The orb-web spider Nephilengys malabarensis is sexually cannibalistic and the male has detachable genitals. These spiders have at most two chances to mate: They have a pair of sperm-transferring organs, actually called their "palps" but analogous to a penis, which detach from their bodies when they disengage from mating — either when the female pushes them away and possibly eats them or they successfully run away to risk death another day.
"However, some spider species exhibit extreme genital mutilation or the 'eunuch phenomenon,' where males castrate their entire pedipalp(s) during copulation," Li, author of a new study on this process, told LiveScience. |
發表於 2012-2-2 10:28 AM
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