The class Aelosomata contains about 25 species of small to minute worms with many chaetae. They live in the interstitial zone of both fresh and brackish water environments. They are hermaphrodites with each animal possessing one ovary and two testis. They are little known to science and their classification is disputed with some authors considering them to be part of the Oligochaeta. http://earthlife.net/inverts/annelida.html