Reference
J.K. Choi, D.W. Coats, D.C. Brownlee, Eugene Small (1992): Morphology and infraciliature of three species of *Eutintinnus* (Ciliophora; Tintinnina) with guidelines for interpreting protargol-stained tintinne ciliates – J. Protozool. – 39: 80 - 92.