New Contribution to the Morphology and Taxonomy of Four Marine Hypotrichous Ciliates from Qingdao, China (Protozoa: Ciliophora)

Wei-Bo Song ； Norbert Wilbert ； Alan Warren

《Acta Protozoologica》 41卷2期 (2002/06) Pp. 145-162

並列摘要

The morphology and infraciliature of four marine hypotrichous ciliates, Bakuella agamalievi Borror & Wicklow, 1983, Pseudokeronopsis flavicans (Kahl, 1932) Borror & Wicklow, 1983, Holosticha heterofoissneri Hu & Song, 2001 and Cyrtohymena marina (Kahl, 1932), collected from the coastal water of Qingdao (Tsingtao), China are investigated and redescribed. Pseudokeronopsis flavicans (Kahl, 1932) is characterized by: yellow-coloured, flexible body, in vivo 200-300×40-55 µm that is slender ribbon-shape with a narrowed caudal portion; a bicorona comprising 5-9 pairs of frontal cirri; one buccal, 2 frontoterminal and 3-6 transverse cirri; midventral rows consisting of about 25-40 pairs of cirri which terminate caudally about 15 µm above the inconspicuous transverse cirri; 46-66 adoral membranelles; on average, 52 left and 60 right marginal cirri; 3-4 dorsal kineties; numerous macronuclear segments; colourless, sub-pellicular blood-cellshape granules distributed over whole cell and bright yellow-brownish cortical granules grouped around cilia or cirri; one contractile vacuole lying in anterior 2/5 of body. The diagnosis for Bakuella agamalievi is as follows: 100-150 x 30-50 µm in vivo with elongated body shape; about 30 adoral membranelles; on average, 33 left and 43 right marginal cirri; 4-7 frontoterminal, 4 frontal, one buccal and 4-7 transverse cirri; 9-13 pairs of midventral cirri distributed mostly in frontal area; 3-6 ventral rows with 3-5 cirri each; consistently 3 dorsal kineties; numerous macronuclei; cortical granules grouped in short rows; one contractile vacuole in anterior 1/3 of body. Holosticha heterofoissneri is characterized by; slender, fusiform body, 110-150×30-60 µm in vivo; 14-21 macronuclear segments forming an elongate U-shape; single, post-equatorial contractile vacuole; small, sparsely distributed cortical granules; 50 adoral membranelles; one anteriorly positioned buccal cirrus; 4 frontal, 2 frontoterminal and 12-17 transverse cirri; midventral rows comprising about 13 pairs of cirri, which extend almost to caudal end; 5 dorsal kineties. The little-known Cyrtohymena marina is characterized by: body elongate oval to long elliptical shape, 100-150×30-50 µm in vivo; one pre-equatorially positioned contractile vacuole; 32-42 adoral membranelles; consistently 8 frontal, 5 ventral, 5 transverse and 2 to 3 caudal cirri; 17-21 left and 19-25 right marginal cirri; 2 to 3 caudal cirri; 9-11 dorsal kineties; 2 macro- and 2-5 micronuclei; 4 complete, and one fragment-like, dorsal kineties; cortical granules fine, inconspicuous, and very sparsely distributed.

並列關鍵字

Bakuella agamalievi ； Ciliophora ； Cyrtohymena marina ； Holosticha heterofoissneri ； Hypotrichida ； marine ciliate ； morphology and infraciliature ； Pseudokeronopsis flavicans