The cell, which bears a single anterior flagellum and a collar of 20-25 tentacles, is lodged in the posterior chamber of the lorica. About 15 longitudinal costae run from the base of the posterior chamber to the top of the anterior chamber. Four transverse costae encircle the posterior chamber and about three double costae encircle the anterior chamber. Anteriorly the longitudinal costae curve inwards. Lorica 14.5-15.5 microns long.