8. Stigmella robusta Remeikis & Stonis, 2016

(Figs 1, 35, 37)

Stigmella robusta Remeikis & Stonis; in Stonis et al. 2016d: 41, figs 18, 27, 103–107.

Material examined. 4 ♂ (holotype and paratypes), 3 ♀ (paratypes), PERU, Dept. Ancash, 35 km SE Huaraz, Cerro Cahuish, Quabrada Pucavado, 9°40'50"S, 77°13'32"W, elevation about 4100 m, 15–18.ii.1987, O. Karsholt, genitalia slide nos RA 566♂ (holotype), RA 575♂, RA 576♂, RA 580♀ (paratypes) (ZMUC) .

Diagnosis. Belongs to the S. expressa group. The combination of gnathos with closely juxtaposed processes, angular inner lobe of valva, large, distally four-lobed uncus, set of 2–3 large cornuti and cluster of small spine-like cornuti, and pale, speckled forewing distinguishes S. robusta sp. nov. from all other Stigmella species, including the members of S. expressa group.

Male (Fig. 35). Described in Stonis et al. 2016d: 41, fig. 103. Forewing length 3.5–4.5 mm; wingspan 7.6–9.6 mm.

Female. Similar to male.

Male genitalia. Illustrated in Stonis et al. 2016d: figs 104–106.

Female genitalia. Illustrated in Stonis et al. 2016d: fig. 107.

Bionomics Adults fly in February. Otherwise biology unknown.

Distribution (Fig. 1). This species occurs high in the Peruvian Andes (Peru: Ancash Departamento) at altitudes about 4100 m.