Tripartiella macrosoma Basson & Van As , 1987,

Tang, Fahui, Zhao, Yuanjun & Liu, Chunning, 2013, First records of three Tripartiella species (Ciliophora, Oligohymenophora, Peritrichida) from freshwater fishes along Yangtze River in China, Zootaxa 3681 (2), pp. 169-174: 172-173

publication ID

http://dx.doi.org/10.11646/zootaxa.3681.2.6

publication LSID

lsid:zoobank.org:pub:C6752FC1-4A02-4DA6-8798-3B864561C21D

persistent identifier

http://treatment.plazi.org/id/653B5414-FF8E-FF9C-75F2-B659FDC7FC70

treatment provided by

Plazi

scientific name

Tripartiella macrosoma Basson & Van As , 1987
status

 

Tripartiella macrosoma Basson & Van As, 1987 

Host: Rhinogobio typus 

Locality: Qu County, Sichuan Site: Gills

Date of sampling: April, 2012 Description ( Figs. 5, 6View FIGURES 1 – 6, 9View FIGURES 7 – 9). The following morphological description was based on 20 specimens measured (n = 20). Small freshwate r Tripartiella  with a compressed body, diameter 19.0–26.0 (23.1 ± 1.6); adhesive disc 14.0– 23.0 (18.0 ± 2.3); width of border membrane 1.5 –3.0 (1.9 ± 0.4); diameter of denticle ring 8.0–10.0 (9.3 ± 1.1); number of denticles 23–27; number of radial pins per denticle usually 4–5; span of denticle 5.5 –7.0 (6.4 ± 0.5); length of denticle 2.0– 2.5 (2.1 ± 0.1); blade long-strip or long-spoon shaped, length 4.0– 5.5 (4.6 ± 0.4), and pointed backward; distal blade surface rounded, not in parallel with border membrane, and much higher than the tangent point; anterior and posterior surfaces rough, not parallel with each other; anterior surface blade apophysis indistinct, just touching the Y + 1 axis; blade apophysis dominant and extending past Y + 1 axis. Central part relatively thin with point fitting tightly into preceding denticle. Shapes of the central part above and below the Xaxis not symmetrical and 0.5–1.5 (0.9 ± 0.2) in width. Ray connection barely distinguishable from the ray. Ray slim, and short, 1 –2.0 (1.7 ± 0.2) in length, ray apophysis invisible; ratio between denticle above and below X axis much more than two. Macronucleus C-shaped, external diameter 17.5–23.5 (19.8 ± 1.5) and internal diameter 12.5 –19.0 (15.8 ± 1.6). Micronucleus oval, 1.0–2.0 (1.4 ± 0.4) in length and 0.5–1.5 (0.8 ± 0.2) in width, situated in Y position. Adoral ciliary spiral turns about 190 °– 230 ° around peristomial disc.

Remarks. Tripartiella macrosoma  was originally described from gills of Barbus eutaenia  in Klein Letaba River of the Olifants River system, South Africa ( Basson & Van As, 1987). Later, it was first reported from gills of freshwater fishes, Hypophthalmichthys molitrix  , Ctenopharyngodon idella  and Pelteobagrus vachellii  in Chongqing and Ningbo area of China ( Tao & Zhao, 2006; Yu et al., 2011). The present population was isolated from gills of another freshwater fish, Rhinogobio typus  , in Sichuan area of China. The morphology of adhesive disc of the present population is in agreement with the original description and morphometric data are also well within the range of the original description. Rhinogobio typus  is established as the new host record for Tripartiella macrosoma  in the present research work.