Drawing

Description:

Apheloecion glacialis Thomsen, Garrison and Kosman, 1997. Cells are solitary. The cell (5-9 x 3-5 microns) tapers posteriorly and has its maximum diameter at the level of the single transverse costa. The single anterior flagellum (20-30 microns) is surrounded by a well-developed ring of tentacles (4-5 microns long). The lorica is simple, consisting of a total of 19 costal strips arranged to form a lorica chamber with 6 anterior projections (6-6.5 microns long). There is a simple pedicel about 5 microns long. The costal strips that form the projections and the pedicel have finely pointed tips. In the living cell, the anterior projections are arranged almost perpendicular to the longitudinal axis of the lorica chamber. The lorica chamber consists of 6 longitudinal costal strips (6-7 microns long) surmounted by a single transverse costa (diameter about 5 microns) similarly composed of 6 costal strips (about 3 microns long). The joins between anterior transverse and longitudinal costal strips are E-joins. Tectiform division.