Structure of ovaries in scale insects. i. pseudococcidae, kermesidae, eriococcidae, and cryptococcidae (INSECTA, hemiptera, COCCINEA)

International Journal of Insect Morphology and Embryology Pub Date : 1998-07-01 DOI:10.1016/S0020-7322(98)00007-5

Teresa Szklarzewicz

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引用次数: 29

Abstract

Developing ovaries of scale insects (Hemiptera : Coccinea) Nipaecoccus nipae (Pseudococcidae) and Cryptococcus fagisuga (Cryptococcidae) contain clusters of interconnected cells (cystocytes) that are arranged into rosettes; polyfusomes occur in the centres of the rosettes. Ovaries of the investigated adult scale insects are composed of numerous short telotrophic ovarioles. Tropharia (trophic chambers) of Dysmicoccus newsteadi (Pseudococcidae), Eriococcus buxi (Eriococcidae), Cryptococcus fagisuga and Pseudochermes fraxini (Cryptococcidae) comprise only trophocytes (nurse cells), whereas those of Kermes quercus (Kermesidae) and Gossyparia spuria (Eriococcidae) also contain arrested oocytes. The latter probably degenerate. It is suggested that during evolution of scale insects a gradual reduction of germ cells to 4 per cluster (3 trophocytes and 1 oocyte) took place. In light of the obtained results, anagenesis of scale insects ovarioles is discussed.

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蚧虫子房的结构。1 .假球虫科、鸡翅虫科、隐球虫科(昆虫亚目、半翅目、球虫亚目)

鳞虫(半翅目:球虫目)发育中的子房Nipaecoccus nipaae(假球虫科)和fagisuga隐球菌(隐球虫科)含有相互连接的细胞簇(囊细胞)，它们排列成莲座;多丝体出现在莲座的中心。所研究的成虫的卵巢由许多短的远营养卵巢组成。newsteaddysmiccoccus(拟球虫科)、buxi Eriococcus(拟球虫科)、fagisuga隐球菌和Pseudochermes fraxini(隐球虫科)的滋养细胞(营养室)仅包含滋养细胞(护理细胞)，而Kermes quercus (Kermesidae)和Gossyparia spuria (Eriococcidae)的滋养细胞也含有被阻滞的卵母细胞。后者可能会退化。在蚧虫的进化过程中，生殖细胞逐渐减少到每簇4个(3个滋养细胞和1个卵母细胞)。在此基础上，对蚧虫卵巢发育进行了讨论。

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International Journal of Insect Morphology and Embryology

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