Proximal and distal views of single coccoliths. This is a Palaeogene species, so not yet described in detail on this site.
Proximal and distal views of single coccoliths. This form is close to typical H. orientalis and has not been separated subsequently.
Schematic cross-sections, from Young et al. (2003): white R-units, dark grey V-units, light grey cross-over zone, circles - locus of proto-coccolith ring
Proximal and distal views of single coccoliths. This is a Palaeogene species, so not yet described in detail on this site.