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Ultrastructural, histological and histochemical characteristics of the epithelial wall of the seminal vesicle of mature Scaptotrigona xanthotricha moure males (Hymenoptera, apidae, meliponini)
The epithelial cells of the seminal vesicles showed none of the features characteristically associated with a secretory function, which suggested that the material in which the spermatozoa were immersed in the vesicle lumen was produced elsewhere along the ducts and/or during sexual maturation of the males.
Structure and ultrastructure of spermatozoa in Meliponini (stingless bees) (Hymenoptera: Apidae).
It is concluded that it is possible to define a characteristic pattern for Meliponini spermatozoa, and species-specific differences are found that could be used in a taxonomic or phylogenetic evaluation.
Ultrastructural characterization of spermatozoa in euglossine bees (Hymenoptera, Apidae, Apinae)
Euglossine spermatozoa are the longest described to date for the Hymenoptera and include a head and a flagellar region and species-specific differences that might be useful in phylogenetic work on the group are noted.
Morphology of testicular and post-testicular spermatozoa in Microstigmus arlei Richards, 1972 and M. nigrophthalmus Melo, 1992 (Hymenoptera: Apoidea: Pemphredoninae) with phylogenetic consideration.
The sperm of Microstigmus arlei and Microstigmus nigrophthalmus are twisted in a spiral and consist of two regions: the head, formed by an acrosome and a nucleus, and the flagellum, formed by two
Structural and ultrastructural studies of male reproductive tract and spermatozoa in Xylocopa frontalis (Hymenoptera, Apidae).
In Xylocopa frontalis the reproductive tract is composed of testes, deferent ducts, seminal vesicles, accessory glands and an ejaculatory duct, and the spermatozoa are similar to the hymenopteran pattern.
Sperm morphology of mud dauber Sceliphron fistularium dahlbom (Hymenoptera: Apoidea: Sphecidae), as an indication of bees relation.
Comparison of S. fistularium sperm to data on Hymenoptera corroborates their proximity with bees and the response to E-PTA stains is similar to that observed in corbiculated Apidae, especially Meliponini bees.
Morphology of the male reproductive system and spermatozoa in Centris Fabricius, 1804 (Hymenoptera: Apidae, Centridini).
Studies on the morphology of the male reproductive system and spermatozoa in Hymenoptera have demonstrated the diversity of the information provided by these reproductive structures, which can be used in taxonomy studies and the phylogeny of this important group of insects.
New characteristics of the male reproductive system in the Meliponini bee, Friesella schrottkyi (Hymenoptera: Apidae): histological and physiological development during sexual maturation
The reproductive system of Friesella schrottkyi (Friese) has very different characteristics during sexual maturation, which may represent important physiological characteristics as well as evolutionary differences in relation to other Meliponini studied and may be useful in studies of this bee group as soon as similar descriptions are obtained for other closely related species.
Morphology of male reproductive system in three species of Trypoxylon (Trypargilum) Richards (Hymenoptera: Crabronidae).
The objective of this study was to describe the adult male reproductive system of three Trypoxylon (Trypargilum) species, which have similar reproductive systems, which are formed by a pair of testes, each one with three fusiforme follicles, from which emerges an efferent duct that later joins forming a deferent duct.
Sperm morphology of Trichospilus diatraeae and Palmistichus elaeisis (Hymenoptera: Chalcidoidea: Eulophidae).
The sperm morphology of the parasitoids Trichospilus diatraeae and Palmistichus elaeisis was investigated and characteristics suggest that Eulophidae is closely related to Trichogrammatidae and both of these families are more similar to Eurytomidae than Agaonidae.