(hype-err-a-me-ba) a genus of flagellates with only a couple of species, very similar to the unicellular forms of the myxomycete slime moulds - with which it probably has affinities. Flagellated cells with one or two flagella, if two, one long one short. One long flagellum evident in this image. The cell body is clearly amoeboid. May also have an anterior projection. Phase contrast.