Aquatic invertebrates of Wisconsin have been studied extensively, but until recently, little work has been done with aquatic oligochaetes (segmented worms). Much of the previous work was primarily concerned with the tubificid fauna of the Great Lakes (Hiltunen 1961; Howmiller 1972; Howmiller and Beeton 1910; Spencer 1980). Also, Howmiller (1914) described the aquatic Oligochaeta found in the inland waters of Wisconsin, and Howmiller and Loden (1916) provided additional information which contains the most current list of species found in Wisconsin. A study was carried out during May and June 1980 at the University of Wisconsin - Milwaukee Field Station to determine composition and density of aquatic oligochaetes present in a bog lake (Mud Lake) and its inlet and outlet streams.
Smith, M.E. and J.L. Kaster. 1981. Aquatic Oligochaeta of Mud Lake, and its inlet and outlet stream. Field Station Bulletin 14(2): 14-19.