Intramacronucleate ciliates with oral apparatus, when present, distinct from somatic cilia, with a distinct right paroral dikinetid and typically three left oral polykinetids; oral structures in ventral oral cavity or deeper infundibulum, may extend onto and surround peristome; somatic cilia, monokinetids with anteriorly directed, distinct overlapping kinetodesmal fibrils, divergent postciliary ribbons, and radial transverse ribbons (except in Subclass Peniculia); posterior kinetosome of somatic dikinetids similar to a monokinetid unit while anterior kinetosome bears only a tangential transverse ribbon; often microphagous, some macrophagous carnivores, others histophagous.

Barcode of Life Data Systems (BOLD) Stats
                                        

Specimen Records:	377	Public Records:	358
Specimens with Sequences:	365	Public Species:	66
Specimens with Barcodes:	358	Public BINs:	65
Species:	75
Species With Barcodes:	71

Access Published & Released Data: Download FASTA File

Collection Sites: world map showing specimen collection locations for Oligohymenophorea