Full reference: O. F. Cook. 1895. Introductory note on the families of Diplopoda, in The Craspedosomatidae of North America. Annals of the New York Academy of Sciences 9:1-9
Parent taxon: Juliformia according to J. T. Hannibal and M. J. May 2020
See also Hoffman 1963, Štamberg and Zajíc 2008 and Wilson 2006
Sister taxa: Julida, Proglomeridae, Spirobolida, Spirostreptida
Subtaxa: Gaspestriidae Karstiulus Nyraniidae Plagiascetidae Xyloiulidae
Type: Xyloiulus
Ecology:
Distribution:
• Permian of United States (3: Oklahoma, Texas collections)
• Carboniferous of Belgium (1), Canada (3: Nova Scotia), Czechia (1), France (2), the United Kingdom (2), United States (4: Illinois, Ohio)
• Devonian of Canada (2: New Brunswick, Quebec), the United Kingdom (1)
Total: 19 collections including 25 occurrences