Abstract
AbstractThe discovery that Aurelia polyps metamorphosing in sulfate‐free ASW failed to synthesize statoliths led to extensive investigations of statolith differentiation in these organisms. Radioautographic studies revealed that the sulfate and at least some of the calcium for statolith synthesis is incorporated into statoliths from the environmental medium early in the metamorphosis of each segment. Dissection procedures indicate that statolith synthesis is an in situ event. Sulfate‐deprivation also causes an inhibition of nematocyst differentiation and abnormal pulsing and swimming in ephyrae.The presence of sulfated acid mucopolysaccharides and of collagenous material at the site of statolith formation implies that these materials may be involved in calcium concentration in these organisms and that similar mechanisms may be involved in statolith synthesis in Aurelia as in bone and tooth development in higher animals.
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