5. Stigmella hamata Puplesis & Robinson, 2000

(Figs 2, 9, 29–32)

Stigmella hamata Puplesis & Robinson, 2000: 30 .

Material examined. 1 ♂ (holotype), PERU: Dept. Cuzco, 40 km NW Sicuani, 5 km E of Laguna Pomacanchi, 13°58'52"S, 71°29'20"W, 3240 m, 24.iii.1987, O. Karsholt, genitalia slide no. Diškus 199 (ZMUC) ; 1 ♂ (paratype), PERU, Dept. Puno, 15 km E of Ayaviri, Laguna Asnacocha, 14°49'44"S, 70°22'34"W, ca. 3940 m, 26–27.iii.1987, O Karsholt, genitalia slide no. Diškus 198 (ZMUC) ; 1 ♂ (not type-series), PERU, Dept. Puno, 5 km E Limbani, 14°07'23"S, 69°40'23"W, elevation ca. 3000 m, 28.iii.1987, O. Karsholt, genitalia slide no. RA 558♂ (ZMUC) ; 2 ♂ (not type-series), BOLIVIA, Dept. Cochabamba, 35 km SE Punata, 8 km SW Vacas, Rodeo, 17°36'10"S, 65°37'26"W, elevation ca. 3500 m, 15–16.iv.1987, P. Arctander, genitalia slide nos RA 557♂, AD 673♂ (ZMUC) .

Diagnosis. The combination of very glossy forewing and two cornuti in the male genitalia make S. hamata similar to the Stigmella schoorli group. However, the combination of two distinctive wide hook-shaped apical processes of valva, very short transtilla without sublateral processes, uncus with four caudal papillae, and rather asymmetrical horn-like cornuti (rate: 1:8; the longer cornutus twice exceeds the width of phallus) distinguishes S. hamata from all other known Stigmella species, including the species belonging to the S. schoorli group.

Male (Fig. 32). Described in Puplesis & Robinson 2000: 30. Wingspan: 6.8–7.0 mm.

Female. Unknown.

Male genitalia. Illustrated in Puplesis & Robinson 2000: figs 108–112.

Bionomics. Adults fly in March–April. Otherwise biology unknown.

Distribution (Figs 9, 29–31). This species occurs in the Peruvian and Bolivian Andes (Fig. 30) at altitudes between 3000–4000 m (new distribution data are provided in fig. 30).