» Calcareous Nannofossils    Information on these organisms including their fossil record, classification, biology and life cycle with a number of images of individual species.    http://www.ucl.ac.uk/GeolSci/micropal/calcnanno.html

» Coccolithophore    Information from Wikipedia on these single-celled algae which form part of the phytoplankton.    http://en.wikipedia.org/wiki/Coccolithophore

» Haptophyte    Information from Wikipedia on these single celled green algae which are some of the most abundant marine phytoplankton, especially in the open ocean and are plentiful as microfossils.    http://en.wikipedia.org/wiki/Haptophyte