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Right dorsolateral surface view of the hymenostome ciliate, Frontonia angusta (Kahl, 1931). Very similar in overall apppearance to F. acuminata (Ehrenberg,1833)Buetschli,1889. F. angusta lacks the anterior apical collection of pigmented granules seen in F. acuminata and its contractile vacuole has 3-4 excretory pores (4 in this case).The approximately 6 µm long extrusomes are clearly visible. Ingested diatoms and green algae are present. Collected from a freshwater pond near Boise, Idaho.DIC.
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Mahide, Castilla y Len, Espaa
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Castille and Leon, Spain
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Rumoroso, Cantabria, Espaa
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Canencia, Madrid, Spain
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Franceses, Canary Islands, Spain
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Ventral infraciliature of the hymenostome ciliate, Frontonia angusta (Kahl, 1931). Very similar in overall apppearance to F. acuminata (Ehrenberg,1833)Buetschli,1889. F. angusta lacks the anterior apical collection of pigmented granules seen in F. acuminata and its contractile vacuole has 3-4 excretory pores (not visible here).The prominent preoral and postoral sutures are visible. The 3 curved adoral membranelles are seen on the viewer's right of the oral apparatus. The vestibular ciliary rows are seen to the viewer's left of the the oral apparatus.The postoral ciliary field is seen abutting the posterior margin of the peristome to the viewer's right of the postoral suture.Stained by the silver carbonate technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Collected from a freshwater pond near Boise, Idaho.Brightfield.
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Castille and Leon, Spain
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Canencia, Comunidad de Madrid, Espaa
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Matute, La Rioja, Spain
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Mahide, Castilla y Len, Espaa
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Ribadelago, Castille and Leon, Spain
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Mahide, Castille and Leon, Spain
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Ribadelago, Castille and Leon, Spain
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Madrid, Madrid, Spain
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Ovoid, 60-100 micron long. Numerous large trichocysts.
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Frontonia (front-own-ee-a) is a peniculine ciliate and as such is closely related to the familiar Paramecium. It has many crystalline inclusions called trichocysts (a special form of extrusome). When stressed the crystalline structure of these changes, and they are expelled in large numbers and forceably from the cell. This action can force the cell away from the noxious stimulus. The expelled, the trichocysts look like little spears attached to the slide or to the substrate. Phase contrast.
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Frontonia (front-own-ee-a) is a peniculine ciliate and as such is closely related to the familiar Paramecium. The mouth is supported by strong rods which assists Frontonia in ingesting its preferred food - diatoms and other moderate sized algae. A diatom can be seen inside the cell. The mouth is located at about 10 o clock. Like many peniculines the cell has many extrusomes lying just under the cell surface, and these are expelled when the cells are challenged. Large grey area is the nucleus. Phase contrast.
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Frontonia (front-own-ee-a) is a peniculine ciliate and as such is closely related to the familiar Paramecium. The mouth is supported by strong rods which assists Frontonia in ingesting its preferred food - diatoms and other moderate sized algae. Like many peniculines the cell has many extrusomes lying just under the cell surface, and these are expelled when the cells are challenged. Large grey area is the nucleus. Phase contrast.
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Frontonia (front-own-ee-a) is a peniculine ciliate and as such is closely related to the familiar Paramecium. The mouth is supported by strong rods which assists Frontonia in ingesting its preferred food - diatoms and other moderate sized algae. The mouth is located at about 10 o clock. Like many peniculines the cell has many extrusomes lying just under the cell surface, and these are expelled when the cells are challenged. Differential interference contrast.
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Frontonia (front-own-ee-a) is a peniculine ciliate and closely related to the familiar Paramecium. This image emphasises the cilia associated with the mouth. Like many peniculines the cell has many extrusomes lying just under the cell surface, and these are expelled when the cells are challenged. This species has black pigment granules. Differential interference contrast.
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Frontonia (front-own-ee-a) is a peniculine ciliate and closely related to the familiar Paramecium. The mouth (upper left) is supported by strong rods which assists Frontonia in ingesting its preferred food - diatoms (as here) and other moderate sized algae. Like many peniculines the cell has many extrusomes lying just under the cell surface, and these are expelled when the cells are challenged. This species has black pigment granules. Differential interference contrast.