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File:Britannica Echinoderma 3.jpg
Da Wikipedia, l'enciclopedia libera
Found in articles
File:Britannica Echinoderma 3.jpg
Description
Britannica
Echinoderma
3
.
jpg
English: Supposed calycinal systems of free-moving Echinoderms. A, regular sea-urchin (Cidaris); B, sea-urchin
File:Britannica Echinoderma 19.jpg
Description
Britannica
Echinoderma
19.
jpg
English: Denuded tests of some fossil Echinoids. Date 1911 Source Encyclopædia
Britannica
, 1911 Author Encyclopædia
File:Britannica Echinoderma 16 tagged.png
Description
Britannica
Echinoderma
16 tagged.png English: Section across the arm-skeleton of a Phanerozonate Asterid, Astropecten. 1, Dorsal plates with