Description of Setonophrys communis
provided by BioPedia
Loricate peritrich ciliate, lorica hemispheroidal, subcircular or suboval in dorsal view, with moderately to heavily thickened rim. Lips of aperture tall, located close to anterior margin of lorica. Anterior lip of lorica aperture slightly to moderately arched. Shape of lip is asymmetrical, apex of curvature of edge occurring slightly to left of center of lip. Edge of anterior lip varies. Edge lacks spines, has one spine near right end of lip, or has a spine near each end of lip. Spine length arising from edge of anterior lip varies. Posterior lip of lorica aperture as described for genus. Macronucleus elongate, located in approximate center of body. Medial portion of macronucleus extremely slender, straight or slightly curved, parallel to transverse axis of body or slanting posteriad from left to right at slight angle to transverse axis; ends of macronucleus much thicker than medial portion, curved anteriad away from medial portion. Micronucleus ovoid, usually located near right end of macronucleus but rarely near centre and never left end.
