Ventral surface of the hypotricvh ciliate, Uronychia. Isolated from sandy samples taken from Sippiwissett marsh. Image copyright: image used under license to MBL (micro*scope).
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From the collection
ATOL protistology workshop 2005
|Description of Uronychia transfuga: This is a cosmopolitan hypotrich. The oval shaped body is variable in size (50-260 microns long), its dorsal surface is arched and may be smooth or with 3-4 ridges. At the posterior right there are the 3 characteristically sickle-shaped right caudal cirri. The large peristome and two posterior cavities occupy most of the ventral surface. Prominent adoral membranelles are situated along the anterior edge of the body and these emerge dorsally. At the posterior left of the peristome, there are 4-5 paroral membranelles lying in a pocket-ljke invagination. Large undulating membranes border two sides of the peristome. There larger 4-5 large transverse cirri implanted in the larger posterior cavity on the right, sometimes with 1 or 2 satellite cirri. In the posterior left cavity there are 2 large marginal cirri sometimes accompanied by a few, usually 2, small cirri or cilia. The macronucleus varies from being a moniliform (5-13 segments) C-shape at resting stage, to being 2 irregular masses immediately after cell division. |