Wongthamwanich, N., Panha, S., Sierwald, P., Wesener, T. & Thirakhupt, K. (2012) A new species of the giant pill-millipede genus Sphaerobelum Verhoeff, 1924 from northern Thailand, with an extensive description and molecular characters (Diplopoda: Sphaerotheriida: Zephroniidae) . Zootaxa, 3220 (1), 29–43.