Supplement to: Chepstow-Lusty, Alex J; Backman, Jan; Shackleton, Nicholas J (1989): Comparison of Upper Pliocene discoaster abundance variations from North Atlantic Sites 552, 607, 658, 659, and 662: further evidence for marine plankton responding to orbital forcing. In: Ruddiman, W; Sarnthein, M; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 108, 121-141, https://doi.org/10.2973/odp.proc.sr.108.122.1989