Pocock, 1887 
Armadillomorpha Verhoeff, 1915
Pill millipedes make up two orders of millipedes, often grouped together into a single superorder, Oniscomorpha. The name Oniscomorpha refers to the resemblance of pill millipedes to certain woodlice, namely the pillbugs of the family Armadillidiidae, also called "potato bugs", or "roly-polies".
Pill millipedes are short compared to other millipedes, with only eleven to thirteen body segments, and are capable of rolling into a ball when disturbed. This ability evolved separately in each of the two orders, making it a case of convergent evolution, rather than homology. Pill millipedes are detritivorous, feeding on decomposing plant matter, usually in woodlands.
The Order Glomerida is found in the Northern Hemisphere and includes species such as Glomeris marginata, the common European pill millipede. They have from eleven to twelve body segments, and lack the defensive repugnatorial glands (ozopores) found on many other millipedes. The order contains members in Europe, South-east Asia and the Americas from California to Guatemala. Three species are present in the British Isles.
The Order Sphaerotheriida is a Gondwana-distribution taxon, with around 100 species in southern Africa, Madagascar, Australasia and South East Asia. They have thirteen body segments, and do not possess repugnatorial glands. Five species, all in the genus Procyliosoma are present in New Zealand, and around thirty species in three or more genera are present in Australia.
|Wikispecies has information related to: Oniscomorpha|
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