anterior
Chasmostoma (kas-moe-stow-ma) a very rarely reported euglenid flagellate, with one long emergent flagellum projecting in front of the cell. Unusually, has a cavity at the front of the cell into which the flagellum can be withdrawn. Phase contrast micrograph. This picture was taken by David Patterson of material from Limulus-ridden sediments at Plum Island (Massachusetts USA) in spring and summer, 2001. Image copyright: D. J. Patterson, image used under license to MBL (micro*scope).
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Chasmostoma nieuportense
From the collection
Plum Island, Massachusetts coast, USA
| Description of Chasmostoma nieuportense: Heterotrophic euglenid cells which are about 56 microns long when fully extended, and are highly metabolic with rounded cross-sectional profile of cell body and with fine striations. One flagellum arises within a reservoir, extends along a flagellar canal and then passes through a wide cavity that makes up most of the anterior part of the cell. When the cells are jarred, the flagellum is withdrawn into the cavity and then after few seconds, it emerges again. With an ingestion organelle which has two short rods. The nucleus is located in the posterior part of the cell. |
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