SYNOPSIS. A new family (Pseudocohnilembidae) of hymenostome ciliates is described based primarily upon the pattern of the buccal infraciliature which consists of two parallel rows of kinetosomes, nearly equal in length, representing the bases of two large

Ciliated protists were isolated from the ovarian fluid of apparently healthy adult rainbow trout (Oncorhynchus mykiss) maintained in freshwater. The organism was identified as Pseudocohnilembus persalinus based on morphometric and morphological analysis

The life cycles of two related marine ciliates, Uronema marinum and Pseudocohnilembus pusillus were studied. Both species are adapted to exploit patches with high densities of bacteria such as decaying particulate matter. When growing cells of Uronema