Stigmella polylepiella Diškus & Stonis, 2016,

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: 28

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Stigmella polylepiella Diškus & Stonis, 2016


13. Stigmella polylepiella Diškus & Stonis, 2016 

( Figs 2View FIGURES 1 – 8, 9, 11View FIGURES 9 – 11, 13, 15View FIGURES 12 – 18, 32View FIGURE 32, 37View FIGURE 37, 121–124View FIGURES 116 – 125)

Stigmella polylepiella Diškus & Stonis, in Stonis et al. 2016e: 86  –90, figs 7–26.

Material examined. 2 ♂ (holotype and paratype), PERU, 60 km NW of Cuzco, Ollantaytambo , 13°15'31"S, 72°15'54"W, elevation about 2850 m, mining larvae on Polylepis racemosa Ruiz & Pav.  , 21.x.2008, field card no. 4948, A. Diškus, genitalia slide nos AD739 (holotype), AD741 (paratype) ( ZMUC).GoogleMaps 

Diagnosis. The combination of the densely speckled forewing with some golden gloss and purple iridescence, closely juxtaposed processes of gnathos, three-lobed uncus, and unique set of cornuti in the phallus distinguishes S. polylepiella  from all other Stigmella  species; the host-plant Polylepis racemosa  ( Rosaceae  ) also makes this species distinctive.

Male ( Fig. 32View FIGURE 32). Described in Stonis et al. 2016e: 86, figs 14–17. Forewing length about 2.6 mm; wingspan 5.7–5.8 mm.

Female. Unknown.

Male genitalia. Illustrated in Stonis et al. 2016e: figs 22–26.

Bionomics ( Figs 121–124View FIGURES 116 – 125). Larvae mine in leaves in October. Host-plant: Polylepis racemosa Ruiz & Pav.  ( Rosaceae  ). Egg beige cream, mat (lustreless), oval-shaped, flattened dorso-ventrally, attached (not glued) on the leaf under side. Leaf-mine starts as a narrow gallery filled with black frass; later it develops abruptly to a large blotch with frass irregularly scattered but most of it remains accumulated in basal part of the blotch ( Fig. 121View FIGURES 116 – 125). Larva spins its cocoon inside the mine; the mine swells and becomes blisterlike at this stage ( Fig. 124View FIGURES 116 – 125). Cocoon purplish brown to purplish dark brown; shape of the cocoon unusual, narrow; length 2.0– 2.4 mm, maximal width 0.8–0.83 mm ( Fig. 123View FIGURES 116 – 125). Exit slit on upper side of the leaf. Using our ‘Formula of Evaluation of Abundance and Occurrence of Leaf-miners’ (see Diškus, Stonis 2012: 52–54), Stigmella polylepiella  is extremely abundant in the type locality: a mass mining of the new species were observed (sometimes with a few leaf-mines on a single leaf); more than 300 leaf-mines with larvae were collected at a single site in Ollantaytambo, Peru ( Figs 13, 15View FIGURES 12 – 18).

Distribution ( Figs 9View FIGURES 9 – 11,). This species occurs in the Andes ( Peru: NW of Cuzco) at altitude about 2850 m ( Fig. 11View FIGURES 9 – 11).


Zoological Museum, University of Copenhagen














Stigmella polylepiella Diškus & Stonis, 2016

Stonis, Jonas R., Diškus, Arūnas, Remeikis, Andrius, Karsholt, Ole & Torres, Nixon Cumbicus 2017

Stigmella polylepiella Diškus & Stonis, in Stonis et al. 2016e : 86

Stonis 2016: 86