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[taxonomy:genus=Peranema]
Conjoined Peranema squirming as they pull apart from each other. Were they dividing or conjugating?
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Description: English: Diagram of Peranema, with major morphological features labelled. Date: 11 November 2011. Source: Own work. Author:
Deuterostome.
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Description: English: Diagram of Peranema, with morphological features labelled. Date: 11 November 2011. Source: Own work. Author:
Deuterostome.
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Description: English: Paranema Under Light Microscope. Date: 4 July 2012. Source: Own work. Author:
Iceclanl.
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Description: English: Peranema sp. (from pond in Wakefield, Quebec). Date: 10 November 2011. Source: Own work. Author:
Deuterostome.
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Luanco, Asturias, Spain
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Ribadelago de Franco, Castilla y Len, Espaa
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Madrid, Madrid, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Ribadelago, Castille and Leon, Spain
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Madrid, Madrid, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Ribadelago de Franco, Castille and Leon, Spain
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Peranema (pear-o-knee-ma) is one of the better known gliding heterotrophic euglenids. The body is referred to as sac-shaped but this applies best to P. trichophorum, the most common species and the one illustrated here. At first glance, it would seem that there is just one flagellum, but careful observations reveal a second flagellum tightly adpressed to the body or lying in a groove in the body surface. At magnifications such as this, this species usually cannot be distinguished from Jenningsia, which has a single flagellum. The recurrent structure looks a little wider than the normal ridges of the body. The body is metabolic - meaning it squirms, and members of this genus have an ingestion organelle with which to manipulate food into the body. Differential interference contrast.
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Portrait of a relatively large (116 microns long) species of Peranema, a common colorless phagotrophic euglenid flagellate. Peranema possesses two flagella but the shorter trailing flagellum is adherent to the body and not ordinarily seen. The thick anterior flagellum is characteristically held straight in with only the distal tip beating. The cell body is elongate and quite plastic exhibiting euglenoid metaboly when not swimming. The posterior end may be truncate or pointed. The anterior reservoir with adjacent contractile vacuole can be seen in this image. The reservoir and its apical opening are separate from the subapical cytostome and the two supporting rods of the ingestion apparatus. These anterior rods are well seen in this image. Pellicular striations are also evident. A prominent nucleus is visible at the junction of the middle and posterior thirds of the cell. From freshwater pond near Boise, Idaho. Brightfield illumination.
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Peranema is a euglenid without chloroplasts. This species moves with a thick flagellum sticking out in front. It eats debris and other protists. Animations by Rosemary Arbur of flagellar beat patterns are available
here.
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Peranema. Collected by ATOL team in Little Sippiwisset near to Woods Hole, Massachusetts during the Protistology Workshop at MBL. October-November 2005. Isolation and art by Adrian Reyes-Prieto.
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Peranema (pear-o-knee-ma) is one of the better known gliding heterotrophic euglenids. The body is referred to as sac-shaped but this applies best to P. trichophorum, the most common species and the one illustrated here. At first glance, it would seem that there is just one flagellum, but careful observations reveal a second flagellum tightly adpressed to the body or lying in a groove in the body surface. At magnifications such as this, this species usually cannot be distinguished from Jenningsia, which has a single flagellum. The recurrent structure looks a little wider than the normal ridges of the body. The body is metabolic - meaning it squirms, and members of this genus have an ingestion organelle with which to manipulate food into the body. Animations by Rosemary Arbur of flagellar beat patterns are available
here.Differential interference contrast.
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