What was that strangely symmetrical structure?
As usual, the Myrmecos commentariat was quick with the answer: the egg case (ootheca) of a German cockroach, Blatella germanica. Morgan Jackson of Biodiversity in Focus answered milliseconds ahead of the competition, so he picks up 10 points. But I’ll also give 5 points each to Jason C. and Julie Stalhut for the very, very close second.
Next week’s will be harder, I promise.