HERVE CONGE,ISM / SCIENCE PHOTO LIBRARY HERVE CONGE,ISM / SCIENCE PHOTO LIBRARY
Fossil nummulite shell (Nummulites sp.). This extinct foraminiferan protist inhabited deep marine waters. It dates from the transition between the Eocene and Palaeocene epochs, during which a sudden rise in global temperature led to the mass extinction of many species of bottom-dwelling protists. This specimen measures 22 millimetres in diameter. It is from deposits in Egypt.
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