- style="background:#e0d0b0;" Likely cladogram of Eukarya Several authorities recognize two larger clades, the unikonts and the bikonts, that derive from an ancestral uniflagellar organism and a biflagellate respectively. In this system, the opisthokonts and amoebozoans are considered unikonts, and the rest bikonts. The chromalveolates were originally thought to be two separate groups, the chromists and the alveolates, but the former was proved to be paraphyletic to the latter, and the two group… (More on Eukaryote)