Compiled from Shelley's Annotated Checklist of the Millipeds of California (Arthropoda: Diplopoda) from 2002, where he lists counties for all species, as well as some information about introduced species. I have not marked these lists as comprehensive because many of the ranges Shelley describes are discontinuous, which for many species I suspect to be due to under-collection rather than disparate populations. Millipedes are vastly under-studied, so that wouldn't be surprising. If you're using these lists as identification tools, checklists from adjacent counties, as well as the state-wide list. I have also not marked the non-introduced species as native or endemic, though no doubt many of them are, because Shelley does not explicitly do so in his paper. Please feel free to update the listed taxa with this information, though.

Millipedes - Photo (c) Marshal Hedin, some rights reserved (CC BY-NC-SA), uploaded by Marshal Hedin Check list for Millipedes (Class Diplopoda)
Source: Shelley, R. M. (2002). Annotated Checklist of the Millipeds of California (Arthropoda: Diplopoda). Monographs of the Western North American Naturalist, 1: 90–115. (Link)
kueda Added by kueda on February 08, 2015