Formation des reliefs externes de l'œuf de Micropteryx calthella L. (Lepidoptera: Micropterigidae)

Abstract

The external sculpturing of the egg of Micropteryx calthella L. appears after the egg has been laid. Immediately after oviposition, the external surface of the egg is smooth, being covered with a viscous material. During the hour following oviposition, this material is locally raised up, forming club-like structures that remain perpendicular to the egg surface. These club-like structures result from exudation of a substance produced by the oocyte. The external layers of the egg and their ornamentations do not constitute a true chorion because they are not secreted by the follicle cells.

Egg-Shells in mites: Cytological aspects of vitelline envelope and chorion formation inPergamasus barbarusberlese (Gamasida, Pergamasidae)

“…J. Acarol. 195 Mazzini, 1978;Chauvin and Chauvin, 1980;Biemont, et al, 1981). The endochorion is formed by a transformation of the vitelline envelope material which changes its chemical composition and physical properties rather than structure.…”

19. Embryology

“…Under these masses lies a hard, porous layer (not chorion) of variable thickness (5-15 μιη). This layer is also reported to be originated from the accessory gland (Chauvin & Chauvin 1980). These masses and layer probably act as retaining water and prevent the egg being desiccated.…”

4. The Non-Glossatan Moths

“…2. Studies devoted to this family deal with the adult head (Le Cerf 1926, Tillyard 1923a, Hannemann 1956, Chauvin & Faucheux 1981, Faucheux 1992, wings (Tillyard 1919, Philpott 1923, pregenital abdomen (Kristensen 1984 c), genitalia (Philpott 1934, 1924, Hannemann 1957, Kristensen 1984 a), brain (Buxton 1917), tracheal system (Kristensen 1984 b), spermatogenesis (Friedländer 1983, Sonnenschein & Häuser 1990, Hamon & Chauvin 1992, ovary, egg structure and embryogenesis (Chauvin & Chauvin 1980, Ando & Kobayashi 1978, Kobayashi 1994, Kobayashi & Ando 1981. The extraordinary larval structure has so far been treated only in a preliminary way (Tillyard 1923b, Mutuura 1956, Hinton 1958, Lorenz 1961, Yasuda 1962, Davis 1987, Kozlov 1991, Kristensen 1990).…”