haptista haptista haptista is a proposed group of protists made up of centrohelids and haptophytes. phylogenomic studies indicate that haptista, together with ancoracysta twista, forms a sister clade to the sar+telonemia supergroup, but it may also be sister to the cryptista (+archaeplastida). it is thus one of the earliest diverging diaphoretickes. haptista scientific classification (incertae sedis within eukaryota) domain: eukaryota (unranked): diaphoretickes (unranked): haptistacavalier-smith 2015 phyla centrohelida haptophyta possible sister: alveidia taxonomy based on studies done by cavalier-smith, chao & lewis 2015 and ruggiero et al. 2015. subphylum centroheliozoa cushman & jarvis 1929 sensu durrschmidt & patterson 1987 class centrohelea kuhn 1926 stat. n. cavalier-smith 1993 subphylum haptophytina cavalier-smith 2015 (haptophyta hibberd 1976 sensu ruggerio et al. 2015) clade rappemonada kim et al. 2011 class rappephyceae cavalier-smith 2015 clade haptomonada (margulis & schwartz 1998) class pavlovophyceae (cavalier-smith 1986) green & medlin 2000 class prymnesiophyceae christensen 1962 emend. cavalier-smith 1996