Gossypariella siamensis (Takahashi, 1942)

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

Gossypariella siamensis (Takahashi, 1942) Figs 1f-g , 2 , 5a

Material.

K 1521, Thailand, Chiang Mai, city street near the University, on branches and twigs of an undetermined dicotyledonous tree, probably Ficus sp., 9.XI.2019, I.A. Gavrilov-Zimin.

New data.

2n = 16; bisexual reproduction with a Lecanoid heterochromatinization in male embryos. Complete ovoviviparity. Female reproductive system is similar with that in the previous species, but accessory glands are located in the middle part of the common oviduct (Fig. 2 ).

Comments.

The genus Gossypariella Borchsenius, 1960 includes 4 species distributed in the Oriental region. G. siamensis is the first species of the genus studied cytogenetically.

Figures

Figure 1. Embryonic cells and chromosomes of the studied species (Margarodidae, Pseudococcidae, Eriococcidae). a Steatococcus samaraius (2 n = 4) b Antonina parazonata (2 n = 30) c A. vietnamensis (2 n = 20) d Mollicoccus guadalcanalanus (2 n = 10) e Acanthococcus prope onukii (2 n = 16) f, g Gossypariella siamensis (2 n = 16). g Shows interphase cells of male embryos with a Lecanoid heterochromatinization of the paternal set of chromosomes (arrowed in each cell). Scale bars: 10 µm.

Figure 2. General anatomy of the female (or female-like hermaphrodite in Steatococcus samaraius) reproductive system in the studied species (Margarodidae, Pseudococcidae, Eriococcidae).

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.