No abstract available
MeSH terms
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Animals
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Echinodermata / physiology*
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Echinodermata / ultrastructure
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Feces / chemistry*
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Fossils
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Intestines / chemistry
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Intestines / physiology*
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Intestines / ultrastructure
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Iron / analysis*
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Silicates / analysis*
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Titanium / analysis*
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Zirconium / analysis*
Substances
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Silicates
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ilmenite
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zircon
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Zirconium
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Titanium
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Iron