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Pelomyxa is an amoeboid organism that inhabits mud in freshwater sites where there is little or no oxygen. The bright bits inside are pieces of sand.
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Multicilia marina Cienkowski, 1881. Cells are normally spherical in a culture, about 30-40 microns in diameter, however,some cells attain an oblong or irregular form. The majority of cells possess 20-30 long flagella, 1.5-2 times the cell diameter. The flagella differ from those of other heterotrophic flagellates by very weak movements, resulting in a similarity to heliozoan axopods. The locomotion of M ulticilia is slow, rotatory, without any definitive direction, therefore moving cells normally lack anterior and posterior ends. Cells glide in one direction for a very short distance and may change direction rapidly (including moving backwards). The cell rolls over when changing direction. The temporary anterior flagellum is then stretched and clasped along the substratum, only its apex continues to oscillate. The temporary posterior flagellum shows the same behaviour. Other flagella perform irregular movements without any visible coordination. After changing the salinity, cells become free floating and continue a weak oscillation of the flagella.
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This is a image of a sorocarp. Notice the slime trail at the base of the fruiting body.
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Badhamia panicea.
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Pelomyxa (peal-o-mix-a), a large pelobiont which developed some reputation as possibly the most primitive eukaryote. This argument was based on the fact that it does not have mitochondria, conventional dictyosomes if any, flagella are aberrant, and nuclear division was also thought to be aberrant. The arguments for a primitive status now seem to be unsound. Cytoplasm with small particles of sand. eats algae and detritus. Moves with fountain-flow motion (cytoplasm moving forward up the centre of the cell and then spilling out near the front. Posterior end crumpled, to form a uroid. Phase contrast micrograph.
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Hårup Sande, Silkeborg, Jylland, Danmark
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Suserup Skov, Danmark
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Allindelille Fredskov, Denmark
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Lille Øksø, Rold Skov, Jylland, Danmark
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Øksedal, Sebbersund, Jylland, Danmark
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Store Øksø, Rold Skov
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Kridtstien, Nystrup Plantage, Thy, Danmark
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Mushroom Observer Image 44566: Diderma Pers.,
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Mushroom Observer Image 30714: Comatricha Preuss
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Mushroom Observer Image 352461: Stemonitopsis (Nann.-Bremek.) Nann.-Bremek.
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Mushroom Observer Image 408285: Physarum cinereum (Batsch) Pers.
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Mushroom Observer Image 1012987: Hemitrichia Rostaf.
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Mushroom Observer Image 485710: Physarum compressum Alb. & Schwein.
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Mushroom Observer Image 114562: Lindbladia tubulina Fr.
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Mushroom Observer Image 348937: Physarum viride (Bull.) Pers.
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Mushroom Observer Image 413141: Didymium nigripes (Link) Fries
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Mushroom Observer Image 326234: Trichia scabra Rostaf
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Mushroom Observer Image 335960: Lycogala Adans.
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Mushroom Observer Image 525544: Tubifera J.F. Gmel.
