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Cleistosphaeridium granulatum
From Fensome et al., 2019:
Cleistosphaeridium granulatum Burger, 1980a, p.77, pl.33, figs.2–4,6–10. Holotype: Burger, 1980a, pl.33, fig.2; Fauconnier and Masure, 2004, pl.49, figs.3–4. NOW Impletosphaeridium. Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium. Age: Albian.
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Original description: [Burger, 1980]:
Description:
Cyst spherical, dehisced cyst cup-shaped.
Archaeopyle, if formed, medium to large, apical, outline circular; margin almost smooth or undulate.
Cyst wall single-layered, granulate, and covered with about 100 thin, solid, slightly tapering and frequently curved spines 2-8 µm high, with acuminate tips.
No parasuture pattern is apparent from the distribution of the processes.
Dimensions:
Width (16 specimens) 27-62 µm.
Comments:
This species is distinguished by its granulate cyst wall and the relatively small number of short, curved spines. C. aciculare Davey, 1969, has longer and thicker processes and a thicker wall.
Cleistosphaeridium granulatum Burger, 1980a, p.77, pl.33, figs.2–4,6–10. Holotype: Burger, 1980a, pl.33, fig.2; Fauconnier and Masure, 2004, pl.49, figs.3–4. NOW Impletosphaeridium. Originally Cleistosphaeridium, subsequently (and now) Impletosphaeridium. Age: Albian.
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Original description: [Burger, 1980]:
Description:
Cyst spherical, dehisced cyst cup-shaped.
Archaeopyle, if formed, medium to large, apical, outline circular; margin almost smooth or undulate.
Cyst wall single-layered, granulate, and covered with about 100 thin, solid, slightly tapering and frequently curved spines 2-8 µm high, with acuminate tips.
No parasuture pattern is apparent from the distribution of the processes.
Dimensions:
Width (16 specimens) 27-62 µm.
Comments:
This species is distinguished by its granulate cyst wall and the relatively small number of short, curved spines. C. aciculare Davey, 1969, has longer and thicker processes and a thicker wall.