Xystocheir is a genus of millipedes in the family Xystodesmidae. The genus is endemic to California in the United States, where it is distributed in the Coast Ranges and the Sierra Nevada. Since a 1996 revision there have been 9 species classified in the genus: - Xystocheir bistipita - Xystocheir brachymacris - Xystocheir dissecta - Xystocheir modestior - Xystocheir prolixorama - Xystocheir reducta - Xystocheir solenofurcata - Xystocheir stenomacris - Xystocheir stolonifera