Eutetramitia

Willaertia (will-ert-ee-as), a heterolobose amoeba. The heterolobose amoebae usually move with the pseudopodia forming as sudden bulges. This is the cyst with its exit pores. Differential interference contrast.

Tetramitus (tet-rah-might-us) is one of the heterolobose amoebae, which can be found as amoebae, flagellates or cysts. The amoebae produce their pseudopodia suddenly, a pattern of behaviour referred to as eruptive as opposed to the more usual slow progressive formation of pseudopodia. With file filaments making up the posterior uroid. Contractile vacuole located at the posterior end of the cell. Phase contrast.

Tetramitus rostratus.

Percolomonas (perk-o-low-moan-ass) is an excavate flagellate - in that it has a ventral groove or gutter that is used in feeding, and is usually classified with the heterolobosea. Two to four flagella insert at the head of the groove, one (the recurrent flagellum) is much longer than the others. Often found in slightly smelly (i.e. anoxic) habitats. Phase contrast.

Percolomonas (perk-o-low-moan-ass) is an excavate flagellate - in that it has a ventral groove or gutter that is used in feeding, and is usually classified with the heterolobosea. Two to four flagella insert at the head of the groove, one (the recurrent flagellum) is much longer than the others. Often found in slightly smelly (i.e. anoxic) habitats. Phase contrast.

Percolomonas (perk-o-low-moan-ass) is an excavate flagellate - in that it has a ventral groove or gutter that is used in feeding, and is usually classified with the heterolobosea. Two to four flagella insert at the head of the groove, one (the recurrent flagellum) is much longer than the others. Often found in slightly smelly (i.e. anoxic) habitats. Differential interference contrast.

Percolomonas (perk-o-low-moan-ass) is an excavate flagellate - in that it has a ventral groove or gutter that is used in feeding, and is usually classified with the heterolobosea. Four flagella insert at the head of the groove. They insert in parallel. Often found in slightly smelly (i.e. anoxic) habitats. Phase contrast.

Percolomonas cosmopolitus (Ruinen, 1938) Larsen and Patterson, 1990. Obovate cell, 6-10microns long, with a ventral groove arising subapically and extending half the length of the cell. Four flagella insert subapically: one approximately twice the length of the cell, extending behind the cell, used for adhesion to substratum: three shorter flagella lie within the groove and are used to creat a current of water from which suspended particles are extracted. Nucleus anterior, with globular nucleolus.

Phase contrast image of some cells around a piece of debris, cells from ATCC strain 50343. ATCC data on this organism.

Phase contrast image of a cell showing the one long flagelum and thee short ones, cells from ATCC strain 50343. ATCC data on this organism.

Phase contrast image of a cell from ATCC strain 50343 showing four parallel flagella, three short and one long. ATCC data on this organism.

Percolomonas (perk-owe-low-moan-ass) descissus (Perty, 1852) Larsen and Patterson, 1990. Cells are ovoid to pyriform and about 9 to 15 microns long with a big ventral groove, which extends from the anterior end to half or three quarters the way down the cell. There are four flagella, which insert subapically and are directed ventrally and posteriorly. Three flagella are similar in length and one long flagellum is about 1.5 - 2 times the length of the cell. All flagella usually beat together and close to the groove. The longest flagellum appears to be acronematic. The nucleus is situated behind the apex of the cell. The cells swim by rotating movement and may attach to the substrate by the longest flagellum. The cells have typically with many food vacuoles. Cytoplasmic strands are seen in the posterior end of the cell. Observed frequently under anaerobic conditions.

Percolomonas descissus (Perty, 1852) Larsen and Patterson, 1990. Cells are ovoid to pyriform and about 9 to 15 microns long with a big ventral groove, which extends from the anterior end to half or three quarters the way down the cell. There are four flagella, which insert subapically and are directed ventrally and posteriorly. Three flagella are similar in length and one long flagellum is about 1.5 - 2 times the length of the cell. All flagella usually beat together and close to the groove. The longest flagellum appears to be acronematic. The nucleus is situated behind the apex of the cell. The cells swim by rotating movement and may attach to the substrate by the longest flagellum. The cells have typically with many food vacuoles. Cytoplasmic strands are seen in the posterior end of the cell. Observed more usually from anaerobic sources.

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.

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.

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.

Stephanopogon apogon (steff-anne-owe-poe-gone) is a marine genus of uncertain affinities and include a small handful of species. Cells are dorso-ventrally flattened, with a wide anterior mouth which may or may not have some barbs. It moves by using flagella which are laid out in longitudinal rows. For a long time erroneously considered to be a primitive ciliate (distinguished from real ciliates because it does not have macronuclei and micronuclei). This encysting cell can be seen to have several conventional nuclei with central nuceoli. Eats diatoms and detritus. Phase contrast.

Stephanopogon apogon (steff-anne-owe-poe-gone) is a marine genus of uncertain affinities and include a small handful of species. Cells are dorso-ventrally flattened, with a wide anterior mouth which may or may not have some barbs. It moves by using flagella which are laid out in longitudinal rows. For a long time erroneously considered to be a primitive ciliate (distinguished from real ciliates because it does not have macronuclei and micronuclei). Eats diatoms and detritus. Phase contrast.

Stephanopogon apogon (steff-anne-owe-poe-gone) is a marine genus of uncertain affinities and include a small handful of species. Cells are dorso-ventrally flattened, with a wide anterior mouth which may or may not have some barbs. It moves by using flagella which are laid out in longitudinal rows. For a long time erroneously considered to be a primitive ciliate (distinguished from real ciliates because it does not have macronuclei and micronuclei). Eats diatoms and detritus. Phase contrast.

Stephanopogon apogon (steff-anne-owe-poe-gone) is a marine genus of uncertain affinities and include a small handful of species. Cells are dorso-ventrally flattened, with a wide anterior mouth which may or may not have some barbs. It moves by using flagella which are laid out in longitudinal rows. This organism was for a long time through to be a ciliate - because it looks like a ciliate. But examination of the cellular organization revealed that it s internal architecture was very different to that of ciliates - and they don t have two kinds of nuclei - like ciliates. Like many ciliates, it has flagella in rows or kineties. The anterior margin is the mouth, and the eat bacteria. Differential interference contrast.