Sinistermonas Lee nov. gen.

Diagnosis: Biflagellated colourless protists of unknown affinities. Body rigid and flattened with ventral depression subapically. With two flagella, both inserting into ventral depression. The anterior flagellum is directed anterior-laterally to the left, the other trailing. Move by gliding.

Type species: Sinistermonas sinistrorsus nov. spec.

Etymology: the name refers ‘to the left’.