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Image of ventral surface showing the anterior (to the right) zone of membranelles, and cirri around more or less the entire circumference of the cell. Phase contrast image.
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Histriculus (his-trick-you-lus) is a hypotrich ciliate, which can be distinguished by the distribution of the cirri - the aggregates of cilia used in locomotion - on the ventral side. There is an anterior (top of image) array of membranelles (aggregates of cilia) which are used to collect food - typically algae. Differential interference contrast. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.
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The identity of this organism is unconfirmed. This image is focussed just below the ventral surface. There seem to be 2 rows of marginal cirri - a distinguished feature for Holosticha, and there is a collection of transverse cirri at the back. The inner region of the Adoral Zone of Membranelles that arcs around the front of the cell is quite evident - but is larger than is usual for the genus Holosticha. The relationships between Holosticha and close relatives are subject to debate. Nomarski optics.
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Histriculus (his-trick-you-lus) is a hypotrich ciliate, which can be distinguished by the distribution of the cirri - the aggregates of cilia used in locomotion - on the ventral side. There is an anterior (top of image) array of membranelles (aggregates of cilia) which are used to collect food - typically algae. Differential interference contrast. Material from Nymph Creek and Nymph Lake, thermal sites within Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.
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Uroleptus (you-row-lep-tuss) an elongate hypotrich ciliate usually associated with sands and other sediments. With a curt adoral zone of membranelles at the anterior end, and a very long thin body with numerous cirri (clusters of cilia) with which the cell moves. Contractile. Phase contrast micrograph.
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Tachysoma, a hypotrich ciliate. The body is relatively elongate, dorsoventrally flattened and rounded anteriorly and posteriorly. The adoral zone of membranelles is limited to about one quarter of the body length. The three long frontal cirri are seen here. There are five characteristic long transverse cirri. Caudal cirri are absent. The right and left marginal cirral files do not join posteriorly. There are two spherical macronuclei flanking a dense relatively large micronucleus (seen well in this image). Two small refractile lipid globules, considered characteristic (termed Fettkorn by Foissner), are clearly seen in the anterior and posterior quarters of the cell in this image. The contractile vacuole (not seen in this image) is located on the left in the mid portion of the cell. Tachysoma feeds on bacteria, green algae and diatoms. From freshwater pond near Boise, Idaho. Brightfield illumination.
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Uroleptus. Cell observed in sandy and muddy marine sediments in the vicinity of Broome, Western Australia in September 2003. This work was supported by the Australian Biological Resources Study.
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Originally described by Ehrenberg under the name Oxytricha eurystoma.
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Dorsal infraciliature of Uroleptus piscis (MUELLER,1773) EHRENBERG,1831. 1-5= Dorsal bristle kineties. Collected from a eutrophic freshwater pond in Boise,Idaho.Stained by the Protargol A technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.
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Ventral view of Uroleptus piscis (MUELLER,1773) EHRENBERG,1831.Collected from a eutrophic freshwater pond in Boise,Idaho.DIC.
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Stylonychia, a widely distributed hypotrich ciliate. The dorsoventrally flattened body is elongate and broadly rounded anteriorly, narrowing posteriorly. The adoral zone of membranelles is strongly developed and rests on an anteriorly protruding collar. The two rows of marginal cirri are slightly out of the focal plane in this image. They do not meet posteriorly. The three characteristic caudal cirri are seen here. There are short dorsal cilia (not seen here). Two ellipsoid macronuclei are visible in this image. One of two small spherical micronuclei is seen at the inferior margin of the posterior macronucleus. This individual has been feeding on diatoms and green algae. From freshwater pond near Boise, Idaho. Brightfield illumination.
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Ventral infraciliature of Uroleptus piscis (MUELLER, 1773) EHRENBERG, 1831.Collected from a eutrophic freshwater pond in Boise,Idaho June 2008.Stained by the Protargol A technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.
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Inflexible, elongate, oval, dorso-ventrally flattened body with a large and powerful AZM. There are rows of marginal cirri that are not continuous posteriorly. Three long, strong and prominent caudal cirri help to distinguish members of this genus.
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Ventral view of Uroleptus piscis (MUELLER, 1773) EHRENBERG, 1831.FC=frontal cirrus.LMC=left marginal cirral row.RMC=right marginal cirral row.VCR=zig-zag midventral cirral row.Collected from a eutrophic freshwater pond in Boise,Idaho June 2008.DIC.
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Ventral view of Uroleptus piscis (MUELLER, 1773) EHRENBERG, 1831.CV=contractile vacuole.Collected from a eutrophic freshwater pond in Boise,Idaho June 2008.Brightfield.
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Originally described by Ehrenberg under the name Stylonychia silurus
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Ventral infraciliature of Stylonychia pustulata (MUELLER, 1786) EHRENBERG, 1835. Collected from a eutrophic freshwater pond in Boise, Idaho. June 2008. Protargol A (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.