Zosterodasys numerosus ( Ozaki & Yagiu, 1941 ) Jankowski, 2007

Vďačný, Peter & Tirjaková, Eva, 2012, Taxonomic revision of the ciliate genus Zosterodasys Deroux, 1978 (Protista: Ciliophora: Synhymeniida), Zootaxa 3345, pp. 34-58 : 54-55

Zosterodasys numerosus ( Ozaki & Yagiu, 1941) Jankowski, 2007

( Fig. 8 J)

Chilodontopsis nemerosa – Wang et al. 2012: 46, 49, 51 [incorrect subsequent spelling and therefore unavailable according to the Articles 33.3 and 33.5 of the ICZN (1999)].

Chilodontopsis numerosa Ozaki & Yagiu, 1941: 173 , fig. 22.

Zosterodasys numerosa – Jankowski 2007: 729 (combining author).

Zosterodasys transverses – Gong et al. 2009: 341 [18S rRNA gene sequence of a South Korean population; incorrect subsequent spelling and therefore unavailable according to the Articles 33.3 and 33.5 of the ICZN (1999)]; Wang et al. 2012: 50, figs 5–10, 19–26 (morphological description of the South Korean population; very likely a misidentification).

Diagnosis. Size about 200–250 × 55–70 µm in vivo (?). Body shape narrowly obovate with left margin anteriorly indistinctly projecting. Macronucleus ellipsoidal. Many scattered contractile vacuoles. Marine.

Type locality. Under cyanobacterial layer in saltwater ditches near the Onomiti Channel, Japan.

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

Etymology. Not given in the original description. The Latin adjective numeros · us, - a, - um ([m, f, n]; numerous) obviously refers to the numerous contractile vacuoles.

Remarks. Jankowski (2007) combined C. numerosa with Zosterodasys , but did not change the species groupname to masculine gender. Thus, according to the Articles 30.2.4, 31.2 and 34.2 of the ICZN (1999), we mandatorily change numerosa to numerosus because Zosterodasys is masculine gender. We tentatively suggest to affiliating “ Z. transverses ” described by Wang et al. (2012) from a littoral rocky pond (30‰ salinity) near Incheon in South Korea with Z. numerosus . Both have a similar body size (160–400 µm in “ Z. transverses ” and 200–250 µm in Z. numerosus ), an oblong macronucleus and many scattered contractile vacuoles. Moreover, both live in East Asian saltwater environments. Thus, we recommend to neotypify Z. numerosus with the South Korean population because several important data (i.e., details of somatic and oral ciliary pattern, number of nematodesmal rods and ciliary rows as well as morphometry) and type material are not available from its original description by Ozaki & Yagiu (1941).

Figures

FIGURE 8. Var i ou s Zosterodasys species and their supposed synonyms from life (A), after Heidenhain’s haematoxylin stain (J), and after protargol impregnation (B – I). (A – F) Zosterodasys minutus, ventral view of a representative specimen (A), variability of body shape and size as well as of the nuclear apparatus (B – D), ventral (E) and dorsal (F) view of ciliary pattern and nuclear apparatus. Note the S-shaped pattern of the synhymenium which completely encircles the cell (C – F). From Gong et al. (2007). (G, H) Zosterodasys minor, total ventral view of ciliary pattern (G) and dorsal view of ciliary pattern in anterior body region (H). From Alekperov et al. (2007 / 8). Reprinted by permission from “ Protistology ”, 2007 / 2008, 5 (2 / 3): 101 – 130. (I) Chilodontopsis vorax (?), total ventral view of ciliary pattern and nuclear apparatus. From Burkovsky (1970 a). (J) Zosterodasys numerosus, ventral view of a representative specimen showing many scattered contractile vacuoles. From Ozaki & Yagiu (1941).