Dahlica triquetrella (Hübner, 1813)

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 : 444

Dahlica triquetrella (Hübner, 1813)

Eggs whitish, oval (prolate spheroid), vary in size, their diameters in the widest part (equatorial diameter) from 307 μm to 368 μm ( Plate 2 , Figs. d–f; Plate 5 , Fig. a), and lengths (symmetry axis) from 471 μm to 577 μm ( Plate 5 , Fig. b; Table 1 ). Micropyle area formed by 11–15 primary cells mostly unclosed. Some of 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 μm to 16.6 μm and width from 3.8 μm to 7.6 μm ( Plate 3 , Figs. a–f). Diameters of the micropyle rosettes from 30.6 μm to 47.3 μm. Micropyles rounded and have diameters from 10 to 13.4 μm. Chorion relatively smooth with slight tubercles; ridges, carinae, and cells absent. Clearly distinguishable micropyle pores of widths from 1.3 to 2.8 μm in number from 9 to 12 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 3, FIGURES a–f. Micropyle of D. triquetrella: a, Narofominskij District, Selatino; b, Ramenskoje District, Bykovo; c, Narofominskij District, Selatino; d, Ramenskoje District, Bykovo; e, Narofominskij District, Selatino; f, Narofominskij District, Selatino.

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.