : 46

Fustis parasensora Fibiger , new species

( Plate 5 , figure 8; male genit. plate 15, figure 2)

Material examined. Holotype: male, Laos S, Sayaboury Prov. , Sayaboury, 30.ix.1986, leg. Native collector, genit. prep. 3318 M. Fibiger, coll. BPBM.

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

Head, patagia, thorax, and ground colour of forewing, including fringes, brown; basal part of costa, and costal part of medial area: blackish brown (apo.).

Abdomen: dark grey; with dorsal tuft on basal segment.

Crosslines: indistinct or untraceable.

Terminal line: marked by black interneural dots.

Reniform stigma: indistinct; beige, outlined black.

Hindwing: grey.

Underside: forewing brown grey; hindwing grey.

Male genitalia. Tegumen: long; dorsally fused with fultura superior, forming a cone around anal tube (apo.).

Vinculum: two branched; centre one barlike; posterior one branchlike, quadri-circular (apo.).

Saccus: short; broadly U shaped.

Valvae: asymmetrical; almost equally broad outwards to base of clasper.

Clasper: barlike; oblique to valva margins.

Ampulla: equally broad throughout, with rounded tips, except apical emargination; dorsal lobe twice as long as ventral (apo.)

Digitus: small, triangular.

Juxta: trapezoid, with medial cleft on dorsal and ventral side.

Anellus plate: bilobed; prominently asymmetrical; left lobe, clublike; heavily setosed; right lobe spatulate, with brushy setae on part of right and left sides (apo.).

Phallus: coecum tapered to rounded tip; broadest by ductus ejaculatorius; smoothly and strongly curved upwards to tip.

Vesica: unarmed.

Female genitalia. Unknown.

Differential diagnosis. F. parasensora differs from other Fust species in:

- smallsize;

- brown ground colour, with rather indistinct wing pattern;

male genitalia, in

- shape of ampulla, equally broad throughout, with rounded tips;

- anellus bilobed, left lobe clublike, heavily setose.

Distribution. F. parasensora known only from South Laos.

Figures

PLATE 5. Figures 1–8. Dignus, Vas, Nilgerides, and Fustis species, adults. 1, Tumula flavicollis, female holotype, Thailand N, Fang; 2, D. buchsbaumi, female holotype, Indonesia, Lombok; 3, Vas owadai, female holotype, Thailand N, Chiang Mai; 4, V. proceus, female holotype, Vietnam N, Da Lat; 5, Nilgirdes trifasciata, female holotype, Indonesia, Sumatra; 6, Fustis sterlingi, male holotype, China, Hong Hong, and female paratype, with same data; 7, F. malaysiensis, male holotype, Malaysia W, Trengganu; 8, F. parasensora, male holotype, Laos S, Sayaboury.