Acanthococcus prope onukii (Kuwana, 1902)

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

Acanthococcus prope onukii (Kuwana, 1902) Figs 1e , 2

Material.

K 1513, Thailand, Chiang Mai, slope of Doi Suthep Mt. near the University, on leaves of bamboo, 8.XI.2019, I.A. Gavrilov-Zimin.

New data.

2n = 16; bisexual reproduction with a Lecanoid heterochromatinization in male embryos. Eggs are laid in dense wax ovisac at the stage of anatrepsis, i.e. incomplete ovoviviparity is characteristic of the species. Female reproductive system consists of a spermatheca attached at the junction of the oviducts and accessory glands attached at the base of a common oviduct (Fig. 2 ).

Comments.

Only two species of the large genus Acanthococcus Signoret, 1875 have been previously studied cytogenetically, i.e. European A. agropyri (Borchsenius, 1949) and A. insignis (Newstead, 1891), both with 2n = 16 ( Gavrilov 2004, 2007). [Nota bene! The studied specimens differ from a common Acanthococcus onukii (= Anophococcus onukii ) in the conical setae with blunt apices. The generic name Anophococcus Balachowsky, 1954 is considered here as a synonym of Acanthococcus (synonymized by Danzig 1980: 205)].

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).