Evidence is provided of a previously unreported internal strategy to sustain monogamy in females of two ditrysian moths: Arrenophanes perspicilla (Stoll), (Arrenophaninae: Psychidae) and Glyphidocera virgulae Adamski, 2005 (Gelechioidea: Glyphidoceridae). In both cases, the ductus seminalis of the female is blocked by the spermatophore of the first conspecific male, preventing the sperm of subsequent males from reaching the oviduct and fertilizing eggs. Coevolutionary morphological features of male and female genitalia and are illustrated and speculation of post-mating behaviors are discussed briefly.
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Adamski et al. (2025) studied this question.
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