Abstract
Three marine interstitial scuticociliates, including two new species (Schizocalyptra similis sp. n., S. sinica sp. n.) and one insufficiently described form (Hippocomos salinus Small and Lynn, 1985) collected from sandy beaches in China, were morphologically investigated. The small Subunit rRNA gene of the two new Schizocalyptra species was sequenced in order to compare with that of the only other sequenced congener, S. aeschtae. Both forms investigated in the present paper are demonstrated to be distinctive members of this relatively poorly known genus. Hippocomos salinus was observed in vivo for the first time. A redescription and improved diagnosis are here supplied based on the China-population.