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

Ji, Daode, Shin, Mann Kyoon, Choi, Joong Ki, Clamp, John C., Al-Rasheid, Khaled A. S. & Song, Weibo, 2011, Redescriptions of five species of marine peritrichs, Zoothamnium plumula, Zoothamnium nii, Zoothamnium wang, Pseudovorticella bidulphiae, and Pseudovorticella marina (Protista, Ciliophora), Zootaxa 2930, pp. 47-59 : 57

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).

Figures

FIGURE 4. Morphology of Pseudovorticella bidulphiae (A – D, H – M) and similar species (E – G). A, I. General view of a typical cell. B. Variations in shape of the cell body. C, D. After Stiller (1939). E. Pseudovorticella pseudocampanula (after Foissner 1979). F. Pseudovorticella sauwaldensis (from Foissner and Schiffmann, 1979). G. Vorticella venusta (from Warren 1986). H. Oral infraciliature, arrow marks the epistomial membrane. J. Pellicular striations. K. Detail of stalk. L. Protargol-stained specimen showing infundibular polykineties. M. General view of silverline system, arrows mark the trochal band. Abbreviations: G, germinal kinety; H, plokinety; P 1 – 3, infundibular polykinety 1 – 3; Po, polykinety. Scale bars: 20 Μm (Figs. A, E – G), 50 Μm (Figs. C, I).