Structure of the female reproductive system of the lac insect,Kerria chinensis(Sternorrhyncha, Coccoidea: Kerridae)
| Autor: | David J. Merritt, Lertluk Ngernsiri, Wichian Piyajaraprasert, Wijit Wisoram |
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| Rok vydání: | 2014 |
| Předmět: |
Scale (anatomy)
biology media_common.quotation_subject Cell Biology Insect Female reproductive system biology.organism_classification Oocyte Sternorrhyncha Ovariole Rosette (botany) medicine.anatomical_structure Botany medicine Animal Science and Zoology Adult stage Ecology Evolution Behavior and Systematics media_common |
| Zdroj: | Acta Zoologica. 96:312-318 |
| ISSN: | 0001-7272 |
| DOI: | 10.1111/azo.12078 |
| Popis: | The ovaries of female lac insects, Kerria chinensis Mahd (Sternorrhyncha: Coccoidea: Kerridae), at the last nymphal stage are composed of several balloon-like clusters of cystocytes with different sizes. Each cluster consists of several clusters of cystocytes arranging in rosette forms. At the adult stage, the pair of ovaries consists of about 600 ovarioles of the telotrophic-meroistic type. An unusual feature when considering most scale insects is that the lateral oviducts are highly branched, each with a number of short ovarioles. Each ovariole is subdivided into an anterior trophic chamber (tropharium) containing six or seven large trophocytes and a posterior vitellarium harbouring one oocyte which is connected with the trophic chamber via a nutritive cord. No terminal filament is present. Late-stage adult females show synchronized development of the ovarioles, while in undernourished females, a small proportion of ovarioles proceed to maturity. |
| Databáze: | OpenAIRE |
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