Pseudovorticella bidulphiae (Stiller, 1939) Ji, Sun, Song & Warren, 2009

(Fig. 4; Table 1)

Pseudovorticella bidulphiae is characterized by the following characteristics: cell body measuring 30–40 × 35–40 µm (n=4) in vivo, two ventrally located contractile vacuoles, J-shaped macronucleus, 24–28 silverlines lying between peristome and trochal band, 9–11 silverlines lying between trochal band and scopula, P3 composed of only two ciliary rows with row 1 noticeably shorter than row 2 at its adstomal end (Song et al. 2009). Here, we supply its illustrations of morphology (Fig. 4) and a brief comparison with related species:

At low magnifications, Pseudovorticella pseudocampanula Foissner, 1979 (Fig. 4 E), P. sauwaldensis Foissner & Schiffmann, 1979 (Fig. 4 F) and Vorticella venusta Nenninger, 1948 (Fig. 4 G) resemble P. bidulphiae in shape and size of the cell body. However, all three of these species live in fresh water (vs. marine habitat in P. bidulphiae) and a single contractile vacuole (vs. 2 in P. bidulphiae) (Foissner 1979; Foissner & Schiffmann 1979).