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searched word: Homalozoon
Found 2 match(es) in the Formal Descriptions | Homalozoon vermiculare - Homalozoon vermiculare (Stokes,1887) Stokes,1890
Description;
Homalozoon vermiculare is a large, bottom-dwelling, carnivorous ciliate found in standing fresh water.Body 150-1500 um long; vermiform,laterally compressed, Anterior end slightly expanded as dsistinct rounded oral bulge packed with thin rod-shaped extrusomes;posterior end tapered to broadly rounded. Single moniliform macronucleus,about 25 micronuclei. 5-21 contractile vacuoles along dorsal side.4 types of extrusomes, 2 types of small subpellicular mucocysts and long (~5-15 um) and short (~2 um) thin rod-shaped extrusomes in the oral bulge, short extrusomes also scattered in cytoplasm.Prominent aggregation of refractile granules in cytoplasm posterior to oral bulge (parapharyngeal mass);composed of two types of granules,one composed of paraglycogen,he second type is comprised of concentric lamellae and is rich in magnesium, phosphorus, potassium, and calcium;function of parapharyngeal mass remains unknown.Somatic ciliature consists of 10-20 right longitudinal kineties with ~10 um cilia, 3-4 left kineties with 1-2 um bristles, anterior ends of these kineties bear clavate cilia comprising the dorsal brush.Circumoral kinety separate from somatic kineties.
| Homalozoon vermiculare - Homalozoon vermiculare (Stokes,1887) Stokes,1890
Description;
Homalozoon vermiculare is a large, bottom-dwelling, carnivorous ciliate found in standing fresh water.Body 150-1500 um long; vermiform,laterally compressed, Anterior end slightly expanded as distinct rounded oral bulge packed with thin rod-shaped extrusomes;posterior end tapered to broadly rounded. Single moniliform macronucleus,about 25 micronuclei. 5-21 contractile vacuoles along dorsal side.4 types of extrusomes, 2 types of small subpellicular mucocysts and long (~5-15 um) and short (~2 um) thin rod-shaped extrusomes in the oral bulge, short extrusomes also scattered in cytoplasm.Prominent aggregation of refractile granules in cytoplasm posterior to oral bulge (parapharyngeal mass);composed of two types of granules,one composed of paraglycogen,he second type is comprised of concentric lamellae and is rich in magnesium, phosphorus, potassium, and calcium;function of parapharyngeal mass remains unknown.Somatic ciliature consists of 10-20 right longitudinal kineties with ~10 um cilia, 3-4 left kineties with 1-2 um bristles, anterior ends of these kineties bear clavate cilia comprising the dorsal brush.Circumoral kinety separate from somatic kineties.
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| Found 11 match(es) in the Image Captions | Homalozoon - Homalozoon, a elongate ribbon-like predatory ciliate. The body is truncated (cut) off at the front end where the mouth is located, and pointed posteriorly. It has rows of cilia mostly on the ventral side, it glides over the substrate, sometimes contracting. Feeds on detritus and other protists. This image shows the line of contractile vacuoles which extends along the body. Flattened. Phase contrast micrograph.
| Homalozoon - Homalozoon, a elongate-ribbon like predatory ciliate. The body is truncated (cut) off at the front end where the mouth is located, and pointed posteriorly. It has rows of cilia mostly on the ventral side, it glides over the substrate, sometimes contracting. Feeds on detritus and other protists. This image shows the macronucleus, which takes to form of a row of ellip[tical beads attached end-to-end. The micronuclei are small round dark structures adjacent to the macronucleus. Phase contrast micrograph.
| Homalozoon - Homalozoon, a elongate ribbon-like predatory ciliate. The body is truncated (cut) off at the front end where the mouth is located, and pointed posteriorly. It has rows of cilia mostly on the ventral side, it glides over the substrate, sometimes contracting. Feeds on detritus and other protists. Phase contrast micrograph.
| Homalozoon - Homalozoon, a elongate ribbon-like predatory ciliate. The body is truncated (cut) off at the front end where the mouth is located, and pointed posteriorly. It has rows of cilia mostly on the ventral side, it glides over the substrate, sometimes contracting. Feeds on detritus and other protists. This image is of the mouth and shows the needle-like extrusomes lying under the cell surface - these are used to kill and capture prey. Behind the extrusomes is adense refractile mass that is involved in the feeding process. Differential interference contrast.
| Homalozoon vermiculare - Portrait of large haptorid ciliate Homalozoon vermiculare (STOKES,1887)STOKES,1890. Laterally flattened. Bluntly rounded anteriorly and tapered posteriorly. Contractile. Slit-like oral aperture with prominent oral bulge extrusomes. Multiple small contractile vacuoles along lateral margin. Macronucleus moniliform. Brightfield. From standing freshwater with abundant decomposing leaves near Boise, Idaho.
| Homalozoon vermiculare - Detail of anterior of Homalozoon vermiculare (STOKES,1887) STOKES,1890 showing dense collection of oral bulge extrusomes. The characteristic dense anterior aggregate of pharyngeal granules is well seen. The function of these is unclear. Brightfield. From freshwater pond near Boise, Idaho.
| Homalozoon vermiculare - Homalozoon vermiculare (STOKES,1887) STOKES,1890 seen here preying on a peritrich ciliate. The characteristic dense aggregate of granules can be seen. This is displaced by the ingested prey and then disperses as the food vacuole proceeds distally. From freshwater pond near Boise, Idaho. Brightfield
| Homalozoon vermiculare - Infraciliature (right side) of Homalozoon vermiculare (STOKES,1887) STOKES,1890.Collected from a eutrophic freshwater pond in Boise,Idaho June 2008.Stained by the Protargol A technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.
| Homalozoon vermiculare - Infraciliature (ventral side) of Homalozoon vermiculare (STOKES,1887) STOKES,1890. the posterior portion of the moniliform macronucleus and one of the numerous micronuclei are seen here.Collected from a eutrophic freshwater pond in Boise,Idaho June 2008.Stained by the Protargol A technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.
| Homalozoon vermiculare - Infraciliature (right side) of Homalozoon vermiculare (STOKES,1887) STOKES,1890. CK=circumoral kinety.OA=oral aperture.RSK=right somatic kineties.Collected from a eutrophic freshwater pond in Boise,Idaho June 2008.Stained by the Protargol A technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.
| Homalozoon vermiculare - Infraciliature (ventral side) of Homalozoon vermiculare (STOKES,1887) STOKES,1890. CK=circumoral kinety.DB=dorsal brush.LSK=left somatic kineties.Collected from a eutrophic freshwater pond in Boise,Idaho June 2008.Stained by the Protargol A technique (see Foissner, W. Europ. J. Protistol., 27:313-330;1991).Brightfield.
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