Abstract
A new species of scale insects, Aclerda pseudozoysiae sp. n., is described and illustrated. The karyotypes and some aspects of reproductive biology and cytogenetics of the new species species and Aclerda takahashiiKuwana, 1932 were studied, representing the first data for the genus Aclerda Signoret, 1874 and the family Aclerdidae as a whole. Aclerda pseudozoysiae sp. n. has 2n=16, bisexual reproduction, and heterochromatinization of one haploid set of chromosomes in male stages of the life cycle, matching either a Lecanoid or a Comstockioid genetic system. Aclerda takahashii demonstrates 2n=18 and unusual type of parthenogenesis with diploid and haploid embryos (inside each gravid female) without heterochromatinization. Both species are ovoviviparous; all stages of embryonic development occur inside the mother’s body.
Highlights
The scale insect family Aclerdidae currently includes 5 genera with 58 species (ScaleNet – Ben-Dov et al 2012) distributed mainly in hot and dry, often semi-desert regions of the world
About 50% of the embryos inside each of the four dissected adult females demonstrated a heterochromatinization of one haploid set of chromosomes (Fig. 4), that is common for the majority of cytogenetically studied groups of the superfamily Coccoidea
Some of the cells showed a nucleolus located at the end of one of the longer chromosomes (Fig. 7)
Summary
The scale insect family Aclerdidae currently includes 5 genera with 58 species (ScaleNet – Ben-Dov et al 2012) distributed mainly in hot and dry, often semi-desert regions of the world. The study of the collected material has provided a possibility to present here some information on cytogenetics and reproductive biology of both discussed species. A contribution to the taxonomy, cytogenetics and reproductive biology of the genus Aclerda...
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