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Trochiliopsis opaca (Pennard 1922), a colorless microthoracid ciliate synonymous with Trichopelma opaca (Kahl 1931). This genus contains one other species, T. australis. The rigid body of T. opaca is ovoid and strongly laterally compressed, the anterior curving ventrally into a small beak (seen in accompanying images). The right and left surfaces are ribbed longitudinally. This image is of the sparsely ciliated left surface (sometimes designated as dorsal). Two posterior cilia are seen. There is a kinety curving toward the ventral surface and a cluster of cilia near the oral aperture. Two of the large obliquely oriented extrusomes are seen in the central anterior half of the cell. T. opaca is bactivorous. From putrefying freshwater specimen containing decomposing filamentous algae collected near Boise, Idaho. Differential interference contrast.
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Trochiliopsis opaca (Pennard 1922), a colorless microthoracid ciliate synonymous with Trichopelma opaca (Kahl 1931). This genus contains one other species, T. australis. The rigid body of T. opaca is ovoid and strongly laterally compressed, the anterior curving ventrally into a small beak (seen in here). The right and left surfaces are ribbed longitudinally. This image is of the right surface (sometimes designated as ventral) which bears most of the somatic and oral ciliature. The left anterior oral aperture is seen here. There is a cyrtos which is visible only with silver impregnation techniques. The cyrtos of T. australis is visible in vivo. The central contractile vacuole has a prominent duct connecting it with a pellicular pore through which it empties at the posterior end of the paraoral kinety (the duct is seen in this image extending from the left lower quadrant of the contractile vacuole). The round macronucleus is central and very inconspicuous. T. Opaca is bactivorous. From putrefying freshwater specimen containing decomposing filamentous algae collected near Boise, Idaho. Differential interference contrast.
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Trochiliopsis opaca (Pennard 1922), a colorless microthoracid ciliate synonymous with Trichopelma opaca (Kahl 1931). This genus contains one other species, T. australis. The rigid body of T. opaca is ovoid and strongly laterally compressed, the anterior curving ventrally into a small beak (seen in here). The right and left surfaces are ribbed longitudinally. This image is of the right surface (sometimes designated as ventral) which bears most of the somatic and oral ciliature (seen in this image). The left anterior oral aperture is seen here. Characteristic extrusomes are seen along the anterior curved cell margin. There is a cyrtos which is visible only with silver impregnation techniques. The cyrtos of T. australis is visible in vivo. The contractile vacuole is central. The round macronucleus is central and very inconspicuous. T. Opaca is bactivorous. From putrefying freshwater specimen containing decomposing filamentous algae collected near Boise, Idaho. Differential interference contrast.
