Zosterodasys

Vďačný, Peter & Tirjaková, Eva, 2012, Taxonomic revision of the ciliate genus Zosterodasys Deroux, 1978 (Protista: Ciliophora: Synhymeniida), Zootaxa 3345, pp. 34-58 : 41

Key to Zosterodasys species

( Figs 2 and 3 )

1 In marine or brackish environments (e.g., sea, estuaries or sea ice)............................................. 2

- In freshwater environments (e.g., puddles, benthos and periphyton of ponds or rivers)............................. 8 2 Posterior body end tail-like.................................................................... Z. caudatus - Posterior end tapering, narrowly or broadly rounded........................................................ 3 3 Three contractile vacuoles arranged in a row near right body margin..................................... Z. acutus - Other contractile vacuole pattern....................................................................... 4 4 Usually 3 conspicuously large micronuclei (4–10 µm across); synhymenium completely encircles body; ventral kineties form a

Figures

FIGURE 2. Illustrated key to Zosterodasys species isolated from marine and brackish habitats. For instructions how to use the key, see Material and methods. All size ranges refer to live specimens.

FIGURE 3. Illustrated key to Zosterodasys species isolated from freshwater habitats. For instructions how to use the key, see Material and methods. All size ranges refer to live specimens, except for Z. henarensis and Z. serrani, in which data are available only for fixed cells.