We are in the process of adding extant coccolithophores tothe nannotax system. The plan is that the content will be based on Young et al. (2003) "A Guide to Extant Coccolithophore Taxonomy" but with more images, extended details and comprehensive updating. At present, however, all that is in place is the taxonomic framework. However, through the wonders of the internet this is actually still useful since content from other sites is automatically integrated into the pages.
Jeremy Young, May 2012