Diplopoda: Polydesmidae: Notodesmus scotius ?
At about 11:30 am, this brightly colored millipede (what I at first thought was a caterpillar) was crossing the walking trail in Wildwood Park. It curled up into a ball when first discovered, then in about 30 seconds, uncurled and traveled on as before.
One only on Dicksonia squarrosa, 3 cm long, in pristine, native forest.
Flat-backed millipede on forest duff
Found in leaf litter along a creek running through a residential green space in southwestern Ohio.
Black, 3-4 cm long
Millipedes are myriapods of the class Diplopoda that have two pairs of legs on most body segments. Each double-legged segment is a result of two single segments fused together as one (the name "Diplopoda" comes from the Greek words διπλοῦς (diplous), "double" and ποδός (podos), "foot"). Most millipedes have very elongated cylindrical or flattened bodies with more than 20 segments, while pill millipedes are shorter and can roll into a ball, like a pillbug.