Drawing

Description:

Stephanoeca elegans (Norris, 1965) Throndsen, 1974. Cells spherical to ovoid, with collar and flagellum. Cells located in base of lorica composed primarily of 18 longitudinal costae. Costae converging at base of lorica, forming a narrow basal area that encloses cell. One or two transverse costae encircling lorica at anterior end of cell. Longitudinal costae abruptly diverging in area above transversecostae forming a broad chamber that gradually narrows to the orifice. A single transverse costa encircles the opening. Cell diameter 3-3.5 microns, lorica diameter at base 4-5 microns, length of lorica base 4-6.5 microns, length of anterior lorica chamber 8-11 microns, widest diameter of anterior lorica chamber 8-8.5 microns, orifice diameter 3.5-6.5 microns