Just a quick update, I added a new page to my website: Millipede & Centipede Identification. It’s a big list of websites, published papers, and books that are useful for identifying millipedes and centipedes. This is mostly to save myself some time whenever I get the general question of “do you have any resources you can send me to help me identify millipedes?” I always welcome that type of question, but it’s a big time sink to actually pull together all those resources. Now I’ll just send you to this page!
The resources are mostly for eastern North America, but may be useful for other regions. If you know of a good resource that I missed, let me know and I’ll add it to the page!