Ptilodon

Dolinskaya, Irina V., 2019, The use of egg characters for the classification of Notodontidae (Lepidoptera), with keys to the common Palaearctic genera and species, Zootaxa 4604 (2), pp. 201-241 : 233

Ptilodon

1 Cellular sculpture in micropylar area clearly expressed yet poorly defined on remaining egg surface. Micropylar area represented by rosette and 5–8 rows cells ( Figs. 109, 110 ).......................................................... 2

- Cellular sculpture on entire egg surface clearly expressed. Micropylar area represented by rosette and 2–3 rows cells ( Figs. 111, 112 ). Eggs laid in tight single-layer clusters where they are pressed one to another............................ P. hoegei

2 Egg matte-white. Chorion translucent. Cells of most of the egg surface with very narrow, filiform ridges— 0.2 µm and aero-pyles— 1.7–1.9 µm ( Fig. 113 )................................................................... P. capucina (from Europe to Japan, Korea, China)

- Egg light-yellow, then becoming brownish tinge. Chorion transparent. Cells of most of the egg surface with flat, wide walls— 2.5–3.4 µm and aeropyles— 2.9–3.2 µm ( Fig. 114 )................................................. ... P. cucullina (from Europe to Volga-Don region in Russia)

Figures

FIGURES 105–110. Eggs of Notodontidae. 105. Nerice davidi, micropylar rosette. 106. Nerice davidi, part of lateral area. 107. Nerice leechi, micropylar area. 108. Nerice leechi, part of lateral area. 109. Ptilodon capucina, micropylar area. 110. Ptilodon cucullina, micropylar area. Scale bars 105–110 (10 µ).

FIGURES 111–114. Eggs of Notodontidae. 111. Ptilodon hoegei micropylar area. 112. Ptilodon hoegei, part of lateral area. 113. Ptilodon capucina, part of lateral area. 114. Ptilodon cucullina, part of lateral area. Scale bars 111–114 (10 µ).