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  2. Sexual selection in spiders - Wikipedia

    en.wikipedia.org/wiki/Sexual_selection_in_spiders

    A male Eresus sandaliatus. Sexual selection in spiders shows how sexual selection explains the evolution of phenotypic traits in spiders.Male spiders have many complex courtship rituals and have to avoid being eaten by the females, with the males of most species surviving only a few matings and consequently having short life-spans.

  3. Trichonephila plumipes - Wikipedia

    en.wikipedia.org/wiki/Trichonephila_plumipes

    The variance in male body size of T. plumipes is 44.4, twice that of other male spiders of similarly sized species. This is because smaller males are less likely to be detected and cannibalized by females before copulation, but larger males can exclude small males from the central hub of the web where mating takes place.

  4. Gynandromorphism - Wikipedia

    en.wikipedia.org/wiki/Gynandromorphism

    The term comes from the Greek γυνή (gynē) 'female', ἀνήρ (anēr) 'male', and μορφή (morphē) 'form', and is used mainly in the field of entomology. Gynandromorphism is most frequently recognized in organisms that have strong sexual dimorphism such as certain butterflies, spiders, and birds, but has been recognized in numerous ...

  5. Sexual dimorphism - Wikipedia

    en.wikipedia.org/wiki/Sexual_dimorphism

    Female (left) and male (right) Argiope appensa, displaying typical sexual differences in spiders, with dramatically smaller males Hammock Spiders (Pityohyphantes sp.) courting. Female left and male right. Many arachnid groups exhibit sexual dimorphism, [45] but it is most widely studied in the spiders.

  6. Centris pallida - Wikipedia

    en.wikipedia.org/wiki/Centris_pallida

    If a female is found, he will attempt to mate with her either on the surface or at a nearby flower or tree. Other patrollers will sometimes attempt to steal a digging spot that another bee has found. If a bee has already found a female, another patroller bee may separate the male from the female so that it can copulate with the virgin.

  7. Argiope (spider) - Wikipedia

    en.wikipedia.org/wiki/Argiope_(spider)

    The male spider is much smaller than the female, [7] and unassumingly marked. When it is time to mate, the male spins a companion web alongside the female's. After mating, the female lays her eggs, placing her egg sac into the web. The sac contains between 400 and 1400 eggs.

  8. Epigyne - Wikipedia

    en.wikipedia.org/wiki/Epigyne

    The primary function of the epigyne is to receive and direct the palpal organ of the male during copulation. The various specific forms of epigynes are correlated, in each case, with corresponding specific differences in the palpus of the male. This specialization prevents individuals of different species from mating.

  9. Spider - Wikipedia

    en.wikipedia.org/wiki/Spider

    In these species the female appears to be able to activate the dormant sperm before oviposition, allowing them to migrate to the ovarian cavity where fertilization occurs. [45] [46] [47] The only known example of direct fertilization between male and female is an Israeli spider, Harpactea sadistica, which has evolved traumatic insemination. In ...