Vannella

Arboli, Catalonia, Spain

Muelas del Pan, Castille and Leon, Spain

Melgar de Tera, Castille and Leon, Spain

Vannella (van-ell-a), naked free-living amoeba, moves with a single pseudopodium directed forwards (i.e. is unipodial). Hyaline region very extensive. Posteriorly, the uroid is just a stiffened region of cytoplasm. Consumes bacteria. Very similar to Platyamoeba, distinguished usually by the slightly broader aspect. Phase contrast.

Vannella (van-ell-a), naked free-living amoeba, moves with a single pseudopodium directed forwards (i.e. is unipodial). Hyaline region very extensive. Posteriorly, the uroid is just a stiffened region of cytoplasm. Consumes bacteria. Very similar to Platyamoeba, distinguished usually by the slightly broader aspect. Phase contrast.

Vannella (van-ell-a), naked free-living amoeba, moves with a single pseudopodium directed forwards (i.e. is unipodial). Hyaline region very extensive. Posteriorly, the uroid is just a stiffened region of cytoplasm. Contractile vacuole and nucleus evident. Consumes bacteria. Very similar to Platyamoeba, distinguished usually by the slightly broader aspect. Phase contrast.

Vannella (van-ell-a) a fan shaped naked amoeba, made distinctive by the broad anterior margin (right) and extensive hyaline region. Nucleus located to centre bottom of cell, uroid (posterior end) is to the left. Phase contrast. Material from Nymph Creek and Nymph Lake, thermal sites in Yellowstone National Park, photograph by Kathy Sheehan and David Patterson.

Vannella (van-ell-a) naked amoeba, fan shaped, with very broad hyaline zone. Phase contrast micrograph.

Vannella, a small naked amoeba with a large hyaline region. The cell is moving towards the top of the image. The nucleus with central nucleolus is located to the left posterior of the cell, there are clear vacuoles which form part of the contractile vacuole complex. The most posterior part of the cell forms a slightly contracted uroid. From Lake Donghu, China. Phase contrast micrograph.

Series of images showing this amoeba migrating across the slide.

Vannella (van-ell-a), naked free-living amoeba, moves with a single pseudopodium directed forwards (i.e. is unipodial). Hyaline region very extensive. Posteriorly, the uroid is just a stiffened region of cytoplasm. Consumes bacteria. Very similar to Platyamoeba, distinguished usually by the slightly broader aspect. This is V. aberdonica. Phase contrast.

Vannella (van-ell-a), naked free-living amoeba, moves with a single pseudopodium directed forwards (i.e. is unipodial). Hyaline region very extensive. Posteriorly, the uroid is just a stiffened region of cytoplasm. Consumes bacteria. Very similar to Platyamoeba, distinguished usually by the slightly broader aspect. This is V. aberdonica. Phase contrast.

Vannella (van-ell-a), naked free-living amoeba, moves with a single pseudopodium directed forwards (i.e. is unipodial). Hyaline region very extensive. Posteriorly, the uroid is just a stiffened region of cytoplasm. Consumes bacteria. Very similar to Platyamoeba, distinguished usually by the slightly broader aspect. This is V. aberdonica. Phase contrast.

Sampling date 04/2021. Scale bars indicate 25 µm.Tomographic images (the focal planes move from top to bottom).Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!As noted in arcella.nl/vannella-simplex/, in cultures and moist-chamber-preparations specimen of this amoebae species are commonly covered with patches of fecal pellets.Place name: Pond near Großostheim (Germany)Latitude: 49.88482168     Longitude: 9.09980822Microscope Zeiss Axioplan, camera Olympus OM-D-M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 04/2021. Scale bars indicate 25 µm.Tomographic images (the focal planes move from top to bottom).Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!As noted in arcella.nl/vannella-simplex/, in cultures and moist-chamber-preparations specimen of this amoebae species are commonly covered with patches of fecal pellets.Place name: Pond near Großostheim (Germany)Latitude: 49.88482168     Longitude: 9.09980822Microscope Zeiss Axioplan, camera Olympus OM-D-M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Scale bars indicate 25 µm.Motion study, four phases.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Pond near Großostheim (Germany)Latitude: 49.88482168     Longitude: 9.09980822Microscope Zeiss Axioplan, camera Olympus OM-D-M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 04/2021. Scale bars indicate 25 µm.Tomographic images (the focal planes move from top to bottom).Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!As noted in arcella.nl/vannella-simplex/, in cultures and moist-chamber-preparations specimen of this amoebae species are commonly covered with patches of fecal pellets.Place name: Pond near Großostheim (Germany)Latitude: 49.88482168     Longitude: 9.09980822Microscope Zeiss Axioplan, camera Olympus OM-D-M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Chart showing the position of the focal planes displayed in the slides above.Place name: Pond near Großostheim (Germany)Latitude: 49.88482168     Longitude: 9.09980822Microscope Zeiss Axioplan, camera Olympus OM-D-M5 MKII.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Scale bars indicate 25 µm.Motion study, four phases.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Pond near Großostheim (Germany)Latitude: 49.88482168     Longitude: 9.09980822Microscope Zeiss Axioplan, camera Olympus OM-D-M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Sampling date 04/2021. Scale bars indicate 25 µm.Tomographic images (the focal planes move from top to bottom).Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!As noted in arcella.nl/vannella-simplex/, in cultures and moist-chamber-preparations specimen of this amoebae species are commonly covered with patches of fecal pellets.Place name: Pond near Großostheim (Germany)Latitude: 49.88482168     Longitude: 9.09980822Microscope Zeiss Axioplan, camera Olympus OM-D-M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Scale bars indicate 25 µm.Motion study, four phases.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Pond near Großostheim (Germany)Latitude: 49.88482168     Longitude: 9.09980822Microscope Zeiss Axioplan, camera Olympus OM-D-M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page

Scale bars indicate 25 µm.Motion study, four phases.Please click on < or > on the image edges or on the dots at the bottom edge of the images to browse through the slides!Place name: Pond near Großostheim (Germany)Latitude: 49.88482168     Longitude: 9.09980822Microscope Zeiss Axioplan, camera Olympus OM-D-M5 MKII. DOF images.© Wolfgang Bettighofer,images under Creative Commons License V 3.0 (CC BY-NC-SA).For permission to use of (high resolution) images please contact postmaster@protisten.de.For further information about the image, please click here: Link to protisten.de page