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From Wikimedia Commons, the free media repository. File information. Structured data. Captions English Add a one-line explanation of what this file represents. Description Porifera Types-fr. Author Ewan ar Born. This image was improved or created by the Wikigraphists of the Graphic Lab fr. You can propose images to clean up, improve, create or translate as well. I, the copyright holder of this work, hereby publish it under the following licenses:.

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Vacelet Jean. Depth indications given by the Sponges in modern benthic environments. In Recent sponges, few taxa or morphofonctional adaptations provide precise depth indications. The vertical distribution of the diverse classes is analyzed, with special attention to forms that have a rigid calcareous or siliceous skeleton able to fossilize. These forms belong to polyphyletic groups. At the present time, they are highly scia-philous and live in warm or temperate waters.


cnidaire, spongiaire

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Painvin G J

C'est un organisme colonial dont le premier stade est la coalescence de cellules individuelles. Elle intrigue depuis longtemps les biologistes [ 10 ]. On estime parfois qu'elle a besoin d'un substrat dur, mais S. S lacustris se reproduirait moins par voie sexuelle que S. Harrison, F. Morphological and cytochemical patterns during early stages of reduction body formation in Spongilla lacustris Porifera: Spongillidae.

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