The term phylum was given by:

Explanation

The term phylum was coined in 1866 by Ernst Haeckel from the Greek phylon (φῦλον, "race, stock"), related to phyle (φυλή, "tribe, clan"). The concept of "phylum" was actually developed by the German biologist Ernst Haeckel (1834-1919) in the 19th century. Haeckel is credited with proposing the term "phylum" as a rank in the hierarchy of biological classification to group organisms with similar body plans and organizational features.