Xu, K.; Song, W. (1998). A morphological study on a new species of gill parasitic ciliate, Urceolaria cheni nov. spec. from the clam Scapharca subcrenata. Journal of fishery sciences of China. 5(3), 13-17.

341341

Xu, K.; Song, W.

1998

5(3), 13-17

Publication

A new marine ciliate Urceolaria cheni nov .spec .from the gills of a kind of marine mollusc Scapharca subcrena off Shandong coast was morphologically studied based on living observation and silver staining .Morphological comparison of the new species with the known species was also conducted and discussed. Diagnosis:Marine Orreolada invivo about 38-45#mu#m in body diameter, body asymmetry in lateral view; body height:diameter about 1:1;paratizing on the gills of marine mollusc S. subcrenata; number of denticles 12-15;number of radial pins 8-9 per denticle;adoral ciliary spiral turning about 450°;haplokinety consisting of 2 rows of kinetosomes, polykinety with 3 rows; macronucleus elongated kidney-shaped, length 28.0-35 .0(32 .7±2 .4)#mu# m, width 13.0-29.0(19 .1±5.6)#mu#m; micronucleus spherical. Host and site:Gills of marine mollusc S. subcrenata off Shandong coast. Remarks: The new species can be distinguished from the related species of Urceolaria by smaller Body diameter and height, less denticle number and body shape .In comparison with the known Urceolaria species with elongated kidney-shaped or ovoid macronucleus, 3 species are similar to the new species:U. elorgata, U. paradoxa and U. symptae. However, the new species differs from U. elongata in the body diameter(27-30#mu#m vs .44-55#mu# m) and body height(27-30 #mu# m vs .77-110 #mu#m), from U. paradoxa in habitat(marine water vs .terrestrial) and body diameter(27-30 #mu#m vs .70-80 #mu#m), and from U. synaptae in the number of denticles(12-15 vs.30-36).

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