A fossilised piece of Dentalium Otamaringaense, collected from the mouth of the Urenui River in 1929. The fossil is a ridged white shell with a plug of darker material in its centre. The white shell is wrapped with a piece of grey material which looks a little like concrete.
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This fossil is between 15 and 20 million years old. Taranaki's coastline is very rich in fossils, and similar examples to this one can be found in the National Paleontological collection.