Some research suggests that a unikont (a eukaryotic cell with a single flagellum) was the ancestor of opisthokonts (Animals, Fungi, and related forms) and Amoebozoa, and a bikont was the ancestor of Archaeplastida (Plants and relatives), Excavata, Rhizaria, and Chromalveolata.

[3] An alternative to the Unikont–Bikont division was suggested by Derelle et al. in 2015,[4] where they proposed the acronyms Opimoda–Diphoda respectively, as substitutes to the older terms.

[suggested singular forms are Opneme-Dipheme respectively][citation needed] A "classical" cladogram (data from 2012, 2015) is:[5][6] Archaeplastida (inc. land plants) Cryptophyta Haptophyta Rhizaria Heterokont Alveolata Excavata Unikonta However, a cladogram (data from 2015, 2016) with the root in Excavata is[4][7][8] Archaeplastida (inc. land plants) Cryptista Haptista Rhizaria Heterokonta Alveolata Discoba Metamonada?

Neolouka Collodictyon Varisulca Amoebozoa Apusomonadida Breviata Opisthokonta The corticates correspond roughly to the bikonts.

While Haptophyta, Cryptophyta, Glaucophyta, Rhodophyta, the SAR supergroup and Viridiplantae are usually considered monophyletic, Archaeplastida may be paraphyletic, and the mutual relationships between these phyla are still to be fully resolved.