Placorhombus ziveriae Young & Geisen in Young et al., 2003
References
Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I., Ostergaard, J. B., 2003. A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research, Special Issue 1, 1-132.