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Nassula microstoma.
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Description: English: A picture of the ciliate Nassula, with macronucleus,contractile vacuole and cyrtos (cytopharyngeal basket) identified. Date: 7 October 2011. Source: Own work. Author:
Deuterostome.
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Description: English: Nassula, showing bright colours of partially digested cyanobacteria. Date: 9 February 2013, 15:06:07. Source: Own work. Author:
Deuterostome.
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Description: English: Nassula ornata, showing details of cytopharyngeal basket and macronucleus. Date: 9 February 2013, 14:56:17. Source: Own work. Author:
Deuterostome.
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Description: English: Nassula ciliate undergoing binary fission. Date: 8 October 2011. Source: Own work. Author:
Deuterostome.
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Mahide, Castille and Leon, Spain
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Logroo, La Rioja, Espaa
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Trefacio, Castilla y Len, Espaa
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Galende, Castille and Leon, Spain
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Arnedillo, La Rioja, Spain
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Arnedillo, La Rioja, Spain
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Right dorsolateral view of the infraciliature of the large nassulid ciliate Obertrumia aurea (Ehrenberg, 1833; Foissner 1987). Synonym of Nassula aurea. Obertrumia is distinguished by it's bipartite "hypostomial frange", linear arrays of ciliary tufts. A sigmoid ventrolateral frange runs anteriorly and to the left. The dorsal termination of this part is seen as a vertical arrangement of rectangular collections of kinetids on the viewer's left in this image. It terminates at the left end of the horizontal line of ciliary tufts on the dorsal surface.The uniform longitudinal somatic kineties are well seen here. In vivo the cell appears brightly colored (orange, green or violet) due to multiple food vacuoles containing ingested cyanobacteria. Numerous small mucocysts give the cortex a roughly granular appearance. O. aurea feeds mainly on cyanobacteria. Silver carbonate stain (see Foissner, W.Europ. J. Protistol.27,313-330;1991). Collected from a freshwater aquaculture pond near Boise,Idaho November 2004. Brightfield.
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Ventral infraciliature of the large nassulid ciliate Obertrumia aurea (Ehrenberg, 1833; Foissner 1987). Synonym of Nassula aurea. Obertrumia is distinguished by it's bipartite "hypostomial frange",linear arrays of ciliary tufts. A sigmoid ventrolateral frange begins posterior to the cytostome running anteriorly and to the left (viewer's right) around to the dorsal surface. The dorsal termination is not seen in this image. The ventrolateral part of the frange terminates at the left end of the horizontal line of ciliary tufts on the dorsal surface. The uniform longitudinal somatic kineties, interrupted by the hypostomial frange, are well seen here. The multiple darkly stained micronuclei are seen overlying the spherical macronucleus in this image.The small circular structure to the viewer's left just posterior to the macronucleus is the excretory pore of the contractile vacuole. The thin dark longitudinal line posterior to this is the cytopyge (cell anus).In vivo the cell appears brightly colored (orange, green or violet) due to multiple food vacuoles containing ingested cyanobacteria. Numerous small mucocysts give the cortex a roughly granular appearance. O. aurea feeds mainly on cyanobacteria. Silver carbonate stain (see Foissner, W.Europ. J. Protistol.27,313-330;1991). Collected from a freshwater aquaculture pond near Boise, Idaho,Idaho November 2004. Brightfield optics.
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Dorsal infraciliature of the large nassulid ciliate Obertrumia aurea (Ehrenberg, 1833; Foissner 1987). Synonym of Nassula aurea. Obertrumia is distinguished by it's bipartite "hypostomial frange", linear arrays of ciliary tufts. A sigmoid ventrolateral frange runs anteriorly and to the left. The dorsal termination of this part is seen as a vertical arrangement of rectangular collections of kinetids (blue arrow). It terminates at the left end of the horizontal line of ciliary tufts on the dorsal surface (yellow arrow). The uniform longitudinal somatic kineties are well seen here. In vivo the cell appears brightly colored (orange, green or violet) due to multiple food vacuoles containing ingested cyanobacteria. Numerous small mucocysts give the cortex a roughly granular appearance. O. aurea feeds mainly on cyanobacteria. Silver carbonate stain (see Foissner, W.Europ. J. Protistol.27,313-330;1991). Collected from a freshwater pond near Idaho City, Idaho Septmeber 2004. Brightfield optics.
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Portrait of Obertrumia aurea(Ehrenberg, 1833; Foissner 1987). Widely distributed nassulid ciliate with well developed cytopharyngeal basket or cyrtos (viewer's upper left). Fed organisms may contain brightly colored orange, blue and purple food vacuoles. O. aurea has a bipartite hypostomial frange (not seen here). From a freshwater pond near Boise, Idaho. Oblique illumination This image was taken by William Bourland. He now uses a Zeiss Axioskop 2 with a Spot Insight CCD camera (Diagnostic Instruments).
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Detail of the large Nnassulid ciliate Obertrumia aurea (Ehrenberg, 1833; Foissner 1987). Synonym of Nassula aurea. Obertrumia is distinguished by it's bipartite "hypostomial frange", linear arrays of ciliary tufts. A sigmoid ventrolateral frange (seen most clearly posterior to the cytostome in this image) runs anteriorly and to the left and is separated from a horizontal line of ciliary tufts on the dorsal surface. The cell appears brightly colored (orange, green or violet) due to multiple food vacuoles containing ingested cyanobacteria. Numerous small mucocysts give the cortex a roughly granular appearance. O. aurea feeds mainly on cyanobacteria. Collected from a freshwater pond near Boise, Idaho November 2003. DIC optics.
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Detail of the large nassulid ciliate Obertrumia aurea (Ehrenberg, 1833; Foissner 1987). Synonym of Nassula aurea. Obertrumia is distinguished by it's bipartite "hypostomial frange", linear arrays of ciliary tufts. A sigmoid ventrolateral frange runs anteriorly and to the left (not seen in this image) and is separated from a horizontal line of ciliary tufts on the dorsal surface (seen here). The cell appears brightly colored (orange, green or violet) due to multiple food vacuoles containing ingested cyanobacteria. Numerous small mucocysts give the cortex a roughly granular appearance. O. aurea feeds mainly on cyanobacteria. Collected from a freshwater pond near Boise, Idaho November 2003. DIC optics.
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Detail of the large nassulid ciliate Obertrumia aurea (Ehrenberg, 1833; Foissner 1987). Synonym of Nassula aurea. Obertrumia is distinguished by it's bipartite "hypostomial frange", linear arrays of ciliary tufts. There is a prominent cytopharyngeal basket (nasse) composed of stout nematodesmata at the base of a shallow oral introitus in the anterior 1/3 of the cell. Focal swellings of the nematodesmata give the appearance of a ring (annulus) near the outer end of the nasse. Numerous small mucocysts give the cortex a roughly granular appearance. O. aurea feeds mainly on cyanobacteria. Collected from a freshwater pond near Boise, Idaho November 2003. DIC optics.
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Portrait of the large nassulid ciliate Obertrumia aurea (Ehrenberg, 1833; Foissner 1987). Synonym of Nassula aurea. Obertrumia is distinguished by it's bipartite "hypostomial frange", linear arrays of ciliary tufts. A sigmoid ventrolateral frange runs anteriorly and to the left and is separated from a horizontal line of ciliary tufts that lies on the dorsal surface. This specimen is slightly compressed, the cell outline normally appearing as a more elongate ellipsoid. The cell appears brightly colored (orange, green or violet) due to multiple food vacuoles containing ingested cyanobacteria. The single spherical macronucleus is seen posteriorly. There is one large lateral contractile vacuole, which fills from smaller surrounding vacuoles rather than collecting canals (seen well here). There is a prominent cytopharyngeal basket (nasse) composed of stout nematodesmata at the base of a shallow oral introitus in the anterior 1/3 of the cell. Focal swellings of the nematodesmata give the appearance of a ring near the outer end of the nasse. Numerous small mucocysts give the cortex a roughly granular appearance. O. aurea feeds mainly on cyanobacteria. Collected from a freshwater pond near Boise, Idaho November 2003. DIC optics.
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Right dorsolateral view of the infraciliature of the large nassulid ciliate Obertrumia aurea (Ehrenberg, 1833; Foissner 1987). Synonym of Nassula aurea. Obertrumia is distinguished by it's bipartite "hypostomial frange", linear arrays of ciliary tufts. A sigmoid ventrolateral frange runs anteriorly and to the left. The dorsal termination of this part is seen as a vertical arrangement of rectangular collections of kinetids on the viewer's left in this image. It terminates at the left end of the horizontal line of ciliary tufts on the dorsal surface.The uniform longitudinal somatic kineties are well seen here. In vivo the cell appears brightly colored (orange, green or violet) due to multiple food vacuoles containing ingested cyanobacteria. Numerous small mucocysts give the cortex a roughly granular appearance. O. aurea feeds mainly on cyanobacteria. Silver carbonate stain (see Foissner, W.Europ. J. Protistol.27,313-330;1991). Collected from a freshwater aquaculture pond near Boise,Idaho February 2006. Brightfield.
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Originally described by Schewiakoff under the name Nassula aurea. Ventral view, slightly rotated. a--Anus al--Pellicular alveoli ad. w--Adoral ciliated zone (hypostomial frange) cp--Cortical plasma cv--Contractile vacuole g--Gelatinous layer h--Ectoplasm of a homogenous appearance oe--Throat N--Macronucleus ncl -- Micronucleus nk1-nk4 -- Food particles in various stages of digestion o -- Mouth oe -- Throat pe -- Excretory pore pi -- Pigmented spot
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Originally described by Schewiakoff under the name Nassula aurea. Detail of cytopharyngeal ""eel-basket."" Key to abbreviations: kr--Plasmatic collar of the rod system o--Mouth r--Plasmatic ring encircling the cyrtos (basket) st--Cytopharyngeal basket vh--Cavity before mouth opening
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Originally described by Ehrenberg under the name Nassula aurea.
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Originally described by Ehrenberg under the name Nassula elegans.