4. Acalyptris barbudo Stonis & Remeikis, sp. nov. (Figs 30–37)

Diagnosis. Externally, the new species is distinguishable from all other Acalyptris by the large grey-brown basal spot of the forewing (Fig. 31) and tufts of rising, piliform androconia (see Fig. 32) of the abdomen. In the male genitalia, the combination of short lateral lobes of vinculum, rounded pseuduncus, and phallus with unique carinae and lateral spines (Figs 36, 37) distinguishes A. barbudo from all known Acalyptris species.

Description. Male (Figs 30–34). Forewing length 2.2 mm; wingspan 5.1 mm (n = 1).

Head. Labial palpus cream; scape cream; frontal tuft white; collar comprised of white piliform scales; antenna longer than one-half length of forewing; flagellum glossy, ochre cream or grey (depending on angle of view), with about 34 segments.

Thorax. Tegula cream to whitish cream; thorax whitish cream only proximally, anteriorly grey-brown, colorous with basal spot of forewing; Forewing whitish cream with silvery gloss, sparsely speckled with grey-brown scales and with a large grey-brown spot basally (Fig. 30); fringe cream, without fringe line; forewing underside dark brown, except small, cream spot basally; no androconia. Hindwing and fringe white or grey (depending on angle of view), on underside, cream. Legs glossy, golden cream, with some black-brown scales on upper side.

Abdomen. With six tufts of cream, piliform androconia on upper side; scaling black-brown on upper side, distally grey cream, brownish cream on underside. Genitalia (Figs 35–37) with capsule about 325 µm long, 205 µm wide. Phallus about 255 µm long, with unique ventral carinae and spines laterally (Fig. 37).

Female. Unknown.

Bionomics. Host plant is unknown. Adults fly in May (one specimen was attracted to light). Otherwise, biology is unknown.

Distribution (Fig. 1). Currently known from a single locality in Peru, Departamento de Junín: Selva Central, Satipo, at altitude about 750 m (Figs 2–5).

Etymology. The species name derived from the Spanish barbudo (bearded), in reference to the unique, rising androconia of the abdomen.

Type material. Holotype: ♂, PERÚ, Junín Region, Satipo, 11°15ꞌ30ꞌꞌS, 74°37ꞌ56ꞌꞌW, 750 m, at light, 13– 15.v.2018, leg. J. R. Stonis & S. R. Hill, genitalia slide RA1005 (ZMUC).