Provora: tiny predators that have been evolving separately for millions of years

https://en.wikipedia.org/wiki/Provora

The Provora supergroup is genetically, morphologically and behaviourally distinct from other eukaryotes, and comprises two divergent clades of predators—Nebulidia and Nibbleridia—that are superficially similar to each other, but differ fundamentally in ultrastructure, behaviour and gene content. These predators are globally distributed in marine and freshwater environments, but are numerically rare and have consequently been overlooked by molecular-diversity surveys.

https://www.nature.com/articles/s41586-022-05511-5?error=coo...