Fustis, Fibiger, 2010

FIBIGER, MICHAEL, 2010, Revision of the Micronoctuidae (Lepidoptera: Noctuoidea) Part 3, Taxonomy of the Tactusinae, Zootaxa 2583 (1), pp. 1-119 : 50

Fustis s-forma Fibiger, new species

( Plate 6 , figure 5; male genit. plate 16, figure 1)

Material examined. Holotype: male, Thailand NE, ca. 5 km NE junction road 1081–1307 towards Ban Nam Lee Pattana , 28.xi.2003, leg. L. Peregovits, M. Földvári & Á. Körösi, genit. prep. 6070 M. Fibiger, coll. HNHM.

Diagnosis. Imago (external). Wingspan: 13.5 mm (apo.).

Head, patagia, anterior part of tegulae, prothorax, basal part of costa, triangular patch of medial area, and terminal area, including fringes: black.

Forewing: long and narrow, with pointed apex; brown ground colour (apo.).

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

Crosslines: untraceable, except subterminal line weakly marked, beige, and terminal line marked by black interneural dots.

Reniform stigma: beige, ovoid, black outlined.

Hindwing: grey; with narrow brown terminal line and indistinct discal spot; fringes basally beige, distally grey.

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

Male genitalia. Tegumen-fultura superior: fused, with diaphragm medially forming a tube (apo.).

Vinculum: two-branched; centre one barlike; posterior one branchlike, not curved.

Saccus: relatively long; broadly U-shaped.

Valvae: slightly asymmetrical.

Ampulla: bilobed; slightly asymmetrical; lobes tapered strongly from subapically twice as broad and rounded ventral part to slightly shorter dorsal, rounded tip; dorsal lobe narrow, straight; ventral lobe broad, curved (apo.)

Digitus: rather large, platelike, broadly quadrangular.

Juxta-anellus plate: inseparable (phallus on left side); base strongly asymmetrical, with narrow processes; medially with extremely long, heavily sclerotised, free, tapered, and S-curved process; with curved, setose, pointed tip (apo.).

Phallus: coecum short and broad, smoothly rounded; broadest by ductus ejaculatorius; there with short forewardly directed process (a stop-function connected with juxta-anellus ventral processes); slightly upturned and tapered outwards; tip ventrally with small hook (apo.).

Vesica: armed with a small and short, heavily sclerotised rectangular plate (apo.).

Differential diagnosis. F. s-forma differs from other Fustis species in:

- brown ground colour;

- fused tegumen-fultura superior plate;

male genitalia, in

- shape of ampulla, especially narrow dorsal arm;

- long, S-formed, setose, pointed anellus;

- phallus short, slightly upturned, with ventral small hook at tip; and

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.