Excuse the poor quality photo, taken though the side of a tub. Read more for why!
This is one of our Aphistogoniulus Gigas pairs... Getting friendly! We've been lucky enough to see 2 pairings in their tub in the last month so are hoping to see some eggs soon.
Millipedes mate in a strange way. The males first climb on to the female and stroke her exoskeleton with their many many legs to show they aren't a threat and give her the signals. If she's feeling receptive she will twist around and they'll become entwined together. They'll position with their heads facing each other and tbe male will then start passing her the sperm with his gonopods, which she will take and fertilise the eggs with.
When she lays them, she'll wrap them in a protective case of frass and dirt, which the hatchlings will eat for a bio booster nutrition starter.