Eolouka is an obsolete paraphyletic phylum of protists localized in the clade Discoba. It contains two lineages: Jakobea and Tsukubea, the last containing only one genus, Tsukubamonas.

In 1999 Cavalier-Smith proposed a new paraphyletic phylum of flagellates called Loukozoa, containing only the jakobids. In 2013 it was modified to contain three subphyla:

However, in later years these three groups were raised to the rank of phylum.