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Ribadelago de Franco, Castille and Leon, Spain
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Hervias, La Rioja, Spain
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Ribadelago, Castille and Leon, Spain
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Melgar de Tera, Castille and Leon, Spain
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San Martn de Castaeda, Castilla y Len, Espaa
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Pleurosigma (ploo-row-sig-ma) and Gyrosigma are two rather similar genera of sigmoid-shaped pennate diatoms found in intertidal sediments, salt marshes and so on. The nucleus is located at the centre of the cell. The plastids contain chlorophylls a and c which gives the yellowy-brown colour. This picture is taken of the surface of one of the valves and shows the raphe that is used in locomotion, and shows the plastids. Refractile globules are said to be the storage products from excessive photosynthesis. Pleuosigma is distinguished in part by the angled pattern of marks on the valve of the frustule. Differential interference contrast.
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Dorsal infraciliature of the haptorid ciliate, Monodinium balbianii (FABRE-DOMERGUE, 1888). The dorsal side is distinguished by the five parallel rows of clavate (club-shaped) cilia (the dorsal brush) just posterior to the anterior wreath of ciliated basal bodies. The longitudinal files of somatic kinetosomes (not seen well here) are unciliated except for the dorsal brush and the obliquely inclined closely spaced ciliated basal bodies that form the ciliary girdle. Darkly stained extrusomes are visible here. Collected from a freshwater pond near Boise, Idaho March 2005. Stained by the silver carbonate technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991). Brightfield.
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Mesodinium (me-sew-din-ee-um) common marine ciliate, small with a wreath which includes forward and rearward pointing cilia. Often small tentacles emerge from the apex of the cell. The tentacles may seem forked at their tips They have a jumping motion often coming to rest, spinning for a few seconds before dashing off to somewhere else. One species includes red algal symbionts and may occur in sufficient numbers to cause a red tide - but not toxic. Differential interference contrast.
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Originally described by Ehrenberg under the name Trachelocerca viridis.
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Ventral view of the haptorid ciliate, Acropisthium mutabile (Perty, 1852). The cell body is ovoid to cylindrical. The posterior tapers to a short point. The fixation and staining process swells the cells. The anterior end forms a blunt snout with an apical cytostome. Short trichites support the cytopharynx (not seen here). There is wreath of longer cilia just posterior to the bare anterior snout. There are 22 widely spaced uniform longitudinal somatic kineties. The anterior halves of three dorsal kineties are made up of clavate (short club-shaped) cilia forming a dorsal brush (not seen in this view).Collected from freshwater pond near Boise, Idaho August 2004. This specimen is stained by a silver carbonate technique (see Foissner, W.Europ. J. Protistol.27,313-330;1991). Brightfield optics.
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Luporinophrys micelae (FOISSNER,2005). Collected from an ephemeral puddle on a flood-irrigated grass lawn in Boise, Idaho, 2007.Phase contrast.
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Trachelophyllum apiculatum (Perty, 1852) Claparède & Lachmann, 1859.Predatory ciliate with surface coated with a single type (probably Type I) of fine organic scales (i.e. lepidosomes). Identification is tentative since scanning electron microscopy is required for diagnostic lepidosome characterization. Collected from a freshwater pond near Boise, Idaho.DIC.
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Lacrymaria lagenula.
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Lumbreras, La Rioja, Spain
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Sobrado, Galicia, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Galende, Castille and Leon, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Mohedas de la Jara, Castille la Mancha, Spain
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Canencia, Madrid, Spain
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Lardero, La Rioja, Spain
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Ribadelago, Castille and Leon, Spain
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Mahide, Castille and Leon, Spain
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Galende, Castille and Leon, Spain