First report of aberrant sperm in Edessinae and analysis of the male reproductive system of Edessa rufomarginata (De Geer, 1773) (Hemiptera: Pentatomidae).

Edessinae is one of the ten subfamilies of Pentatomidae, and it is further divided into seven genera. Among these, Edessa Fabricius, 1803 is the most diverse genus, boasting around 300 species recognized for their ecological and economic significance worldwide. The inclusion of various pentatomids in the Edessa genus has led to mistakes in its taxonomy due to common morphological features and misidentifications.

Evidence of antiparallel sperm bundles and limited sperm production in adult males of Phaleria testacea Say, 1824 (Tenebrionidae, Diaperinae).

In this study, we investigated the male reproductive system and sperm morphology of Phaleria testacea using both light and transmission electron microscopy. Our findings revealed important testicular features, such as the antiparallel arrangement of sperm in the testicular cysts, limited sperm prodution in adult males, defective spermatozoa, and bodies of cellular membranes in deterioration. We also observed more spermatids per cyst than in most Tenebrionoidea.

Morphology of the male reproductive system and spermatozoa of Smicridea (Rhyacophylax) iguazu Flint, 1983 (Trichoptera, Hydropsychidae).

The Trichoptera, holometabolous aquatic insects found worldwide except in Antarctica, exhibit a unique feature in their sperm, which are solely nucleated (eupyrene). Current knowledge on Trichoptera sperm is limited to Old World species. To enhance our understanding of their reproductive biology and contribute to systematic discussions, we describe the male reproductive system and spermatozoa of Smicridea (Rhyacophylax) iguazu Flint, 1983 (Hydropsychidae).

Sperm morphology of Tingidae Laporte, 1833 (Miroidea: Cimicomorpha).

Here, we describe for the first time the sperm morphology of Tingidae (Heteroptera). They are small insects presenting lacy patterns on their pronotum and hemielytra and are exclusively phytophagous, with many economically important species. We studied five species of the tribe Tingini (Tinginae): Teleonemia scrupulosa, Vatiga illudens, Gargaphia lunulata, Leptopharsa sp.

Morphology of the male reproductive system and spermatozoa of Mahanarva fimbriolata (Stål, 1854) (Hemiptera: Cercopidae) with evidence of a spermatostyle in the sperm conjugation.

Changes in harvesting methods in the early 1990s led to Mahanarva fimbriolata becoming the most prevalent pest in sugarcane plantations. Encouraged by the scarcity of research on the reproductive system and spermatology of Auchenorrhyncha, we provide a detailed description of the male reproductive system and spermatozoa of this cercopid. This will not only aid in taxonomic purposes but also help in understanding the reproductive biology of the species.