Ventrata is an infraphylum of ciliates inside the subphylum Intramacronucleata that unites the classes Phyllopharyngea, Colpodea, Nassophorea, Prostomatea, Plagiopylea and Oligohymenophorea.

[2] Members of this taxon are characterized by having, ancestrally, a ventral cytopharynx,[1] as the name suggests.

The monophyly of CONthreeP is well supported, being placed as sister to Protocruziea.

[2] The order Discotrichida, belonging to class Nassophorea, has been recovered as the earliest branch of the clade.

[2] Protocruziea Discotrichida (Nassophorea) Colpodea Nassophorea Phyllopharyngea Oligohymenophorea Prostomatea Plagiopylea