File:EB1911 Sponges - Typical Siliceous Megascleres.jpg
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English: Typical siliceous megascleres:
a, Diactinal monaxon (oxeate). b, Style. c, Triact. d, Primitive tetraxon (calthrops). e, Hexact. f, Polyaxon desma. g, Sterraster (often regarded as a microsclere). h, Part of section of sterraster, showing two rays united by intervening silica. |
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| Date | published 1911 | |||
| Source | “Sponges,” Encyclopædia Britannica (11th ed.), v. 25, 1911, p. 722, fig. 26. | |||
| Author | After W. J. Sollas. | |||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:42, 2 October 2018 | | 742 × 503 (80 KB) | Bob Burkhardt (talk | contribs) | {{Information |description ={{en|1=Typical siliceous megascleres: ''a'', Diactinal monaxon (oxeate). ''b'', Style. ''c'', Triact. ''d'', Primitive tetraxon (calthrops). ''e'', Hexact. ''f'', Polyaxon desma. ''g'', Sterraster (often regarded as a microsclere). ''h'', Part of section of sterraster, showing two rays united by intervening silica. }} |date =published 1911 |source =“Sponges,” ''Encyclopædia Britannica'' (11th ed.), v. 25, 1911, p. 722, fig. 26.... |
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