Astrotischeria onae Diškus & Stonis, 2018

Astrotischeria onae Diškus & Stonis View in CoL , sp. nov.

( Figs. 18, 19 View FIGURES 16–19 , 160–175 View FIGURES 160–163 View FIGURES 164–168 View FIGURES 169–175 , 233 View FIGURE 233 )

Type material. Holotype: ♂, GUATEMALA : Antigua Guatemala, San Juan del Obispo , 14°31'07"N, 90°43'50"W, elevation 1680 m, 25.ii.2012, field card no. 5114, A. Diškus, genitalia slide no. AD 909♂ ( ZMUC) GoogleMaps .

Diagnosis. The combination of a wide valva with unique-shaped dorsal lobes (see Figs. 18, 19 View FIGURES 16–19 ), strongly developed anellus with lateral horn-like processes, long, bilobed uncus in the male genitalia, and a dark-speckled forewing distinguishes A.onae sp. nov. from all other Astrotischeria , including other members of the A. trilobata group.

Male ( Figs. 160–163 View FIGURES 160–163 ). Forewing length about 3.7 mm; wingspan about 8.1 mm. Head: face greyish cream; palpi yellowish creame; frontal tuft comprised of yellowish-tipped, brownish grey lamellar scales; antenna with about 37 segments, distinctly longer than half the length of forewing; flagellum grey on both upper and underside; sensillae long but rather indistinct. Thorax and tegula covered with brownish grey, predominantly cream-tipped scales. Forewing densely irrorated with brownish grey scales with some ochre gloss; in apical third, forewing also speckled with black scales; fringe pale brownish grey; fringe-line distinct, formed of black scales; forewing underside grey-brown, except small, irregular scaleless patch on the base, without androconia. Hindwing brownish grey on both upper and underside, without androconia; fringe brownish grey. Legs glossy, brownish cream, on upper side densely covered with blackish brown scales with little purple iridescence. Abdomen grey-brown to blackish grey on both upper and underside; anal tufts long, dark grey; genital segments cream.

Female. Unknown.

Male genitalia ( Figs. 18, 19 View FIGURES 16–19 , 164–175 View FIGURES 164–168 View FIGURES 169–175 ). Capsule about 590 µm long, 260 µm wide. Uncus ( Fig. 165 View FIGURES 164–168 ) consisting of two long, slender lateral lobes. Valva divided ( Figs. 18, 19 View FIGURES 16–19 , 169–175 View FIGURES 169–175 ): ventral lobe ( Figs164 View FIGURES 164–168 , 171 View FIGURES 169–175 ) very wide, about 365 µm long (excluding basal process); dorsal lobes consisting of two elements: wide, distally curved lobe ( Figs. 18, 19 View FIGURES 16–19 , 169, 173 View FIGURES 169–175 ), and slender, horn-like process; transtilla absent; basal process of valva rather long, curved ( Figs. 165 View FIGURES 164–168 , 170 View FIGURES 169–175 ). Anellus strongly chitinized laterally, with a distinct spine-like process on each side ( Figs. 175 View FIGURES 169–175 ), and a few setae ( Fig. 174 View FIGURES 169–175 ). Phallus ( Figs. 166–168 View FIGURES 164–168 ) about 400–405 µm long, distally widened and bifurcated, without spines ( Fig. 168 View FIGURES 164–168 ).

Bionomics. Host plant unknown (unidentified). Mining larva recorded in February. Leaf-mine blotch-like.

Distribution ( Fig. 233 View FIGURE 233 ). Known from a single locality in the highlands of Guatemala, at an elevation of about 1680 m.

Etymology. The species is named in memory of Ona Diškevičienė ( 1951–2017), late mother of the author (and devoted collector) Arūnas Diškus.