Metacineta longipes (Mereschkowsky, 1877)

Fig. 3 e.

The cell is spherical or somewhat elongate, covered by stylotheca with very long stalk-like protuberance. Macronucleus is ovoid, centrally located. Cell body clamped to the stylotheca near the apical aperture. The apical aperture of stylotheca has 6 or 7 edges. Tentacles are long, clavate and arranged in 6 or 7 radial rows placed between edges of stylotheca (Rieder, 1985). Reproduction by semi-circumvaginative budding with generation of tomit in the partial invagination of trophont cortex.

Dimensions: body diameter 25–37; diameter of macronucleus 10–15; length of tentacles 30–50; stylotheca length 175–185; stylotheca width 40–50; stalk-like protuberance length 130–200. Previous measurements: body diameter 246; length (with stalk) 2,040.

Material examined. Found as epibiont of: Nepa cinerea . Belarus. River Ubort’ near village Borovoe, 13.08.1983.

Additional records. On Lemna Linnaeus, Ceratophyllum Linnaeus (Matthes et al. 1988) .