"Abundance of Ceratolithus cristatus (WoRMS 235933) [Stage: heterococcolithophorid Subgroup: nishidae type] per unit volume of the water body by identification and counting by scanning electron microscopy (SEM)"@en . . "SDN:P01::ACE07979" . "Counts of a given biological entity using scanning electron microscopy normalised to a specified volume of fresh or salt water"@en . .