acinetactis acinetactis acinetactis is a possible genus of protist first described in 1886 by a.c. stokes, who also described the type species a. mirabilis. in 1928, valkanov reported the discovery of a second species, a. arnaudovii. the most recently recorded specimen of a. mirabilis was reported in 1940, no acinetactis specimens have been reported since. acinetactis acinetactis mirabilis scientific classification domain: eukaryota clade: diaphoretickes clade: sar phylum: cercozoa class: sarcomonadea order: glissomonadida family: acinetactidae genus: acinetactisa.c. stokes the validity and classification of this genus is contested. in 1914, adolf pascher cast doubt on acinetactis, suggesting that it was a junior synonym of dimorpha mutans. cavalier-smith classified acinetactis as a heliomonad in 1993. bass et al. suggested in 2009 that the genus was a cercozoan in the class granofilosea.