File:EB1911 Endospora - Bertramia Asperospora.jpg
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Summary
| Description |
English: Bertramia Asperospora (Fritsch) from the body-cavity of Brachionus. × 1040.
a, Young form with opaque, evenly-granulated protoplasm and few refringent granules; the nuclei (n) are small, and appear to be surrounded each by a clear space. b and c, Full-grown specimens with large nuclei and clearer protoplasm, containing numerous refringent granules (r. gr.). d and e, Morula stages, derived from b and c by division of the body into segments centred round the nuclei, each cell so formed being a spore. Between the spores a certain amount of intercellular substance or residual protoplasm is left, in which the refringent granules seem to be embedded. The morula may break up forthwith and scatter the spores, or may first round itself off and form a spherical cyst with a tough, fairly thick wall. f, Empty, slightly shrunken cyst, from which the spores have escaped. g, Free spore or youngest unicellular trophozoite. h, i, j, Commencing growth of the trophozoite, with multiplication of the nuclei, which results ultimately in forms such as a and b. |
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| Date | published 1911 | |||
| Source | “Endospora,” Encyclopædia Britannica (11th ed.), v. 9, 1911, p. 388, fig. 14. | |||
| Author | From Minchin, in Lankester’s Treatise on Zoology, vol. Protozoa. | |||
| Permission (Reusing this file) |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 17:01, 4 September 2018 | | 873 × 796 (164 KB) | Bob Burkhardt | {{Information |description ={{en|1=''Bertramia Asperospora'' (Fritsch) from the body-cavity of ''Brachionus''. × 1040. ''a'', Young form with opaque, evenly-granulated protoplasm and few refringent granules; the nuclei (''n'') are small, and appear to be surrounded each by a clear space. ''b'' and ''c'', Full-grown specimens with large nuclei and clearer protoplasm, containing numerous refringent granules (''r. gr.''). ''d'' and ''e'', Morula stages, derived from ''b'' and ''c'' by divis... |
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