Twin intromittent organs of Drosophila for traumatic insemination

研究成果: Article査読

95 被引用数 (Scopus)

抄録

In several animals, male genitalia create insemination wounds in areas outside the genital orifice of females. I report that such traumatic insemination (TI) occurs in the Drosophila bipectinata complex (Diptera: Drosophilidae) and illustrate a previously unknown evolutionary pathway for this behaviour. Flash fixation of mating pairs revealed the dual function of the paired claw-like basal processes, previously misidentified as a bifid aedeagus: (i) penetration of the female body wall near the genital orifice and (ii) sperm transfer into the genital tract through the wounds. Basal processes in closely related species (Drosophila ananassae and Drosophila pallidosa) also wounded females but did not transfer sperm; this represents a transitional state to TI as observed in the bipectinata complex. Copulatory wounding is suggested to occur in other allied species of the Drosophila melanogaster species group, including D. melanogaster. Ubiquitous sexual conflicts over mating may have led to the evolution of novel intromittent organs for insemination.

本文言語English
ページ(範囲)401-404
ページ数4
ジャーナルBiology letters
3
4
DOI
出版ステータスPublished - 2007 8月 22
外部発表はい

ASJC Scopus subject areas

  • 農業および生物科学(その他)
  • 農業および生物科学(全般)

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