CaseyidaeCaseyidae is a family of millipedes in the order Chordeumatida. Adult millipedes in this family have 30 segments. There are about 7 genera and at least 40 described species in Caseyidae.GeneraCaseya Cook & Collins, 1895Metopiona Gardner & Shelley, 1989Ochrogramma Gardner & Shelley, 1989Opiona Chamberlin, 1951Speoseya Causey, 1954Underwoodia Cook & Collins, 1895Vasingtona Chamberlin, 1941