Bruma parvus Fibiger, 2010

FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, Zootaxa 2583 (1), pp. 1-119 : 52-53

Bruma parvus Fibiger , new species

( Plate 6 , figure 7; male genit. plate 16, figure 3)

Material examined. Holotype: male, Indonesia, N Sumatra, HW. II, 28 km S P.Siantar, near Tigadoluk , 1050 m, 2’45’52 N, 99’58’20 E, 10.ii.2002, leg. M. Fibiger, coll. MF, later to be deposited in ZMUC.

Paratypes: 2 males, with same data as holotype, but one with genit. prep. 4531 M. Fibiger, other with 1000 m, 2’46’13 N, 98’58’57 E, 23.xi.1984, leg E. Diehl, genit. prep. 4119 M. Fibiger. Colls MF and ZSM .

Diagnosis. Imago (external). Wingspan: 9–10 mm.

Labial palps: porrect; second segment dark brown outside, beige inside, roughly scaled downwards and outwards; third segment 1/4 of second, narrow, cylindrical, brown at inner half, otherwise beige (apo.).

Head, patagia, anterior part of tegulae, prothorax, basal part of costa, costal part of medial area, and terminal area, including fringes: black; costal medial area quadrangular.

Forewing ground colour: brown, suffused with few black scales.

Abdomen: dark grey; dorsal beige tuft present on basal segment.

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

Reniform stigma: indistinct, ovoid, beige, outlined by ground colour.

Hindwing: light grey, with indistinct discal spot.

Underside: forewing grey brown, hindwing grey, discal spot of hindwing present.

Male genitalia. Tegumen-fultura superior: fused; with diaphragm medially forming a tube; ventral part together with vinculum and saccus ring-formed and heavily sclerotised (apo.).

Valvae: asymmetrical.

Sacculus: right side twice as long as left; right side with long, setose editum (apo.).

Ampulla: almost circular, short, broad, apically rounded, (apo.).

Digitus: absent.

Juxta-anellus plate: basally and subbasally strongly asymmetrical, with narrow flap forming a hole for phallus; medially with extremely long, heavily sclerotised, apically free, curved medially 90 o; after curve, heavily setose (apo.).

Phallus: coecum short, smoothly rounded; broadest at ductus ejaculatorius; first coiled laterally, then 90 o upturned and tapered to tip (apo.).

Vesica: subapically armed with one tiny triangular cornutus (apo.).

Differential diagnosis. B. parvus differs from other Tactusinae species in:

- colouration of labial palps;

- dark brown ground colour;

male genitalia, in

- ampulla almost circular;

- anellus, free, long, curved 90 o, setose;

- phallus with 90 o curve and coiled upward; and

- vesica with tiny cornutus.

Distribution. B. parvus known only from Indonesia, North Sumatra.

Figures

PLATE 6. Figures 1–8. Fustis, Bruma, Costasensora, and Longiantrum species, adults. 1, F. sensora, male, Thailand N, Chiang Mai; 2, F. biextuta, male holotype, Thailand, Tham Sakoe Nat P.; 3, F. extuta, male holotype, Thailand, Mae Hong Son; 4, F. gregerseni, male holotype, Thailand W, Uthai Thani; 5, F. s-forma, male holotype, Thailand NE, Ban Nam Lee Pattana; 6, F. papei, female holotype, Thailand, Nakhon Nayok; 7, Bruma parvus, male holotype, Indonesia, North Sumatra; 8, Costasensora honeyi, male holotype, Malaysia, Sarawak.