Discochiton expansum (Green, 1896)

Gavrilov-Zimin, Ilya A., 2020, Chromosomal and reproductive features of some Oriental and Australasian scale insects (Homoptera, Coccinea), Comparative Cytogenetics 14 (3), pp. 339-352 : 339

Discochiton expansum (Green, 1896) Figs 3b , 4

Material.

K 1121, Thailand, Malay Peninsula, Khao Lak, forest above the city, on leaves of an undetermined bush, 8.XI. 2013, I.A. Gavrilov-Zimin.

New data.

2n = 18; bisexual reproduction with a Lecanoid heterochromatinization in male embryos. Complete ovoviviparity. Female reproductive system has the usual structure, but accessory glands are poorly visible (Fig. 4 ).

Comments.

The recently erected genus Discochiton Hodgson & Williams, 2018 comprises 21 species, and D. expansum is the first species of the genus studied cytogenetically.

Figures

Figure 3. Embryonic cells and chromosomes of the studied species (Coccidae). a Coccus viridis (2 n = 18) b Discochiton expansum (2 n = 18) c Luzulaspis australis (2 n = 18) d Megalocryptes buteae (2 n = 18) e Megapulvinaria maxima (2 n = 20) f Saccharolecanium krugeri (2 n = 18). Scale bars: 10 µm.

Figure 4. General anatomy of the female reproductive system in the studied species (Coccidae).