The phylum Porifera (sponges; “pore bearing) is divided into three classes, Hexactinellida, Demospongiae, and Calcarea. Calcarea is the oddball of the group, building skeletal elements out of calcium ...
April 26 (UPI) --New research suggests ocean sponges aren't as sedentary as once thought. Recent surveys of the Arctic seabed revealed trails of light brown sponge spicules, needle-like support ...
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THE spicule-less sponge, Oscarella lobularis, is an interesting form found on our shores and elsewhere, and presents a wide range of colour variation. Topsent (Arch. de Zool. Exp. et Gén. 3, iii., ...
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