Haplocaulus furcellariae Precht, 1935
Report as epibiont on bryozoans: This species was described as epibiont on marine bryozoan Furcellaria sp. in Kiel Bay, the North Sea (Precht 1935).
Reamrks: The species was also listed as planktonic ciliate in the Baltic Sea (Mironova et al. 2009) but this find needs verification.