Malacophrys viridis sp.n. (Malacophryidae fam.n.), ein Ciliat (Protozoa, Ciliophora) mit Merkmalen der Kinetofragminophora und Oligohymenophora

The morphology, infraciliature, and silverline system of Malacophrys viridis sp.n., a green-yellow coloured ciliate with symbiotic blue-green algae is described. Dying animals discharge a substance with a dark red autofluorescence. This curious ciliate shares features of the classes Kinetofragminophora (basket) and Oligohymenophora (true buccal cavity with two adoral membranelles and a paroral membrane). Its infraciliature and silverline system shows criteria of the orders Prostomatida, Nassulida-, Parahymenostomatida, Hymenostomatida, and Scuticociliatida. This unique combination allows us to create the new family Malacophryidae whose systematic position remains uncertain. Perhaps they are primitive Nassulida or Parahymenostomatida.