pseudotrichomonas keilini pseudotrichomonas keilini pseudotrichomonas keilini is a species of excavates that was discovered by ann bishop in 1939. pseudotrichomonas keilini scientific classification domain: eukaryota (unranked): excavata phylum: metamonada class: parabasalia order: trichomonadida genus: pseudotrichomonas species: p. keilini binomial name pseudotrichomonas keilinibishop, 1939