Abstract
The morphology and ciliary pattern of a new marine oligotrichous ciliate, Strombidium wilberti nov. spec., collected from the littoral area off Qingdao, North China, are described from live observations and after protargol impregnation. This new species is characterized by: about 45–60×35–50 µm in vivo with truncated obconical body shape and conspicuous distended cell surface which covers the posterior half of the cell; buccal cavity extending posteriorly to about one‐third of body length; about eight buccal and 15 collar membranelles; girdle kinety completely closed, consisting of ca 60 dikinetids; ventral kinety conspicuously long with about 30 densely packed dikinetids, which extends anteriorly to girdle area; extrusomes about 20 µm long, grouped in rows and arranged anterior to girdle kinety; single globular macronucleus. Related nominal congeners are compared and discussed. The Antarctic morphotype described by Petz et al. (1995) as Strombidium emergens (Leegaard, 1915) Kahl, 1932 is not conspecific with the original form and is hence recognized as a new member of this genus, Strombidium petzi nov. spec. The diagnosis for this new organism: large marine Strombidium ca 95–110×60–65 µm in vivo with elongate elliptical body shape and conspicuously shallow oral cavity. Girdle kinety continuous on ventral side with ca 100 dikinetids; ventral kinety extending from posterior area almost to girdle kinety, consisting of more than 20 dikinetids; four to five buccal and 14–15 collar membranelles. Macronucleus oval in shape; one subequatorial girdle of extrusomes.
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