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Batiacasphaera cassiculus
From Fensome et al., 2019:
Batiacasphaera cassicula Wilson, 1988, p.14; pl.2, figs.5–6. Holotype: Wilson, 1988, pl.2, fig.5; Fensome et al., 1996, fig.1 —p.2083. NIA. Age: Middle Eocene.
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Original description: [Wilson, 1988, p. 14]:
Description:
Relatively large subspherical or lenticular Batiacasphaera with characteristic reticulate surface and thick autophragm (up to 4µm). Reticulum variable with thick muri separating the lumen; diameter of lumen rarely exceeds 3 µm.
Archeopyle large with broadly zig-zag margin; operculum generally free, occasionally remains in place.
No indications of paratabulation, paracingulum, parasulcus, or other surface ornament.
Dimensions:
Holotype: length 84 µm, breadth 84 µm. Range: diameter 73(85)93 µm (n= 10).
Affinities:
The species differs from Batiacasphaera reticulata Davey (1969) in being substantially larger and in having a much more pronounced reticulation.
Batiacasphaera cassicula Wilson, 1988, p.14; pl.2, figs.5–6. Holotype: Wilson, 1988, pl.2, fig.5; Fensome et al., 1996, fig.1 —p.2083. NIA. Age: Middle Eocene.
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Original description: [Wilson, 1988, p. 14]:
Description:
Relatively large subspherical or lenticular Batiacasphaera with characteristic reticulate surface and thick autophragm (up to 4µm). Reticulum variable with thick muri separating the lumen; diameter of lumen rarely exceeds 3 µm.
Archeopyle large with broadly zig-zag margin; operculum generally free, occasionally remains in place.
No indications of paratabulation, paracingulum, parasulcus, or other surface ornament.
Dimensions:
Holotype: length 84 µm, breadth 84 µm. Range: diameter 73(85)93 µm (n= 10).
Affinities:
The species differs from Batiacasphaera reticulata Davey (1969) in being substantially larger and in having a much more pronounced reticulation.