[2] Marsupiomonas pelliculata is a single-celled organism with one emergent flagellum.

Cells are rounded and flattened, with the flagellum emerging out of a pit along the edge.

[1] The flagellum is covered in stiff hairs.

On the side of the cell opposite the flagellum, there is a single eyespot.

[3] Marsupiomonas was first isolated from a salt marsh in the Tamar Estuary, Cornwall, England, and can tolerate a wide range of salinities.