An aedeagus (plural "aedeagi") is a reproductive organ of male insects through which they secrete sperm from the testes during copulation with a female insect. The sperm contains capsules called spermatophores, which contain the spermatozoa. In addition to the spermatophores, in some insect species the aedeagus also discharges a spermatophylax, which serves as a nutriment to the female.

The aedeagus is part of the male's abdomen, which is the most caudal of the three segments of an insect. The pair of testes of the insect are connected to the aedeagus through the so-called genital ducts. The aedeagus is part of the male insect's phallus, which also includes in some species the valvae, which are paired organs which help the male hold on to the female during copulation.

During copulation, the aedeagus connects with the ovipore of a female.

In males of most species of Lepidoptera (e.g. moths), the aedeagus has a sheath which is supported by an organ called the juxta, which is located between the aforementioned valvae.

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  • Aedeagus —   [zu griechisch aidoiikós »an den Schamteilen befindlich«] der, dünner röhrenförmiger Teil des Begattungsorgans bei Insekten. Der Aedeagus ist in der Regel artspezifisch sehr verschieden gebaut und wird daher als Bestimmungsmerkmal herangezogen …   Universal-Lexikon

  • Aedeagus — Wasserläufer bei der Paarung, Aedeagus deutlich erkennbar …   Deutsch Wikipedia

  • aedeagus — n.; pl. agi [Gr. aidoia, genitals; agein, to lead] (ARTHROPODA: Insecta) In males, the intromittent organ; distal part of the phallus: penis plus parameres; see penis, telopod …   Dictionary of invertebrate zoology

  • aedeagus — aedeagal, adj. /ee dee euh geuhs/, n., pl. aedeagi / guy , juy /. the phallus of a male insect. Also, aedoeagus. [ < NL < Gk aidoî(a) genitals + agós leader (deriv. of ágein to lead)] * * * …   Universalium

  • aedeagus — noun A copulatory organ of some male insects …   Wiktionary

  • aedeagus — ae·de·agus …   English syllables

  • aedeagus — …   Useful english dictionary

  • Chrysophyllis — Scientific classification Kingdom: Animalia Phylum: Arthropoda Class: Insecta …   Wikipedia

  • Membrum virile — Penis des Menschen Ein ausgestülpter Hemipenis einer Diamantklapperschlange (Crotalus adamanteus) Als Penis ( …   Deutsch Wikipedia

  • Penisverletzung — Penis des Menschen Ein ausgestülpter Hemipenis einer Diamantklapperschlange (Crotalus adamanteus) Als Penis ( …   Deutsch Wikipedia

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