Developayella elegans Tong, 1995. Cell outline is oval. Cells are 3.5 to 7 microns long and with two flagella emerging from a depression in the right anterior part of the ventral side of the cell. The anterior flagellum is about 1.3 times the length of the cell and the posterior flagellum is about 1.5 to 1.7 times the length of the cell. The cells attach to the substrate by means of the posterior flagellum. In attached cells the anterior flagellum is held in a curve and beats slowly up and down, and the posterior flagellum beats rapidly with a shallow excursion. The cells move by swimming. Food ingestion takes place near the posterior end of the ventral groove. When feeding, the bacterium adheres to the body and then is drawn into the body.
