Updating the Ciliate Genus Chlamydodon Ehrenberg, 1835, with Redescriptions of Three Species (Ciliophora: Cyrtophorida)

Jun Gong ； Wei-Bo Song ； Alan Warren

《Acta Protozoologica》 44卷1期 (2005/03) Pp. 19-32

並列摘要

Summary. The morphology and infraciliature of three marine cyrtophorid ciliates, Chlamydodon obliquus Kahl, 1931, C. mnemosyne Ehrenberg, 1835 and C. triquetrus (Müller, 1786), collected from coastal waters near Qingdao (Tsingtao), China, were investigated in vivo and using protargol impregnation. Based on the previous and current studies, the definition for the genus Chlamydodon is updated: chilodonellids with a cross-striated band around the periphery of the somatic field; rightmost kineties extending dorso-apically and bending to the left, making a conspicuous suture with left kineties; one preoral and two circumoral kineties obliquely arranged; equatorial fragment with loosely spaced kinetosomes; several to many terminal fragments. A revised diagnosis for the little known species C. obliquus is suggested: large-sized Chlamydodon, about 120-180×50-120 μm in vivo, body ellipsoid to triangular in outline; cross-striated band continuous, largest portion of which runs along cell margin, anterior region crossing onto dorsal surface; about 37 right, 4 postoral and 27 left kineties; 11-14 nematodesmal rods; about 7 terminal fragments on dorsal side; ca. 10 contractile vacuoles irregularly distributed; marine habitat. Improved diagnoses for C. mnemosyne and C. triquetrus are also supplied. Comparisons between congeners demonstrate that C. exocellatus Ozaki et Yagiu, 1941 and C. kasymovi Aliev, 1987 are synonyms of C. obliquus and C. triquetrus, respectively; C. pedarius Kaneda, 1953 and C. apsheronica Aliev, 1987, should be conspecific with the type species C. mnemosyne. Based on the data of morphology and infraciliature, an updated key to 5 Chlamydodon species is supplied.

並列關鍵字

Chlamydodon ； Cyrtophorida ； infraciliature ； key to Chlamydodon ； marine ciliate ； morphology