Tremblay’s Salamander has sex with males of another species solely to get turned on enough to self-fertilize; sperm do not contribute DNA.
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Learned about Tremblay’s Salamander from Randall Monroe (
@xkcdComic)’s wonderful _What If_ (http://amzn.to/1YEOwmh ) which is full of such.
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species, reproduces by self-fertilization only. Via