Synthesis of silicoflagellate stratigraphy for maestrichtian to quaternary marine sediment

Cosmopolitan and low-latitude silicoflagellate distributions determined from Deep Sea Drilling Project cores are synthesized into a sequence of 23 biostratigraphic zones and subzones for tropical and subtropical ocean areas. The stratigraphic relation of major morphologic changes in silicoflagellates from all areas is summarized. Two new Neogene subzones, one new Paleogene subzone, one new species, and one new variety are defined: Dictyocha perlaevis ornata Subzone, Dictyocha neonautica Subzone, Distephanus speculum haliomma Subzone, Dictyocha neonautica Bukry, n. sp., and D. neonautica var. cocosensis Bukry, n. var.