cfr. mesostigmata, portrait
Chroomonas (crow-owe-moan-ass) is one of the cryptomonad flagellates with blue-green plastids. The inclusions are mostly polysaccharide (starch) storage. Two flagella are visible at top (anterior) and the cell surface is irregular because of the small skeletal plates that lie under the cell membrane. With posterior pyrenoid. This may be Chroomonas mesostigmata. Differential Interference Contrast.  data on this strain. This image is of material from Provasoli-Guillard National Center for Culture of Marine Phytoplankton, images taken by David Patterson and Bob Andersen. Image copyright: Bob Andersen and D. J. Patterson, image used under license to MBL (micro*scope).
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Chroomonas
From the collection
Provasoli-Guillard National Center for Culture of Marine Phytoplankton (CCMP)
| Description of Chroomonas: Cryptomonad flagellates, cells subovate and lack a furrow. Subequal flagella with typical hairs inserted dorso-ventrally on the right side of the cell. Cells lack a furrow but a tubular gullet extends posteriorly from the vestibulum. The inner and outer components of the peri-plast consist of offset retangular plates with the anterior edges raised due to rows of intramembrane particles in the cell membrane adhering tightly to the plates in the posterior end of each plate. Scales or fibrils may be part of the superficial component in some species. The peri-plastidial compartment contains a single chloroplast with a pyrenoid and a nucleomorph, which is usually located near the pyrenoid. The golgi apparatus and contractile vacuole if present are anterior, while the nucleus is posterior. Cells are blue-green due to the Cr-phycocyanin 645 or 630 in the chloroplasts. Some species have a stigma. Freshwater and marine |
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