acidianus acidianus in taxonomy, acidianus is a genus of the sulfolobaceae. acidianus acidianus convivator cell showing extrusion of acidianus two-tailed virus particles. scientific classification domain: archaea phylum: thermoproteota class: thermoprotei order: sulfolobales family: sulfolobaceae genus: acidianussegerer, neuner, kristjansson & stetter 1986 species a. ambivalens a. brierleyi "a. convivator" "ca. a. copahuensis" "a. hospitalis" a. infernus "a. manzaensis" "a. pozzuoliensis" a. sulfidivorans "a. tengchongenses" "a. uzoniensis" synonyms desulfurolobus zillig & bock 1987