Description
Flagella with small square scales in 2 4 longitudinal rows , overlain by 9 rows of limuloid ones. bLM 1. Flagella absent (Phycoma stage) .. .... .... .... .... .. .. 2 1·. Flagella present .. .. .. .. ............ ........ .... .. .. .......... . 3 2. Cells up to 230 11m in diameter, with one or more wings ... .. ........ .. .... .. ... ..... .. Pterosperma 2 ' . Cells without wings, up to 800 11m in diameter ...... ..... .... ... ... .... .. ... .. ............ .. .. .... Halosphaera 3. Cells rad ially symmetrical .. .... .... ...... .... .... .. .. .. . 4 3 ·. Cells bilaterally symmetrical .. .. .. .. .. .. .. .... .... .... 5 4 With one pyrenoid posteriorly (2 in a 16-flagellate species) .. ........ ... .. Pyramimonas 4 ·. With two or four pyrenoids halfway along the cell. .. ... .. ... ... ... ... .. .. .. ................. ... Halosphaera 5. With four posterior flagella , eyespot absent. .. .. ... ......... ... ..... .... .......... .. ... .. .... ... Pterosperma 5 '. With four anterior flagella , more rapid swimm ing with the flagella posteriorly may also occur eye spot present. ... ... .. ......... Cymbomonas s v ~'"t-:iiN/-.,~..1/. body scales; FSI , FSO, flag ellar scal es ; C, chloroplast , E, eyespot; FV , food vacuole ; G, Golgi body; M , mitochondrion ; N, nucleus; P, pyrenoid; SS, starch grains ; SV, scale vesicl es. Not to scale. (Fro m Thondsen, 1988).
Type species
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Raw text
Flagella with small square scales in 2 4 longitudinal rows , overlain by 9 rows of limuloid ones. bLM 1. Flagella absent (Phycoma stage) .. .... .... .... .... .. .. 2 1·. Flagella present .. .. .. .. ............ ........ .... .. .. .......... . 3 2. Cells up to 230 11m in diameter, with one or more wings ... .. ........ .. .... .. ... ..... .. Pterosperma 2 ' . Cells without wings, up to 800 11m in diameter ...... ..... .... ... ... .... .. ... .. ............ .. .. .... Halosphaera 3. Cells rad ially symmetrical .. .... .... ...... .... .... .. .. .. . 4 3 ·. Cells bilaterally symmetrical .. .. .. .. .. .. .. .... .... .... 5 4 With one pyrenoid posteriorly (2 in a 16-flagellate species) .. ........ ... .. Pyramimonas 4 ·. With two or four pyrenoids halfway along the cell. .. ... .. ... ... ... ... .. .. .. ................. ... Halosphaera 5. With four posterior flagella , eyespot absent. .. .. ... ......... ... ..... .... .......... .. ... .. .... ... Pterosperma 5 '. With four anterior flagella , more rapid swimm ing with the flagella posteriorly may also occur eye spot present. ... ... .. ......... Cymbomonas s v ~'"t-:iiN/-.,~..1/. body scales; FSI , FSO, flag ellar scal es ; C, chloroplast , E, eyespot; FV , food vacuole ; G, Golgi body; M , mitochondrion ; N, nucleus; P, pyrenoid; SS, starch grains ; SV, scale vesicl es. Not to scale. (Fro m Thondsen, 1988).