lack genetic data, and are considered incertae sedis: arachnula cienkowski 1856 asterocaelum canter 1973 lateromyxa hülsmann 1993 monadopsis klein 1993 the following taxa have been associated with vampyrellida, but their placement is uncertain or might not belong to the group. gobiella borealis cienkowski 1880 hyalodiscus angelovica sawyer 1975 hyalodiscus caeruleus schaeffer 1926 hyalodiscus foliaceus lepsi 1931 hyalodiscus korotnewi mereschovsky 1879 hyalodiscus macronucleus lepsi 1931 hyalodiscus minimus lepsi 1960 hyalodiscus placopus hülssmann 1974 hyalodiscus simplex wohlfarth-bottermann 1977 vampyrella chaetoceratis (paulsen 1910) ostenfeld 1913 vampyrella labyrinthuloides (archer 1875) valkanov 1940 vampyrella montana (lankester 1896) valkanov 1940 vampyrellidium perforans surek & melkonian 1980 (nucleariid amoeba) vampyrellidium vagans zopf 1885 (nucleariid amoeba) vampyrellidium roseus (trichense 1885) schepotieff 1912 vampyrina buetschlii frenzel 1897 notes the term 'swarmers' is more specially used for ciliated, swimming cells such as gametes, so trophozoites is a more appropriate term. not to be confused with the diatom genus hyalodiscus ehrenberg 1845, which takes preference in the biological nomenclature for being described earlier.