Kerona pediculus (O. F. Muller, 1773) Blochmann, 1886, a hypotrich ciliKerona pediculus ate that lives on the surface of freshwater Hydra, and can consume epithelial and other cells from its host. Cell from ventral side showing rows of vental cirri. Differential interference contrast optics. This image was taken by William Bourland. He now uses a Zeiss Axioskop 2 with Spot Insight and Spot Flex CCD cameras (Diagnostic Instruments). Image copyright: William Bourland, image used under license to MBL (micro*scope).
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From the collection
Freshwater and Terrestrial Microbes of Idaho (USA) and Elsewhere
|Description of Kerona pediculus: Oxytrichid ciliate, 120-200 micrometres long. Body kidney-shaped, dorsoventrally flattened. Macronucleus in two parts, one in the anterior lobe of the body, the other in the posterior. Contractile vacuole near the equator in the posterior half, on left side just below the buccal cavity. Prominent AZM, 2 small undulating membranes on right of cytostome. 6 rows of ventral cirri angled obliquely toward anterior right, a short patch of transverse cirri in a single row. Marginal cirri at right and left sides, slightly overlapping at the posterior. Caudal cirri, slightly longer than the marginals. Dorsal bristles in 12-16 longitudinal rows. Ectocommensal on Hydra and Cristatella. |