Follicular cell differentiation in polytrophic ovaries of a moth midge, Tinearia alternata

Morphogenesis of the ovarian follicular epithelium during initial stages of embryogenesis of the viviparous earwig, Hemimerus talpoides

“…In the light of these results, we conclude that such important activities characteristic of insect FCs as migrations and planar rearrangements, are in Hemimerus shifted in time (“postponed”) and become initiated as late as after egg fertilization. This, in turn, emphasizes once more the plasticity of developmental programmes operating during differentiation and/or diversification of insect FCs (see Garbiec & Kubrakiewicz, ; Mazurkiewicz & Kubrakiewicz, ; Tworzydlo, Jablonska, Kisiel, & Bilinski, for further details).…”

“…This intriguing, genetically regulated process leads to the formation of eight morphologically and functionally distinct subpopulations of cells that, after termination of yolk accumulation, participate in the formation of regionally specialized egg coverings (internal vitelline envelope and external chorion) termed collectively the eggshell. Diversification of the follicular cells has been also described in several other holometabolous and hemimetabolous insects, including non‐ Drosophila dipterans (gnats, snipe flies, and horse flies), lepidopterans (butterflies), neuropterans (lacewings), hymenopterans (parasitic wasps and wasps), mecopterans (scorpionflies), hemipterans (true bugs), mallophagans (bird‐lice), and plecopterans (stoneflies), for example, Tworzydlo, Jablonska, Kisiel, and Bilinski (), Jaglarz, Krzeminski, and Bilinski (), Jaglarz, Kubrakiewicz, and Bilinski (), Mazurkiewicz and Kubrakiewicz (), Garbiec and Kubrakiewicz (), and Mazurkiewicz‐Kania, Simiczyjew, and Jedrzejowska (). As a rule, the complexity of the eggshell of a given species depends on the number of the subpopulations of the follicular cells.…”

Ovarian Development of House Fly (Musca domestica L.) (Diptera: Muscidae)

“…Investigation of reproductive system of insect female is imperative founded on the point that such organs as the ovary goal to precisely yield several progeny in every generation in the somewhat short life time of adult insects. Previous investigation has been showed to examine the ultrastructure insect ovaries in various species (Cochliomyia hominivora) [17]; the snipe fly(Rhagio lineola) [18]; (Tinearia altemata) [19]; dragon fly [20]; Apis mellifera [21] and Haemato pinssuis [22].…”

Asymmetry in structure of the eggshell in Osmylus fulvicephalus (Neuroptera: Osmylidae): an exceptional case of breaking symmetry during neuropteran oogenesis

“…Mechanisms that govern follicular cell diversification in insect ovaries are best known in a model organism, the fruit fly, Drosophila melanogaster (Margolis and Spradling 1995 ; Deng and Bownes 1998 ; Dobens and Raftery 2000 ; Tepass et al 2001 ; Horne-Badovinac and Bilder 2005 ; Nystul and Spradling 2010 ). Comparative studies conducted on different insect groups reveal that the pattern of follicular cell diversification is group specific (Zawadzka et al 1997 ; Kubrakiewicz et al 2003 ; Mazurkiewicz and Kubrakiewicz 2005 , 2008 ; Tworzydło et al 2005 ; Żelazowska 2005 ; Ogorzałek 2007 ; Jaglarz et al 2008 , 2009 , 2010 ; Garbiec and Kubrakiewicz 2012 ; Mazurkiewicz-Kania et al 2012 ). It has been shown also that distinct subpopulations of follicular cells contribute to different processes that take place during oogenesis like e.g., vitellogenesis, establishing of the embryo polarity and eggshell formation (see e.g., Büning 1994 ).…”