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This species has spines of two lengths and that fork at their extremity. It also frequently occurs, as in this case, with symbiotic green algae. Phase contrast micrograph.
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Detail of the siliceous scales of the centroheliozoan, Rraphidocystis lemani (Penard, 1904) Nicholls and Dürrschmidt, 1985. This species has straight tubular elements (one of these is clearly seen at one o'clock in this image) as well as shorter funnel-shaped elements and tangential plate scales.Collected from organically enriched sediments of slow-moving freshwater stream near Boise, Idaho. DIC
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One of the elongate hollow scales that coats the surface of this centrohelid heliozoon. Whole scale viewed by transmission electron microscopy.
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Detail of long radial trumpet-shaped siliceous spines of Raphidocystis tubifera (Penard, 1904). The periplast is composed of 3 types of siliceous elements: elliptical tangential plate scales, long radial trumpet-like scales and short, broad radial funnel-shaped scales. From slow flowing organically enriched freshwater stream near Boise, Idaho. DIC.
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Raphidocystis tubifera (Penard, 1904), a centrohelid heliozoan. The periplast is composed of 3 types of siliceous elements: elliptical tangential plate scales, long radial trumpet-like scales and short, broad radial funnel-shaped scales. The latter two types are seen well in this image at the upper margin of the periplast. The tangential elements are difficult to see. The long axopodia and their extrusomes are visible on the viewer's right in this image. Although species identification rests on EM morphology of the tangential plate scales, the organisms in these images conform to the description of R. tubifera (Mikrjukov,K.A. Arch. Protistenkd. 147: 205-212). From slow flowing organically enriched freshwater stream near Boise, Idaho. Phase contrast.
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Raphidocystis tubifera (Penard, 1904), a centrohelid heliozoan. The periplast is composed of 3 types of siliceous elements: elliptical tangential plate scales, long radial trumpet-like scales and short, broad radial funnel-shaped scales. The latter two types are seen well in this image at the upper margin of the periplast. The tangential elements are difficult to see. The long axopodia and their extrusomes are visible at 12 o'clock in this image. Zoochlorellae are seen in the cytoplasm. Although species identification rests on EM morphology of the tangential plate scales, the organisms in these images conform to the description of R. tubifera (Mikrjukov,K.A. Arch. Protistenkd. 147: 205-212). From slow flowing organically enriched freshwater stream near Boise, Idaho. Differential interference contrast.
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Raphidocystis tubifera (Penard, 1904).DIC.
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Raphidocystis tubifera (Penard, 1904). Phase contrast.
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Raphidocystis tubifera (Penard, 1904). DIC.
