Traumatic insemination.

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Oct 27, 2007
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ahenkel

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The Harpactea sadistica spiders, on the other hand, are much worse. The male spider will pierce through the female's abdomen repeatedly, making two long rows of holes. Sometimes several male spiders will join in. This method is clearly not very effective and this species of spider is slowly shrinking into nonexistence.

Evolution fail.
 

Udgnim

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Apr 16, 2008
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wikipedia entry about it is an interesting read

In the genus Afrocimex, both species have well developed ectospermalege (but only females have a mesospermalege). The male ectospermalege is slightly different from that found in females, and amazingly enough, Carayson (1966) found that male Acrocimex suffer actual homosexual traumatic inseminations. He found that the male ectospermalege often showed characteristic mating scars, and histological studies showed that "foreign" sperm were widely dispersed in the bodies of these homosexually mated males. Sperm cells of other males were, however, never found in or near the male reproductive tract. It therefore seems unlikely that sperm from other males could be inseminated when a male that has himself suffered traumatic insemination mates with a females. The costs and benefits, in [sic] any, of homosexual traumatic insemination in Afrocimex remain unknown.[1]

o_O
 
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