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Colonsaydinium
From Fensome et al., 2019:
Colonsaydinium, Hunt in Hunt et al., 1985, p.103.
Type: Hunt et al., 1985, pl.2, figs.4–5, as Colonsaydinium psilatum.
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Original description: [Hunt in Hunt et al., 1985]:
Diagnosis:
Proximate, cornucavate to circumcavate dinoflagellate cysts with a rounded peridinioid outline. Tabulation poorly delineated except for combination archaeopyle. Operculum free, probably plates 1-2i, 3-5".
Colonsaydinium, Hunt in Hunt et al., 1985, p.103.
Type: Hunt et al., 1985, pl.2, figs.4–5, as Colonsaydinium psilatum.
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Original description: [Hunt in Hunt et al., 1985]:
Diagnosis:
Proximate, cornucavate to circumcavate dinoflagellate cysts with a rounded peridinioid outline. Tabulation poorly delineated except for combination archaeopyle. Operculum free, probably plates 1-2i, 3-5".