Zosterodasys serrani Fernandez-Leborans, 1990

Vďačný, Peter & Tirjaková, Eva, 2012, Taxonomic revision of the ciliate genus Zosterodasys Deroux, 1978 (Protista: Ciliophora: Synhymeniida), Zootaxa 3345, pp. 34-58 : 55

Zosterodasys serrani Fernandez-Leborans, 1990

( Figs 9 C, D, H)

Zosterodasys serrani Fernandez-Leborans, 1990: 90 , figs 1–12; Fernandez-Leborans & Alekperov 1996: 15, fig. 17 (taxonomic revision); Jankowski 2007: 729.

Diagnosis. Size about 133–138 × 66–69 µm in fixed specimens. Body shape ellipsoidal. Macronucleus roundish with a single globular micronucleus. About 50 ciliary rows: 29–36 ventral and 15–19 dorsal. Synhymenium restricted to ventral body side. On average 22 (20–24) nematodesmal rods. Freshwater.

Type locality. La Jarosa Reservoir, 60 km NW of Madrid, Spain.

Type material. Deposition of type material not mentioned in the original publication.

Etymology. Not given in the original description. Very likely named in honour of the Spanish protozoologist, Susana Serrano.

Remarks. Fernandez-Leborans (1990) investigated mainly fixed and stained material, thus redescription based on detailed live observation is recommended. Zosterodasys serrani is outstanding among congeners in having a synhymenium restricted only to the ventral body side (vs. extending also onto the dorsal side), thus the dorsal ciliary rows are uninterrupted. Therefore, Z. serrani very likely belongs to a different genus.

Figures

FIGURE 9. Va ri ou s Zosterodasys species and their supposed synonyms from life (E), after Heidenhain’s haematoxylin stain (A), after silver carbonate (C, D, F – H) and protargol (B) impregnation. (A) Zosterodasys hisioensis, ventral view of a representative specimen. Length 200 µm. From Ozaki & Yagiu (1941). (B) Zosterodasys texensis, total ventral view of ciliary pattern and nuclear apparatus. From Alekperov et al. (2007 / 8). Reprinted by permission from “ Protistology ”, 2007 / 2008, 5 (2 / 3): 101 – 130. (C, D, H) Zosterodasys serrani, frontal view of oral opening (C) and ventral (D) as well as dorsal (H) view of ciliary pattern and nuclear apparatus. Arrowheads denote synhymenium which is restricted to the ventral body side (D). Length not provided. From Fernandez-Leborans (1990). (E – G) Zosterodasys henarensis, ventral view of a representative specimen (E) and schematized ventral (G) as well as dorsal (F) view of ciliary pattern and nuclear apparatus. Arrowheads denote proximal and distal end of synhymenium that almost completely encircles the body. Length not provided. From Sola et al. (1990).