The insects also apparently slept around. The now-fossilized male (in the photo above, at left) inserted his reproductive organ into the female's copulatory structure.
NEWS: Lasers Zap Heads of Flies to Expose Brains
It's unclear what happened after that, though. Somehow the two were entombed in this position.
What's remarkable is that their belly-to-belly mating position, and their genital symmetry, have remained static in froghoppers over the millions of years. We humans are forever "upgrading" this and that gadget but, in nature, if it isn't broken and the circumstances remain similar, it stays the same.
This isn't the first instance where copulating prehistoric species perished during the act, later fossilizing. Last year, a paper described a pair of mating turtles dating to the Eocene - 34 to 56 million years ago.
Photo: Li S, Shih C, Wang C, Pang H, Ren D (2013) Forever Love: The Hitherto Earliest Record of Copulating Insects from the Middle Jurassic of China. PLoS ONE 8(11): e78188. doi:10.1371/journal.pone.0078188