- International Nannoplankton Association (INA) - - Semi-formal association of scientists worldwide who have an interest in living or fossil nannoplankton - including coccolithophores, nannoliths, and other nannofossils such as silicoflagellates and calcispheres.
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- The Pander Society - - An international association of palaeontologists and stratigraphers with a common interest in the study of conodonts.
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