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The dinoflagellate cyst genera Achomosphaera Evitt 1963 and Spiniferites Mantell 1850 in Pliocene to modern sediments: a summary
of round table discussions; Mertens, K N; Van Nieuwenhove, N; Gurdebeke, P R; Aydin, H; Bogus, K; Bringue, M; Dale, B; De
Schepper, S; de Vernal, A; Ellegaard, M; Grothe, A; Gu, H F; Head, M J; Heikkila, M; Limoges, A; Londeix, L; Louwye, S; Marret, F;
Masure, E; Matsuoka, K; Mudie, P J; Penaud, A; Pospelova, V; Price, A M; Ribeiro, S; Rochon, A; Sangiorgi, F; Schreck, M; Torres, V;
Uzar, S; Versteegh, G J M; Warny, S; Zonneveld, K. Palynology vol. 42, 1, 2018 p. 10-44,
https://doi.org/10.1080/01916122.2018.1465739 
Open Access
(NRCan Cont.# 20200267)