New Zealand (Struthiolaria) Shell Fossil

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This is a nice specimen of the "ostrich foot shells", family Struthiolariidae, which are almost entirely limited to New Zealand. They display a long, complicated history of evolution and extinction, with more than 35 species occurring as fossils over more than 40 million years, and yet only two species still live here now - Struthiolaria papulosa and Pelicaria vermis.

Struthiolaria frazeri provides a clear example of extinction, as it is a key fossil for identifying the end of the Nukumaruan Stage, becoming extinct suddenly 1.6 million years ago, at a cooling spell.

Length: 35mm
Width: 30mm
Height: 25mm
Weight: 26g