Collodictyonidae (also Diphylleidae) is a group of aquatic, unicellular eukaryotic organisms with two to four terminal flagella.

They feed by phagocytosis, ingesting other unicellular organisms like algae and bacteria.

The most remarkable fact of this clade is its uncertain position in the tree of life.

Recent molecular analyses place Collodictyonids (e.g. Collodictyon) in a clade also containing Rigifilida and Mantamonadidae.

Atkins 2000 Malawimonadea Cavalier-Smith 2003 Amoebozoa Lühe 1913 emend.