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Atypical, ventro-ventral copulation position in aphids of the genus Stomaphis Walker, 1870 (Insecta, Hemiptera) Naturalis
Depa, L.; Kanturski, M.; Taszakowski, A.; Wieczorek, K..
Firm matching of genitals during copulation is of critical importance to effective insemination and thus, gene flow. During the evolution of insects, an effective position during copulation promoted higher fecundity through control over the act of mating or elimination of competitors. Usually during insect copulation, either twisting or flexing of the male abdomen occurs, and genitals remain symmetrically or asymmetrically disposed following changes in the mating position. However, it is always the dorsal side of the male genitalia that makes contact with the ventral side of female abdomen. Here we present the unusual case of a ‘belly-to-belly’ copulation, with symmetrically positioned male genitals and no twisting of the abdomen. During the mating of two...
Tipo: Article / Letter to the editor Palavras-chave: Aphididae; Dwarfism; Mate guarding; Sexual competition; Speciation; 42.75.
Ano: 2014 URL: http://www.repository.naturalis.nl/record/480053
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Precopulatory mate guarding in copepods Naturalis
Boxshall, Geoffrey A..
In many copepod species adult males clasp females for an extended period before transferring spermatophores. Clasping juvenile females (first to fifth copepodid inclusive) is interpreted as mate guarding and is shown to be widespread among podoplean copepods. It is distinct from copulation, which takes place only between adults and is often distinguishable from mate guarding by a difference in clasping posture.
Tipo: Article / Letter to the editor Palavras-chave: Copepods; Mate guarding; Copulation; Mating behaviour.
Ano: 1990 URL: http://www.repository.naturalis.nl/record/504390
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