Journal ArticleDOI
Ultrastructural and functional aspects of the spermatheca of the African Migratory Locust Locusta migratoria migratorioides (Reiche and Fairmaire) (Orthoptera: Acrididae)
TLDR
The ultrastructure of the spermathecal epithelium of the African Migratory Locust Locusta migratoria migratorioides was investigated with the aid of transmission and scanning electron microscopic methods.Abstract:
The ultrastructure of the spermathecal epithelium of the African Migratory Locust Locusta migratoria migratorioides R. & F. (Orthoptera: Acrididae) was investigated with the aid of transmission and scanning electron microscopic methods. The unpaired spermatheca can be subdivided into a multiple coiled tube and a terminal bulb region with vestibule, small apical and extensive pre-apical diverticulum. The wall of the spermatheca consists of a chitin intima, a layer of epithelial cells with a distinct apical microvilli border and a layer of gland cells, whereby slender projections of the epithelial cells extend between the gland cells. Through extensive folding, the basal plasma membrane of the gland and epithelial cells form a huge labyrinth, which is bounded by a basal lamina. Extending into the above mentioned projections there are bundles of parallel-arrayed microtubules, which run perpendicular to the microvilli border of the epithelial cell. They end in the base region of the microvilli and in the basal labyrinth on hemidesmosomes and serve to provide a mechanically stressable anchorage for the epithelium. The gland cells show structures typical for the production of export proteins: ribosomes, rER, dictyosomes, as well as vesicles of different size and electron-density. Every gland cell contains an extracellular cavity, arising through invagination, which is coated with a microvilli border. Over an end-apparatus and a ductule joining onto it (also with chitin intima) the lumen of the extracellular cavity is connected with the spermathecal lumen. The release of secretions and other substances from the epithelium into the spermatheca lumen is as possible as the uptake of substances from the latter into the epithelium. Regional differences in the fine structure of the cuticular intima, epithelial and gland cells point to different functions of the epithelium in these regions.read more
Citations
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Journal ArticleDOI
Morphology of spermatheca and eggs of Coptosoma putoni Montandon, 1898 (Hemiptera: Plataspidae)
TL;DR: The egg batch characteristically has two rows of spike-shaped eggs attached to substrate, with an anterior pole bearing aero-micropylar processes always turned outward, as revealed by the scanning electron microscope.
Journal ArticleDOI
Parental crowding influences life-history traits in Locusta migratoria females.
Marie Pierre Chapuis,Laurent Crespin,Arnaud Estoup,Arnaud Augé-Sabatier,Antoine Foucart,Michel Lecoq,Yannis Michalakis +6 more
TL;DR: It is found that a rearing history of crowding led to reduced female oviposition times and increased offspring size but did not affect the developmental time, survival, fecundity, and the sex-ratio and the number of offspring.
Journal ArticleDOI
Morpho-physiological Differences of the Spermatheca of Attini Ants (Hymenoptera: Myrmicinae)
TL;DR: The presence of an internal secretory epithelium in A. sexdens suggests that their physiology for the maintenance of spermatozoa in viable conditions for egg fertilization might differ from A. piriventris and A. muelleri, in which only an external spermathecal gland was observed.
Journal ArticleDOI
Spermiophagy in the spermatheca of Melipona bicolor Lepeletier, 1836 (Hymenoptera, Apidae, Meliponini).
TL;DR: Departamento de Biologia Instituto de Biociencias UNESP, Av.
Journal ArticleDOI
Morphology and fine organization of the spermatheca of Haplotropis brunneriana (Orthoptera: Pamphagidae)
TL;DR: New data contribute to the understanding of the function of the spermatheca of H. brunneriana and indicate that the gland cells potentially fulfil a secretory role indicative of the abundance of mitochondria and microvilli.
References
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Journal ArticleDOI
Fine structure of insect epidermal glands
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Journal ArticleDOI
The formation and fate of the spermatophore in the African migratory locust, Locusta migratoria migratorioides Reiche and Fairmaire
Journal ArticleDOI
Fine structural organization of the spermatheca in the cockroach, Periplaneta americana.
Brij L. Gupta,David S. Smith +1 more
TL;DR: The detailed structure of the cockroach spermatheca is described and discussed firstly as an example of an insect integumentary gland, and secondly, from the standpoint of its role in reproduction.
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