Subclass PENTAZONIA Brandt, 1833
Introduction
Subclass containing the orders Glomeridesmida, Glomerida and Sphaerotheriida (Hoffman 1980). 'Pill millipedes' in the latter two orders can roll themselves into a tightly closed ball.
References
Hoffman, R.L. 1980. Classification of the Diplopoda. Geneva : Muséum d'Histoire Naturelle, Genève 238 pp.