Stonis, Jonas R. & Remeikis, Andrius, 2016, Southern Andean Stigmella sinuosa complex (Lepidoptera, Nepticulidae): unraveling problematic taxonomy with a pictorial key of adults?, Zootaxa 4136 (2), pp. 309-322: 316-317

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Documentation of Stigmella  species 642

( Figs 19–22View FIGURES 19 – 21View FIGURE 22)

Material examined. 1 Ƌ, ARGENTINA, Neuquen, San Martin de los Andes, elevation ca. 640 m, 17.x. 1981, Nielsen & Karsholt, genitalia slide no. RA 642 ( ZMUC).

Diagnosis. From the most resembling S. sinuosa  and particularly S. mevia  it differs in the combination of characters illustrated in fig. 22.

Male ( Fig. 19View FIGURES 19 – 21). Forewing length 3.2 mm; wingspan 7.1 mm. Head: palpi brownish cream; frontal tuft unknown, rubbed, only few pale brown piliform scales left; collar brown; scape brownish cream speckled with pale brown lamellar scales; antenna distinctly longer than half the length of forewing; flagellum with 43 segments, greybrown on upper side and underside. Thorax, tegula and forewing densely speckled with grey-brown to dark greybrown scales with weak purple iridescence. Forewing with some silvery shiny (at certain angle also with little golden gloss) scales apically; fringe grey-brown, distally pale grey-brown; underside of forewing grey-brown, without spots. Hindwing and its cilia grey-brown with some purple iridescence on upper side and underside; without androconia. Legs ochre-brown, with some grey-brown scales on upper side. Abdomen fuscous on upper side and underside; anal tufts short, brownish grey; genital plates brown.

Female. Unknown.

Male genitalia ( Figs 20–22View FIGURES 19 – 21View FIGURE 22). Capsule longer (330 mm) than wide (200 mm). Phallus ( Fig. 21View FIGURES 19 – 21) 260 mm long, 116 mm wide; vesica with 7 horn-like cornuti ( Figs 21View FIGURES 19 – 21, 22View FIGURE 22).

Bionomics. Host-plant: unknown. Adults fly in October.

Distribution. Known from the western (mountainous) Argentina at elavation about 640 m.


Zoological Museum, University of Copenhagen