The photo of the upside down one is a different dead individual I found of the same species. Live ones would rather roll into a pill than expose their bellies!
More details here: http://en.wikipedia.org/wiki/Sphaerotheriida
Location: Makunda Christian Hospital, Karimganj District, Assam
Date: 14th September 2012
Equipment: Nikon D300s with Nikkor AF 28-105mm lens
Found in the forest in the morning.
Swarming behaviour of the world’s largest giant pill-millipede species.
Probably juvenile individuals.
Geotagging only approximative.
Identification after : Wesener, Schütte; Madagascar Conservation and Development, Vol.5(2), Dec 2010.
This species seems to be the only species in the order Sphaerotheriida with swarming behaviour.
Madagascar, Andasibe-Mantadia National Park, October 28, 2005
(my most popular image; category : Views)
Sphaerotheriida (from the Latin sphaerium = ball) is an order of millipedes in the infraclass Pentazonia, sometimes known as giant pill millipedes. They inhabit southern Africa, Madagascar, South and Southeast Asia, Australia and New Zealand. Like the Northern Hemisphere pill millipedes of the order Glomerida, these millipedes can roll into a ball when disturbed. When they are rolled-up, most sphaerotheriids reach a maximum size of a cherry or golf ball, but some species from Madagascar can