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Euglenida: Heteronematales

Heteronema acus

Genus: Like Peranema, but second flagellum free, trailing, 1/2 body length; plastic (How to know the protozoa, 1979). Both flagella emerge from canal; unequal in length and thickness; longer thicker one directed anteriorly during swimming; shorter trailing posteriorly, lying free from cell; colourless; phagotrophic; ingestion organelle composed of 2 rods; no eyespot; cell body plastic, solitary, elongated, tapering, not flattened; fresh and salt water (Illustrated Guide, 1985).

Heteronema acus Dujardin, cell body 72 μm long, 12 μm wide, anterior flagellum 61 μm long, recurrent flagellum 30 μm long, Hiroshima Pref., Japan, September 1998 by Y. Tsukii

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