Rhynchomonas nasuta Klebs 1893 (Fig. 2k)

Observation: Cells are 3.5 to 6 µm long and flattened. The cells are flexible with a bulbous motile snout. The snout, which contains a mouth, beats slowly. The anterior flagellum lies alongside the snout and is hard to see, and the trailing flagellum is 2 to 2.7 times the cell length, and acronematic. The cells consume attached bacteria and cells move by gliding. Commonly observed.

Remarks: This species is one of the most widely reported taxa from diverse sites worldwide (Patterson and Lee 2000). It can be distinguished from other small gliding species by the bulbous snout.