Millipedes, myriapods of the class Diplopoda, contain approximately 12,000 described species organized into 16 extant orders and approximately 140 families. This list is based on Shear, 2011, sorted alphabetically by order and taxonomically within order. Note: The names of millipede orders end in "-ida"; suborders end in "-idea". Superfamilies end in "-oidea", while families end in "-idae".