percolomonas percolomonas percolomonas is a genus of free-living flagellate heteroloboseans, forming a clade with stephanopogon. percolomonas scientific classification domain: eukaryota (unranked): excavata phylum: percolozoa class: percolatea genus: percolomonasfenchel & patterson 1986 type species percolomonas cosmopolitus species p. cosmopolitus (ruinen 1938) fenchel & patterson 1986 p. denhami tong 1997 p. lacustris mylnikov 2016 p. similis lee et al. 2003 p. spinosus (klug 1936) larsen & patterson 1990 p. sulcatus (von stein 1878) larsen & patterson 1990 synonyms choanogaster pochmann 1959 the genus includes six described species (see infobox). however, p. cosmopolitus is likely a species complex containing multiple cryptic species of extremely similar morphology but significant genetic divergence.