Late Cretaceous (Campanian) organic-walled microplankton from the Interior Plains of Canada, Wyoming and Texas: validation of new taxa

Upper Cretaceous dinoflagellate cyst stratigraphy, onshore West Greenland

“…Upper Cretaceous dinoflagellate cyst assemblages from western Canada and western U.S.A. have been described by Stanley (1965), Wall & Singh (1975), Harland (1973Harland ( , 1977, Sweet & McIntyre (1988), Stone (1973), Harker et al (1990) and Kurita & McIntyre (1994). Nichols & Sweet (1993) described the biostratigraphy of the Upper Cretaceous non-marine palynofloras in a north-south transect of the Western Interior Basin.…”

“…lsabelidinium acuminatum has an early to 'middle' Campanian range in the Mackenzie Delta area (McIntyre, 1975). Harker et al (1990) recorded I. acuminatum from the earliest Campanian in the Western Interior, U.S.A. According to Costa & Davey (1992) I. acuminatum first occurs, or tirst becomes consistent in the early Campanian.…”

A review of the areoligeracean dinoflagellate cystCyclonepheliumand morphologically similar genera

“…Generally, palaeoecological studies of fossil dinoflagellate cysts have primarily focused on Cenozoic taxa. But several authors -including Lister & Batten (1988), Cornu & Monteil in Monteil (1990), Harker et al (1990), Kirsch (1991), Marheinecke (1992), Masure & Vrielynck (2009), Masure et al (2013) and Pearce et al (2003) Major advances in our knowledge of the palaeogeography of Cretaceous dinoflagellate cysts resulted from Masure & Vrielynck (2009) and Masure et al (2013). In a study of worldwide distribution patterns of late Albian dinoflagellate cysts, Masure & Vrielynck (2009) considered two species -Cyclonephelium chabaca (which we treat as a taxonomic junior synonym of Canningia reticulata) and Cyclonephelium (now Aptea) vannophorum, to be indicative of warmer waters.…”

“…Senoniasphaera protrusa was included in group F, which they considered indicative of relatively normal marine conditions. Our conclusions from the above is that subgroup B1 and group F are probably indicative of inner neritic palaeoenvironments Harker et al (1990). also used Q-mode analysis to define 14 groups and several subgroups, of which subgroup 9B contained Circulodinium (as Cyclonephelium) distinctum.…”

Palynology of the Cenomanian Raha Formation, Gulf of Suez, Egypt: Biostratigraphical, palaeoenvironmental and palaeobiogeographical implications

“…Both the composition of POM and its distribution are controlled by the influence of ecological and sedimentological processes within the physical environment. The compositional change of POM indicates significant information for palaeoenvironmental interpretation in terms of transgressive-regressive trends and relative sea-level changes (Harker et al, 1990;Tyson, 1995;Batten, 1996;Pittet and Gorin, 1997;Tahoun and Deaf, 2016;Mansour et al, 2018). The POM group is the product of compiling various factors (i.e.…”