Sphaerobelum

Sphaerobelum is a genus of giant pill-millipedes in the family Zephroniidae, endemic to Southeast Asia, with most species occurring in Thailand, Laos and Vietnam. Members of this genus are characterised by volvation, jewel-like coloration and distinct morphological adaptations. Several species are restricted to limestone karsts and forested habitats and recent molecular studies confirm the genus' distinctness from closely related genera such as Zephronia.

==Description== Sphaerobelum are medium to large-sized millipedes, capable of rolling into a tight ball when threatened which is a typical trait of the order Sphaerotheriida. Their bodies consist tergites, with a glossy exoskeleton that may exhibit colors such as turquoise and dark green depending on species. The also have ocelli and their antennae may be short and club-shaped. They have posterior telopods, with four podomeres and a large process on the second podomere with a large tip.