Apyrene spermatozoa in Achroia grisella (Lepidoptera: Piralidae): a honeybee waxmoth

Diet impacts the reproductive system’s maturation in the male moth Agrotis ipsilon (Noctuidae, Lepidoptera)

“…During the sexual maturation of male moths, the reproductive system is subjected to morphoanatomical and functional modifications (Hiroyoshi et al, 2021;Moors et al, 2009). The testes, which produces the sperm, decrease in volume (Klein et al, 2021) and the sperm bundles are transferred from the testes to the duplex where is formed the spermatophore that is then transferred to the female during copulation (Baker et al, 2003;Fernandez & Cruz-Landim, 2005;Muzzi et al, 2020). Conjointly, the accessory sex glands grow in length (Baker et al, 2003), change color (Fernandez & Cruz-Landim, 2005;Muzzi et al, 2020), and produce proteins (but also carbohydrates and lipids) (Southon et al, 2020) that are necessary for the formation of the spermatophore and also for the sperm survival during their storage within the duplex and their transit in the female genital duct (Fernandez & Cruz-Landim, 2005;Muzzi et al, 2020).…”

Field and Laboratory Studies on the Ecology, Reproduction, and Adult Diapause of the Asian Comma Butterfly, Polygonia c-aureum L. (Lepidoptera: Nymphalidae)

“…However, sperm polyphenism is known in several orders and species of insects [14]. In Lepidoptera, sperm diphenism, i.e., eupyrene (nucleate) and apyrene sperm (anucleate), is known [15,16,17], except for groups of primitive moths [18,19]. The function of apyrene sperm is unclear.…”