Ova of Antheraea compta. A. Fertilized ovum; a: dry condition; b: wet condition; B–D. Unfertilized ovum (the flat zones are critically sunken); B. Micropylar side of the circumferential zone; C. Non-micropylar side of the circumferential zone; D. Flat zone; E. Flat zone; a: dry aeropyle; b: wet aeropyle; F. Micropylar zone; G. Micropylar zone, the center; H. Circumferential zone, spongiform fragments and their walls; I. Circumferential zone, spongiform fragments and their walls; a: incomplete aeropyle crowns; b: spongiform structure; J. Chorionic cross section; a: exochorion; b: exo-fillers; c: endo-fillers; d: endochorion; K. Chorionic exo-fillers; L. Chorionic endo-fillers 2 µm. Scale bars: 2 mm (A); 500 µm (B, C); 1 mm (D); 40 µm (E, I); 5 µm (G); 2 µm (K, L); 100 µm (F, H); 10 µm (J).