Dahlica lichenella (Linnaeus, 1761)

Lovtsova, Julia A., Kochiev, Mikhail V. & Kolesnichenko, Kirill A., 2022, External egg morphology of two parthenogenetic species of the genus Dahlica Enderlein (Lepidoptera: Psychidae), Zootaxa 5133 (3), pp. 443-450 : 445

Dahlica lichenella (Linnaeus, 1761)

Eggs whitish, oval, vary in size, their diameters in the widest part from 318 μm to 366 μm ( Plate 2 , Figs. a–c; Plate 5 , Fig. a), and lengths from 482 μm to 566 μm ( Plate 5 , Fig. b; Table 2 ). Micropyle area formed by 11–16 primary cells mostly unclosed. Some primary cells closed, and in this case, secondary cells present, so micropyle rosette can be highly asymmetrical. Primary cells mostly rectangular, triangular, or of irregular shape, length from 10 to 17.9 μm and width from 7 to 13.4 μm. Diameters of the micropyle rosettes from 47.5 to 61.2 μm ( Plate 4 , Figs. a–f). Micropyles rounded and have diameters from 22.1 to 25.1 μm. Chorion relatively smooth with slight tubercles; ridges, carinae, and cells are absent. Clearly distinguishable micropyle pores of widths from 1.3 to 3.4 μm in number from 13 to 16 present at the edges of micropyle. Distinct aeropyles absent.

Figures

PLATE 2, FIGURES a–f. Eggs. Dahlica lichenella: a, diameter in the wide part (1, trace); b, micropyle area (3, arrowed); c, chorion; D. triquetrella: d, length (2, trace); e, view from the top; f, chorion.

PLATE 4, FIGURES a–f. Micropyle of D. lichenella: a, Ramenskoje District, Bykovo; b, Ramenskoje District, Bykovo; c, Ramenskoje District, Bykovo; d, Narofominskij District, Selatino; e, Narofominskij District, Selatino; f, Ramenskoje District, Bykovo.

PLATE 5, FIGURES a–d. Features of D. lichenella and D. triquetrella: a, diameter in the widest part; b, length; c, diameter of the micropyle; d, number of micropyle pores.