Description
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 periplast consist of offset retangular plates (Hi II , 1990) 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 (in freshwater species) 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 (Antia et al. , 1973; Dodge, 1969; Gantt , 1971 ; Hill , 1990 ; Kugrebs and Lee , 1987 ; Kugrens et al. , 1986 ; Meyer and Pienaar , 1984) . IDA (From Kugrens et al. , 1986)
Type species
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Raw text
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 periplast consist of offset retangular plates (Hi II , 1990) 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 (in freshwater species) 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 (Antia et al. , 1973; Dodge, 1969; Gantt , 1971 ; Hill , 1990 ; Kugrebs and Lee , 1987 ; Kugrens et al. , 1986 ; Meyer and Pienaar , 1984) . IDA (From Kugrens et al. , 1986)