portrait
Geminigera (gem-in-idge-err-a) is a cryptomonad flagellate. As with other cryptomonads, the two flagella insert into a groove or pocket which extends a short way into the cell. The pocket is lined with extrusiible bodies called ejectisomes. With reddy-coloured plastids. DIfferential interference microscopy. This image was taken by Dawn Moran and David Patterson from cultures and samples collected from the Ross Sea in Antarctica by Rebecca Gast. Image copyright: Dawn Moran and D. J. Patterson, image used under license to MBL (micro*scope).
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Geminigera
From the collection
Ross Sea, Antarctica
| Description of Geminigera: Cryptomonad flagellates, cells are laterally compressed; a medium length furrow extends posteriorly from the vestibulum and a short sac-like gullet is posterior to the furrow; the periplast consists of an inner sheet and a surface component of imbricate heptagonal scales and a fibrillar layer. The periplastidial compartment contains a single, somewhat lobed, peripheral chloroplast with two stalked kidney-shaped pyrenoids not traversed by thylakoids, with the thylakoids in the chloroplast arranged singly or stacked in variable numbers, and a nucleomorph located in a tongue of periplastidial cytoplasm in an ivagination of the nucleus. Chloroplast contains biliprotein Cr-phycoerythrin 545; reported only from marine habitats. |
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