Almost without exception, millipeds require a continuously moist substratum, yet they do not tolerate flooding. Other ecological factors that limit their distribution are subtle and difficult to recognize. Aniulus paludicolens, n. sp., is unique in that all collections are from Sphagnum bogs in the vicinity of the Great Lakes. It is best known from Byron Bog, in southern Ontario. This bog has the following vegetation zones: a, a central bog based on a mat of Sphagnum moss and covered almost entirely by leatherleaf; b, a low wooded region, damp or flooded, with hardwood trees and shrubs at its outer limits and black spruce and larch at its inner limits; and c, wooded slopes occupied by deciduous trees and shrubs. A. psludicolens occurs only in zones b and c, and in greatest numbers in the former. Other millipeds in the bog include A. bollmani Causey, which was collected only in zone c (Judd, 1965). These two species represent the most northern distribution of the genus, of which there are many species in the southern states and Texas. The species most closely related to A. paludicolens is A. pclitus Chamberlin , which occurs in disjunct polytypic populations in the mountain valleys of Arizona, Colorado, and New Mexico.
Causey, Neil B.
"Aniulus Paludicolens, N. SP. (Julida: Paraiulidae), a Bog-Dwelling Milliped,"
The Great Lakes Entomologist: Vol. 1
, Article 3.
Available at: http://scholar.valpo.edu/tgle/vol1/iss4/3