-
-
Vahlkampfia (vall-camp-fee-a) (= Schizopyrenus - skitz-owe-pyre-een-us ?) a heterolobose amoeba, pseudopodia are produced in sudden bulges, and are lobose. Cyst with irregular outer wall. Differential interference contrast.
-
Stachyamoeba (stack-ee-a-me-ba) is a free-living amoeba, usually flattended, expanded anterior margin with broad hyaline zone. With filaments arising from the uroid. At one time treated as a gruberellid and probably related to the acrasids, it can be seen to have a flagellated stage with two flagella which indicates that it is a fairly conventional heteroloboseid. Phase contrast.
-
Cruzella marina De Faria et al., 1922. Cells metabolic, about 27.5 microns, spindle-shaped or oval, slightly compressed on the sides, with sharp-pointed posterior end, when anterior end is terminated by a long snout. The anterior flagellum is shorter than the trailing flagellum, it is equal to the body length and it emanates from the end of the snout. The trailing flagellum emanates just below the snout and is twice the body length. The contractile vacuole not described. Nuclues in the centre.
-
Portrait of the colorless euglenoid flagellate, Menoidium bibacillatum (Pringsheim, 1942). Strongly flattened. One side curved with the other more straight. One emergent flagellum. Stigma absent. Paramylon bodies are dimorphic with smaller round and larger elongate ring forms. Swims rotating on long axis. Highly refractile. From standing freshwater near Boise, Idaho. DIC.
-
-
Portrait ((dorsal surface) of the colorless benthic marine protist, Stephanopogon apogon (Borror, 1965). The taxonomic position of Stephanopogon is uncertain. Once thought to be a ciliate, electron microscopic studies of S. apogon revealed absence of ciliate characteristics such as pellicular alveoli, infraciliature (e.g. kinetodesmal fibrils, postciliary microtubules and transverse microtubules) and nuclear dualism. S. apogon is elongate and moderately dorsoventrally flattened. The cell is curved slightly to the right. The posterior is round and the anterior end obliquely truncate. There are approximately 6-8 longitudinal files of smooth flagellae limited to the ventral surface. The anterior apical cytostome is slit-like and bordered by a slightly raised lip (visible here). There are 2-16 homokaryotic nuclei (not seen here).A contractile vacuole is absent. Division occurs while encysted (palintomy). Collected from a commercial saltwater aquarium in Boise, Idaho September 2004. DIC.
-
Scale bar indicates 10 µm. Sample from the pond Hegne Moor situated in the vicinity of Lake Constance. The image was built up using several photomicrographic frames with manual stacking technique. Images were taken using Zeiss Universal with Olympus C7070 CCD camera.Image under Creative Commons License V 3.0 (CC BY-NC-SA).
-
Distigma (die-stig-ma), heterotrophic euglenid flagellate. There are two flagella which are attached to the cell in a flagellar pocket which is an invagination that leads to the front of the cell by a tube called the flagellar canal. The light disc near the front is the contractile vacuole which is located alongside the flagellar pocket which cannot be seen in this image. One flagellum is long, the other short. The cytoplasm has large amounts of paramylon granules. The cell can squirm (is metabolic). Phase contrast.
-
Jakoba incarcerata Bernard et al., 2000. Cells are 4 to 10microns Two flagella arise slightly sub-apically. They may be slightly acronematic. The anterior flagellum is usually shorter than the length of the cell. The posterior flagellum is up to one and a half times the length of the cell and may appear proximally thickened. The nucleus is located subapically. Food vacuoles containing bacteria are common. A refractile granule is frequently located in the middle of the cell. Typical cells are crescent-shaped with a groove occupying three quarters of the ventral face. The posterior flagellum beats with a short wavelength and amplitude pattern within the groove, often attaching to the posterior margin but with the distal portion free. Some cells lack a groove, have an ovoid to irregular profile, but have usually a posterior tail. Transformation from a grooved to a tailed profile has been observed. Grooved or tailed cells may attach to the substrate by a hooked anterior flalgellum or the tip of the posterior flagellum. Tailed cells often stick to the substrate by the tail, the cell body or irregular extensions thereof. Grooved, or more commonly, tailed cells may swim with a smooth spiral path, with the anterior flagellum directed forward. Occasionally, non-grooved cells were observed with anterior flagella up to four times the length of the cell directed posteriorly in a curving arc. These cells swim or attach to the substrate by the cell body. Electron-micrographs of cells from the type culture shows a single vane on the dorsal side of the posterior flagellum.
-
10.1371/journal.pmed.0050055.g003/Simarro et al. 2008 [PLos Medicine 5(2): e55]
EOL staff
Map of Africa Showing the Epidemiological Status of Countries Considered Endemic for Human African Trypanosomiasis
-
Aldcliffe, England, United Kingdom
-
Naegleria gruberi
-
So called euglenid flagellate
-
Trypanosoma cruzi
-
Bodo (boe-dough) saliens Larsen and Patterson, 1990. Cells are usually elongate elliptical and somewhat inflexible, and are 4 to 12 microns long (mostly 6 to 9 microns). Two flagella unequal in length emerge subapically from a shallow pocket. The anterior flagellum appears inactive, is as long as or slightly shorter than the cell and is held forwards with a single anterior curve held perpendicular to the substrate. The acronematic posterior flagellum is typically directed straight behind the cell and is about 2.2 to 3.5 times cell length. The cells swim in rapid darts in straight lines. Frequently observed. Description based on observations of 43 cells.
-
Vahlkampfia (vall-camp-fee-a) (= Schizopyrenus - skitz-owe-pyre-een-us ?) a heterolobose amoeba, pseudopodia are produced in sudden bulges, and are lobose. Large hyaline region. Also with posterior contractile vacuole, nucleus with nucleolus and various food vacuoles and inclusions. Usually with a small uroid giving rise to filaments, but this is not evident here. Phase contrast.
-
Stachyamoeba (stack-ee-a-me-ba) is a free-living amoeba, usually flattended, expanded anterior margin with broad hyaline zone. With filaments arising from the uroid. At one time treated as a gruberellid and probably related to the acrasids, it can be seen to have a flagellated stage with two flagella which indicates that it is a fairly conventional heteroloboseid. Cysts have an irregular wall. Differential interference contrast.
-
Cells metabolic, about 27.5 microns, spindle-shaped or oval, slightly compressed on the sides, with sharp-pointed posterior end, when anterior end is terminated by a long snout. The anterior flagellum is shorter than the trailing flagellum, it is equal to the body length and it emanates from the end of the snout. The trailing flagellum emanates just below the snout and is twice the body length. The contractile vacuole not described. Nuclues in the center. ATCC 50326.
-
Portrait of the colorles euglenoid flagellate,Menoidium bibacillatum (Pringsheim, 1942). Strongly flattened. One side curved with the other more straight. One emergent flagellum. Stigma absent. Paramylon bodies are dimorphic with smaller round and larger elongate ring forms. Swims rotating on long axis. Highly refractile. From standing freshwater near Boise, Idaho. Phase contrast.
-
Distigma sennii Pringsheim, 1942. Metabolic swimming euglenid, cell typically club-shaped, broader anteriorly and truncated with an apical canal-opening, the posterior end of cell tapers, cells are 40 - 62 microns long. With two flagella, unequal in length. The longer flagellum is about 0.25-0.35 cell length and the recurrent flagellum is very short (5 - 6 microns), slightly curved and directed sideways or to the posterior of the cell. The pellicle seems smooth. The reservoir is in the middle of the cell with an associated contractile vacuole. A nucleus is located centrally or slightly behind the centre of the cell. The cell contains a large number of ellipsoidal or cylindical refractile grains and when swimming the cell moves quickly and rotates.
-
Portrait (ventral surface) of the colorless benthic marine protist, Stephanopogon apogon (Borror, 1965). The phylogenetic affinities of Stephanopogon are uncertain. Once thought to be a ciliate, electron microscopic studies of S. apogon revealed absence of ciliate characteristics such as pellicular alveoli, infraciliature (e.g. kinetodesmal fibrils, postciliary microtubules and transverse microtubules) and nuclear dualism. S. apogon is elongate and moderately dorsoventrally flattened. The cell is curved slightly to the right. The posterior is round and the anterior end obliquely truncate. There are approximately 6-8 longitudinal rows of smooth flagella limited to the ventral surface. The anterior apical cytostome is slit-like and bordered by a slightly raised lip. There are 2-16 homokaryotic nuclei (not seen here). Division occurs while encysted (palintomy). Collected from a commercial saltwater aquarium in Boise, Idaho September 2004. DIC.
-
-
Euglena ehrenbergii. Cell observed in freshwater habitats 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.