Barthelona (Barcelona Es.) vulgaris Bernard et al., 2000. Cell outline is ovate. Cells are about 5 - 7 microns long and have two flagella inserting into a pocket. The cells have a groove from near the flagellar pocket to the posterior edge of the cell following the cell margin. The anterior flagellum is slightly longer than the cell, and the posterior flagellum is about 2.5 - 4 times cell length and sometimes lies partly in the groove. The cells usually attach to the substrate with the anterior flagellum and then draw food materials into the groove by using the posterior flagellum. Sometimes common in late cultures.
Barthelona vulgaris Bernard et al., 2000. Cells are 6 to 8 microns long, oval and flattened. Two flagella insert subapically and laterally, at about 60 degrees to each other. The anterior flagellum is one to two times the length of the body. The posteriorly-directed flagellum is three to five times the length of the body and slightly acronematic. A J-shaped cytoskeletal element originates from the flagellar insertion and continues posteriorly, loosely following the margin of the cell. This element results in the appearance of a flattened margin on one side and especially to the posterior portion of the cell. The nucleus is located anteriorly. The cells usually contain refractile granules. The cells can swim or, more rarely, glide slowly. The flagella beat with a gentle undulation in stationary cells.
