Limnofila borokensis Cavalier-Smith and Bass, 2009

Diagnosis: Three distinct forms in addition to smooth spherical cysts; stationary feeding stage with central cell body and 2-13 radiating, extremely slender branching filopodia (0.15 µm thick) with extrusomes along their length (3-4 x cell body); creeping stage polarised, with lobopodia at the leading edge and sparse trailing filopodia; brief non-feeding flagellate phase with no pseudopodia and very few extrusomes has a short motile laterally beating anterior cilium and 13-15 µm trailing cilia; several contractile vacuoles in cell body. Pseudopodia generally non-anastomosing, but rare cases reported. The rarity of fusion makes it misleading to call them reticulopodia.

Dimensions: Cysts 2.5-3.5 µm diameter; cell body 5-7 µm; flagellate phase 13-15 µm x 3-4 µm.