The advances of phylogenetic studies allowed Cavalier-Smith to realize that all the phyla thought to be archezoans (i.e. primitively amitochondriate eukaryotes) had in fact secondarily lost their mitochondria, typically by transforming them into new organelles: Hydrogenosomes.
Iki tan s data win tiɣir tin phylogenetic ijraw nat i Cavalier-Smith ad ilmid as phyla fuk aɣilan aqqalan archezoans (awen imos amitochondriate eukaryotes wan aru) assujal mitochondria nasan fal amutti nasan s organelles Hydrogenosomes.