Fascinating article. Rotifers are another great example of parthenogenesis. Some species can switch between sexual or asexual reproduction. This is believed to optimize colonization via rapid reproduction.

Some species of rotifer are entirely parthenogenetic, showing animals can persist without sex (bad news, I know). And importantly here, parthenogenetic animals can keep evolving. When populations bloom in favourable conditions, enough genetic variation accumulates to respond to change.