Ciampa arietaria Guenée, 1858

Young, Catherine J., 2006, Descriptions of the eggs of some southern Australian Geometridae (Lepidoptera), Zootaxa 1287, pp. 1-294 : 1-294

Ciampa arietaria Guenée (Figs 176–183)

(type species)

Oviposition

4♀ Code nos.: G261, G274, G281, G427.

Period of oviposition: 23 Apr.–28 May.

Batch size: 31.6 ± 8.7 (n = 5)

Mean realised fecundity: 39.5 ± 13.7

Incubation time (days): 24–32 (on moistening)

Batch configuration and attachment: Attached, singly, small groups or clusters.

Colour: Glistening pearly white to pale green, becoming dark brown (Fig. 176).

Size (mm): (n=13) L =0.73 ± 0.02, W=0.52 ± 0.01, T=0.43 ± 0.01

Width/length: 0.72

No. of females: 3

Aeropylar opening size (m) (n=6): L=1.3 ± 0.21, W=1.0 ± 0.10

Relative aeropylar opening size: 1.8

Micropyles: Indistinct (Figs 177 & 178)

No. of openings: 5

No. of cells in rosette: 9

No. of rows of cells in micropylar area: 4

Shape: Narrow, elongate, sub­cuboidal, anterior pole truncated, slightly wider than posterior, polar profile sub­rectangular, dorso­ventrally flattened (Figs 176, 177, 179 & 180).

Characteristics: Egg unmarked apart from hexagonal cells with flat floors, aeropyles only visible on and around anterior pole. Cell walls narrow, slightly elevated in micropylar area (Figs 177, 179 & 180). Cells surrounding micropylar area outlined only by aeropyles (Fig. 177), aeropyles slightly elevated, aeropyle openings of irregular shape, small (Figs 177, 181 & 182). Chorion shallowly, sparsely ridged on middle of top of egg (Figs 181 & 182), granulated or blistered on anterior pole (Fig. 183).