Back
Astrocysta
From Williams et al., 2017:
[Astrocysta, Davey, 1970, p. 359
Type species: originally as Palaeoperidinium cretaceum, Pocock, 1962 (pl.14, fig.219)] ; Astrocysta cretacea, Davey, 1970
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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
Type species: originally as Palaeoperidinium cretaceum, Pocock, 1962 (pl.14, fig.219)] ; Astrocysta cretacea, Davey, 1970
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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.