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Ribadelago de Franco, Castille and Leon, Spain
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Alforja, Catalonia, Spain
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Casas de Fadoncino, Castille and Leon, Spain
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Casas de Fadoncino, Castille and Leon, Spain
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Petalomonas (pet-al-owe-moan-ass), rigid heterotrophic (no plastids) euglenid, one emerging flagellum which points in front of the moving cells. The flagellum starts within the flagellar pocket (also called the reservoir, and seen to the right) extends through a flagellar canal (not visible) and out at or near the apex of the cell. Either absorbs soluble food or consumes small particles although no mouth is visible by light microscopy. This species is probably P. pusillum, one of the smallest species and usually considered to have a smooth surface, although careful microscopy reveals minor ridges and folds. With cysts. Phase contrast.
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Petalomonas (pet-al-owe-moan-ass), rigid heterotrophic (no plastids) euglenid, one emerging flagellum which points in front of the moving cells. The flagellum starts within the flagellar pocket (also called the reservoir) extends through a flagellar canal and out at or near the apex of the cell. Either absorbs soluble food or consumes small particles although no mouth is visible by light microscopy. Most species have longitudinal or slightly spiral ridges or folds. Mode of feeding is not clear. Common in freshwater and marine ecosystems. Differential interference contrast.
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Petalomonas (pet-al-owe-moan-ass), rigid heterotrophic (no plastids) euglenid, one emerging flagellum which points in front of the moving cells. The flagellum starts within the flagellar pocket (also called the reservoir) extends through a flagellar canal and out at or near the apex of the cell. Either absorbs soluble food or consumes small particles although no mouth is visible by light microscopy. Most species have longitudinal or slightly spiral ridges or folds. The structure to the left and near the equator of the cell is its nucleus. Mode of feeding is not clear. Common in freshwater and marine ecosystems. Phase contrast.
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Petalomonas (pet-al-owe-moan-ass), rigid heterotrophic (no plastids) euglenid, one emerging flagellum which points in front of the moving cells. The flagellum starts within the flagellar pocket (also called the reservoir) extends through a flagellar canal (not visible) and out at or near the apex of the cell. Either absorbs soluble food or consumes small particles although no mouth is visible by light microscopy. Most species like this one have longitudinal or slightly spiral ridges or folds. Phase contrast.
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Petalomonas (pet-al-owe-moan-ass), rigid heterotrophic (no plastids) euglenid, one emerging flagellum which points in front of the moving cells. The flagellum starts within the flagellar pocket (also called the reservoir, and seen to the right) extends through a flagellar canal (not visible) and out at or near the apex of the cell. Either absorbs soluble food or consumes small particles although no mouth is visible by light microscopy. This species is probably P. pusillum, one of the smallest species and usually considered to have a smooth surface, although careful microscopy reveals minor ridges and folds. With cysts. Phase contrast.
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Petalomonas (pet-al-owe-moan-ass), rigid heterotrophic (no plastids) euglenid, one emerging flagellum which points in front of the moving cells. The flagellum starts within the flagellar pocket (also called the reservoir, and seen to the left) extends through a flagellar canal (not visible) and out at or near the apex of the cell. Either absorbs soluble food or consumes small particles although no mouth is visible by light microscopy. This species is P. pusillum, one of the smallest species and usually considered to have a smooth surface, although careful microscopy reveals minor ridges and folds. Phase contrast.
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Petalomonas (pet-al-owe-moan-ass), rigid heterotrophic (no plastids) euglenid, one emerging flagellum which points in front of the moving cells. and helps hold the cells against the substrate. The flagellum starts within the flagellar pocket (also called the reservoir) extends through a flagellar canal and out at or near the apex of the cell. Either absorbs soluble food or consumes small particles although no mouth is visible by light microscopy. Most species bear longitudinal or slightly spiral ridges or folds. Mode of feeding is not clear. Common in freshwater and marine ecosystems. Phase contrast.
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Petalomonas (pet-al-owe-moan-ass), rigid heterotrophic (no plastids) euglenid, one emerging flagellum which points in front of the moving cells. The flagellum starts within the flagellar pocket (also called the reservoir, and seen to the left) extends through a flagellar canal (not visible) and out at or near the apex of the cell. Either absorbs soluble food or consumes small particles although no mouth is visible by light microscopy. Phase contrast.
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Petalomonas observed in freshwater sediments in the vicinity of Broome, Western Australia in September 2003. This image was taken using phase contrast optics. This work was supported by the Australian Biological Resources Study.
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Collected samples from Nobska pond (blackish water), Woods Hole, Massachusetts. Focused on the cell surface (left) and flagellum (right). It is unclear whether this organism has another flagellum (i.e., Notosolenus). Photographed by Hwan Su Yoon.
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Petalomonas cantuscygni Cann and Pennick, 1986. Cell rigid, flattened dorsoventrally, 6 dorsal keels, single ventral canal. Single flagellum inserted into a deep vacuole, no contractile vacuole. Marine in nature, but grows in marine and freshwater. Nucleus in middle of cell. Length 9-15 microns, width 8-8.5 microns
