Stigmella arequipica Remeikis & Stonis,

Stonis, Jonas R., Diškus, Arūnas, Remeikis, Andrius, Karsholt, Ole & Torres, Nixon Cumbicus, 2017, Illustrated review of the leaf-mining Nepticulidae of the central Andes (Peru and Bolivia), Zootaxa 4257 (1), pp. 1-70: 36

publication ID 10.5281/zenodo.556874

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Stigmella arequipica Remeikis & Stonis

sp. nov.

27. Stigmella arequipica Remeikis & Stonis  , sp. nov.

( Figs 2View FIGURES 1 – 8, 9View FIGURES 9 – 11, 33View FIGURE 33, 37View FIGURE 37, 77–81View FIGURES 77 – 81)

Type material. Holotype: ♂, PERU, Dept. Arequipa, 8 km E Arequipa, Rio Andamayo Valley , elevation about 2920 m, 7.iv.1987, O. Karsholt, genitalia slide no. RA 551♂ ( ZMUC)  .

Diagnosis. Belongs to the S. marmorea  group. The combination of two very short apical processes of valva, widely bilobed uncus, large lateral lobes of vinculum, transtilla without sublateral processes, specific set of slightly curved spine-like cornuti, and distinctly speckled forewing with cream white fascia distinguishes S. arequipica  sp. nov. from all other Andean Stigmella  species.

Male ( Fig. 33View FIGURE 33). Forewing length about 2.2 mm; wingspan 4.8 mm. Head: palpi grey; frontal tuft brown-grey (severely rubbed in holotype); scape grey; collor of scape unknown (rubbed in holotype); antenna slightly longer than half the length of forewing; flagellum with 30 segments, slightly glossy, grey on upper side, greyish cream on underside. Thorax and tegula dark grey, distally almost white, sparsely speckled with fuscous scales. Forewing: grey cream background distintively (contrasting) speckled with grey-black scales; fascia postmedian, wide, cream white, slightly glossy but not metallic shiny; fringe pale grey to grey; underside of forewing grey-brown, without spots or androconia. Hindwing grey on upper side and underside, without spots or androconia; its fringe pale grey to grey. Legs glossy, pale grey to grey. Abdomen dark grey with some cream scales on upper side, grey cream on underside; genital plates greyish cream; anal tufts short, grey cream.

Female. Unknown.

Male genitalia ( Figs 77–81View FIGURES 77 – 81). Capsule longer (275 µm) than wide (155 µm). Vinculum with large lateral lobes. Uncus with two wide and papillated lobes. Gnathos with two slender caudal processes. Valva 140–145 µm long, 50–55 µm wide, with two very short apical processes and bulged inner lobe; transtilla without sublateral processes. Juxta membranous, indistinctive. Phallus ( Figs 79, 80View FIGURES 77 – 81) 190 µm long, 70 µm wide; vesica with six large spine-like cornuti, four of them slightly curved.

Bionomics. Adults fly in April. Otherwise biology unknown.

Distribution ( Fig. 9View FIGURES 9 – 11). This species occurs in the Peruvian Andes ( Peru: Arequipa Departamento) at altitudes about 2920 m.

Etymology. The species is named after the region where it was collected (Arequipa Departamento in Peru).


Zoological Museum, University of Copenhagen