Operational taxonomy and (paleo-)autecology of round, brown, spiny dinoflagellate cysts from the Quaternary of high northern latitudes

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doi: 10.1016/j.marmicro.2012.11.001
Author(s): Radi, Taoufik; Bonnet, Sophie; Cormier, Marc-André; de Vernal, Anne; Durantou, Lise; Faubert, Étienne; Head, Martin J.; Henry, Maryse; Pospelova, Vera; Rochon, André; van Nieuwenhove, Nicolas
Author Affiliation(s): Primary:
McGill University, Earth and Planetary Sciences, Montreal, QC, Canada
Université du Québec à Montréal, Canada
Université du Québec à Rimouski, Canada
Brock University, Canada
University of Victoria, Canada
Volume Title: Marine Micropaleontology
Source: Marine Micropaleontology, Vol.98, p.41-57. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0377-8398 CODEN: MAMIDH
Note: In English. 88 refs.; illus., incl. 3 plates, 3 tables, sketch map
Summary: Round brown spiny dinoflagellate cysts from high latitudes of the Northern Hemisphere have been examined in order to define criteria for their determination during routine counts. The round brown spiny cysts belong to several taxa including the paleontological genera Echinidinium and Islandinium and the biological genera Oblea, Polykrikos, and Protoperidinium. Here, we present a synthesis of descriptions with remarks on the morphology, taxonomy, nomenclature and ecology of cysts from the observations of samples collected in high latitude environments. These observations have led us to establish a practical identification key based on the most distinct morphological features that characterize all specimens. These features exclude the archeopyle, which is rarely observed. Two new cyst types are described from Holocene and Pleistocene sediments of the North Pacific and North Atlantic oceans, respectively. The identification key permits the following to be distinguished: "Echinidinium aculeatum", Echinidinium delicatum, Echinidinium granulatum, Echinidinium karaense, Echinidinium sleipnerensis, Echinidinium "transparantum"/zonneveldiae, Islandinium brevispinosum, Islandinium? cezare, and Islandinium minutum, the cysts of Oblea acanthocysta and Polykrikos hartmannii (al. Pheopolykrikos hartmannii), and the new cyst types Echinidinium? sp. A and Echinidinium? sp. B. Abstract Copyright (2013) Elsevier, B.V.
Year of Publication: 2013
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 09 Paleontology, Paleobotany; Arctic Ocean; Atlantic Ocean; Bering Sea; Cenozoic; Dinoflagellata; Echinidinium; Expedition 303; Expedition 323; Expeditions 303/306; Holocene; IODP Site U1305; IODP Site U1345; Identification; Integrated Ocean Drilling Program; Islandinium; Microfossils; Morphology; North Atlantic; North Pacific; Northwest Atlantic; Norwegian Sea; Oblea acanthocysta; Pacific Ocean; Paleoecology; Palynomorphs; Peridiniales; Pleistocene; Polykrikos hartmannii; Protoperidinium; Quaternary; Taxonomy; Upper Pleistocene
Coordinates: N572800 N572900 W0483200 W0483200
N600913 N600913 W1792813 W1792813
Record ID: 2013033819
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands