From mega- + phylogeny. <span class="searchmatch">megaphylogeny</span> (countable and uncountable, plural <span class="searchmatch">megaphylogenies</span>) Relatively large-scale phylogeny...
From macro- + phylogeny. macrophylogeny (plural macrophylogenies) Large-scale phylogeny <span class="searchmatch">megaphylogeny</span>...