Comparative Studies on Two Closely Related Species Uronemella filificum (Kahl, 1931) and Uronema elegans Maupas, 1883 with Redescription of Paranophrys marina Thompson et Berger, 1965 (Ciliophora: Scuticociliatida) from China Seas

Wei-Bo Song ； Hong-Gang Ma ； Mei Wang ； Ming-Zhuang Zhu

《Acta Protozoologica》 41卷3期 (2002/09) Pp. 263-278

並列摘要

The living morphology, infraciliature and silverline system of 3 known marine scuticociliates, Uronemella filificum (Kahl, 1931) Song et Wilbert, 2002 (formerly Uronema filificum Kahl, 1931), Uronema elegans Maupas, 1883 and Paranophrys marina Thompson et Berger, 1965 are reinvestigated and described. Based on the populations isolated from China seas, improved diagnoses for all three species are supplied. Diagnosis for Paranophrys marina: marine slender Paranophrys in vivo ca 35-45×10-15 µm with sharp apical and narrowed posterior end; membranelle 1 two-rowed and dominant long, almost conjoint to membranelle 2; scutica with several singled basal bodies arranged in line; 10 densely ciliated somatic kineties; contractile vacuole large and caudally positioned, opens at the posterior end of the somatic kinety 2; one oval macro- and one small micronucleus. The well-known Uronemella filificum can be recognized by the following characters: marine pear-shaped Uronemella in vivo ca 25-45×12-30 µm with conspicuously large apical plate and typically thigmotactic living behaviour; membranelle 1 one- or partly two-rowed, only slightly away from apical area; 16-23 somatic kineties with densely packed cilia; contractile vacuole pore at posterior end of somatic kinety 2; one macro- and one micronucleus; extrusomes present. Uronema elegans is characterized by cylindrical or kidney-like body shape in vivo ca 30-50×20-30 µm with small apical plate and conspicuously reticulate pellicle ridges; membranelle 1 one- or partly two-rowed, which is considerably away from the apical area; 23-26 somatic kineties; contractile vacuole positioned sub-caudally near ventral margin with its pore at posterior end of somatic kinety 2; one macro- and one micronucleus; extrusomes bar-like, densely distributed.

並列關鍵字

marine ciliates ； morphology ； Paranophrys marina ； Scuticociliatida ； taxonomy ； Uronema elegans ； Uronemella filificum