Orthodonella shenae Song and Wilbert, 2002

Wilbert, Norbert & Song, Weibo, 2005, New contributions to the marine benthic ciliates from the Antarctic area, including description of seven new species (Protozoa, Ciliophora), Journal of Natural History 39 (13), pp. 935-973 : 938

Orthodonella shenae Song and Wilbert, 2002

( Figure 2E–G ; Table II)

This species was newly established by the present authors (Song and Wilbert 2002), but unfortunately, was assigned incorrectly to the order Cyrtophorida ( Corliss 1979) .

The current population resembles that previously described by Song and Wilbert (2002) very well except that it exhibits more variability in size and shape of cells: from 52 to 126 M m in length after impregnation (Table II). In addition, two pores for each of two contractile vacuoles are found on the dorsal side in at least two specimens ( Figure 2F , arrows). As an additional contribution, we also supply here the statistical data that was previously lacking (Table II).

Order CYRTOPHORIDA Fauré-Fremiet in Corliss, 1956

Figures

Figure 2. (A–D) Dysteria parovalis nov. spec. and (E–G) Orthodonella shenae from life (A, B) and after protargol impregnation (C–G). (A) Lateral view of a typical specimen; (B) ventral view, to show the flattened body shape; (C) somatic infraciliature, arrowheads mark the shortened ventral kineties; arrow indicates the fragment-like left kineties, while double-arrowheads mark the argentophilic structure; (D) left view, to show the general appearance of ciliature and nuclear apparatus; arrow marks the oral structure; double-arrowheads indicate the posterior end of cytopharyngeal fibres; arrowhead points to the terminal fragment; (E) ventral view, to show a cell full of large diatoms, arrow marks the synhymenium; (F) dorsal view, to show the pores of contractile vacuoles (arrows); (G) to demonstrate different sizes of cells after fixation. Scale bars: 50 Mm (A, E); 40 Mm (D); 70 Mm (G).