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Heterophrys (het-err-off-riss) is a centrohelid heliozoon - the most speciose group of heliozoa. The heliozoa do not form a natural (monophyletic and holophyletic) group of protists, but a type of organization that have been arrived at from a number of different evolutionary lineages. Heterophrys is apparently naked, careful scrutiny usually reveals delicate radiating (organic) spicules. the arms terminate on a non-nuclear organizing centre (the dark dot in this cell). Heliozoa are predators, motile prey is captured after swimming into the arms. This cell seems to have been eating algae. Differential interference contrast.
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Heterophrys (het-err-off-riss) is a centrohelid heliozoon - the most speciose group of heliozoa. The heliozoa do not form a natural (monophyletic and holophyletic) group of protists, but a type of organization that have been arrived at from a number of different evolutionary lineages. Heterophrys is apparently naked, careful scrutiny usually reveals delicate radiating (organic) spicules. the arms terminate on a non-nuclear organizing centre (the dark dot in this cell. Heliozoa are predators, motile prey is captured after swimming into the arms. This cell seems to have been eating algae. Phase contrast.
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Heterophrys (het-err-off-riss) is a centrohelid heliozoon - the most speciose group of heliozoa. Heterophrys is apparently naked, careful scrutiny usually reveals delicate radiating (organic) spicules. the arms terminate on a non-nuclear organizing centre (the dark dot in this cell. Heliozoa are predators, motile prey is captured after swimming into the arms - as can be seen here. Phase contrast.
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Heterophrys (het-err-off-riss) is a centrohelid heliozoon, distinguished by having radially arrayed organic spicules arising from the surface of the cell. The longer rays with granules are the arms - pseudopodial extensions supported by microtubules. The arms are used to capture food. Phase 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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Portrait of heterophrys, a small heliozoon coated in very thin organic spines. This thin axopodia contain prominent spherical extrusomes are fully extended in this image. Axopodia contract when the organism is disturbed, bunching extrusomes at the cell surface as seen in the other image. Usually described as a marine genus, these individuals were collected from an organically enriched standing freshwater pond near Boise, Idaho. Phase contrast
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Portrait of Heterophrys, a centroheliozo0n with fine radial organic spicules passing through a mucus coat. Axopodia bearing extrusomes are seen in this image. Some species contain endosymbiotic algae. From freshwater pond near Boise, Idaho. Phase contrast.
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Portrait of Heterophrys, a centroheliozoan with fine radial organic spicules passing through a mucous coat. Axopodia bearing extrusomes are seen in this image. Some species contain endosymbiotic algae. From freshwater pond near Boise, Idaho. Phase contrast.
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Phase contrast image of living cell, thin arms used for food capture.
