CaliforniulusCaliforniulus is a genus of cylindrical millipedes containing six species native to the western United States.DescriptionSpecies of Californiulus exhibit two major color patterns. Some are characterized by a broad stripe of light brown, orange or yellow extending down the dorsal surface, while others are banded in light brown against a dark gray or black base color. Adult individuals range from long and up to 4.7 mm wide.DistributionThe constituent species of Californiulus range from northern Washington south to Death Valley, California, and one species occurs separate from the others in a range from extreme eastern Oregon to Montana.