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Astrocysta
From Fensome et al., 2019:
Astrocysta, Davey, 1970, p.359.
Taxonomic senior synonym: Palaeoperidinium, according to Lentin and Williams (1976, p.150).
This name was not validly published in Sarjeant (1967b, p.243), since no description was given.
Type: Pocock, 1962, pl.14, fig.219, as Palaeoperidinium cretaceum.
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Original description: [Davey, 1970]:
Diagnosis:
Proximate cyst of pentagonal shape, composed of two layers, typically in contact. One apical and two antapical horns. Tabulation lightly marked, peridinoid. Cingulum cingular and archaeopyle, when seen, intercalary.
Astrocysta, Davey, 1970, p.359.
Taxonomic senior synonym: Palaeoperidinium, according to Lentin and Williams (1976, p.150).
This name was not validly published in Sarjeant (1967b, p.243), since no description was given.
Type: Pocock, 1962, pl.14, fig.219, as Palaeoperidinium cretaceum.
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Original description: [Davey, 1970]:
Diagnosis:
Proximate cyst of pentagonal shape, composed of two layers, typically in contact. One apical and two antapical horns. Tabulation lightly marked, peridinoid. Cingulum cingular and archaeopyle, when seen, intercalary.