Diphylleidae (also Collodictyonidae) 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. It is the sister group of Sulcomonadidae.

Recent molecular analyses place collodictyonids (e.g. Collodictyon) in a clade also containing Rigifilida and Mantamonadidae. This clade has been named CRuMs and is sister to Amorphea.

Phylogeny

OpimodaAncyromonadida Cavalier-Smith 1998 emend. Atkins 2000 Malawimonadea Cavalier-Smith 2003 Podiata Amorphea Amoebozoa Lühe 1913 emend. Cavalier-Smith 1998 Obazoa Breviatea Cavalier-Smith 2004 Apusomonadida Karpov & Mylnikov 1989 Opisthokonta CRuMs Mantamonadida Cavalier-Smith 2004 Glissandrida Yazaki et al. 2025 Rigifilida Karpov & Mylnikov 1989 Diphylleida Diphylleidae Cavalier-Smith 1993 Sulcomonadidae Cavalier-Smith 2013
Ancyromonadida Cavalier-Smith 1998 emend. Atkins 2000
Malawimonadea Cavalier-Smith 2003 Podiata Amorphea Amoebozoa Lühe 1913 emend. Cavalier-Smith 1998 Obazoa Breviatea Cavalier-Smith 2004 Apusomonadida Karpov & Mylnikov 1989 Opisthokonta CRuMs Mantamonadida Cavalier-Smith 2004 Glissandrida Yazaki et al. 2025 Rigifilida Karpov & Mylnikov 1989 Diphylleida Diphylleidae Cavalier-Smith 1993 Sulcomonadidae Cavalier-Smith 2013
Malawimonadea Cavalier-Smith 2003
PodiataAmorphea Amoebozoa Lühe 1913 emend. Cavalier-Smith 1998 Obazoa Breviatea Cavalier-Smith 2004 Apusomonadida Karpov & Mylnikov 1989 Opisthokonta CRuMs Mantamonadida Cavalier-Smith 2004 Glissandrida Yazaki et al. 2025 Rigifilida Karpov & Mylnikov 1989 Diphylleida Diphylleidae Cavalier-Smith 1993 Sulcomonadidae Cavalier-Smith 2013
AmorpheaAmoebozoa Lühe 1913 emend. Cavalier-Smith 1998 Obazoa Breviatea Cavalier-Smith 2004 Apusomonadida Karpov & Mylnikov 1989 Opisthokonta
Amoebozoa Lühe 1913 emend. Cavalier-Smith 1998
ObazoaBreviatea Cavalier-Smith 2004 Apusomonadida Karpov & Mylnikov 1989 Opisthokonta
Breviatea Cavalier-Smith 2004
Apusomonadida Karpov & Mylnikov 1989 Opisthokonta
Apusomonadida Karpov & Mylnikov 1989
Opisthokonta
CRuMsMantamonadida Cavalier-Smith 2004 Glissandrida Yazaki et al. 2025 Rigifilida Karpov & Mylnikov 1989 Diphylleida Diphylleidae Cavalier-Smith 1993 Sulcomonadidae Cavalier-Smith 2013
Mantamonadida Cavalier-Smith 2004
Glissandrida Yazaki et al. 2025 Rigifilida Karpov & Mylnikov 1989 Diphylleida Diphylleidae Cavalier-Smith 1993 Sulcomonadidae Cavalier-Smith 2013
Glissandrida Yazaki et al. 2025
Rigifilida Karpov & Mylnikov 1989 Diphylleida Diphylleidae Cavalier-Smith 1993 Sulcomonadidae Cavalier-Smith 2013
Rigifilida Karpov & Mylnikov 1989
Diphylleida Diphylleidae Cavalier-Smith 1993 Sulcomonadidae Cavalier-Smith 2013
DiphylleidaDiphylleidae Cavalier-Smith 1993 Sulcomonadidae Cavalier-Smith 2013
Diphylleidae Cavalier-Smith 1993
Sulcomonadidae Cavalier-Smith 2013

Taxonomy