Saccharolecanium krugeri (Zehntner, 1897)

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

Saccharolecanium krugeri (Zehntner, 1897) Figs 3f , 4 , 5d

Material.

K 1368, Thailand, vicinity of Chiang Rai, forest above the Mae Fah Luang University, under the leaf sheathes of? Saccharum sp., 8.VI.2017, 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 (Fig. 4 ).

Comments.

These are the first cytogenetic and reproductive data for the small Oriental genus Saccharolecanium Williams, 1980, which comprises two species only. S. krugeri is noted here for the first time for the territory of Thailand.

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).

Figure 5. Females of some species on twigs of host plants. a Gossypariella siamensis b Megapulvinaria maxima c Megalocryptes buteae (with a colony of Kerria sp. at the background) d Saccharolecanium krugeri.