Abstract
Radular teeth of a neolepetopsid patellogastropod limpet, Paralepetopsis ferrugivora, from a deep-sea hydrothermal vent site have similar elemental composition (O, Si, P, S, Cl, K and Fe) to radular teeth of the shallow-waters patellogastropod limpets. However, in contrast to shallow waters limpets, the fully mature teeth of P. ferrugivora do not show any crystalline phases. Amorphous silica was found in the cusp of the teeth and amorphous iron oxide in the junction zone and base of the teeth. Ferritin-rich vesicles were observed in cells adjacent to the junction zone of the early mature teeth, suggesting that these vesicles can mediate the delivery of iron to the tooth matrix. The similarity in the elemental composition between the hydrothermal limpet P. ferrugivora and shallow-waters patellogastropod limpets shows that the extreme hydrothermal environment did not alter the elemental composition of the radular teeth in the deep-sea species.
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