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Hemisphaeridium fenestratum
From Fensome et al., 2019:
Hemisphaeridium fenestratum Bujak in Bujak et al., 1980, p.56,58, pl.15, figs.7–9. Holotype: Bujak et al., 1980, pl.15, fig.7; Fensome et al., 1993a, fig.1 — p.1187. Age: Middle Eocene (see Aubry, 1986).
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Origial diagnosis: Bujak in Bujak et al., 1980, p. 56
Chorate cysts with an ovoidal to ellipsoidal central body that is longer than broad.
Periphragm smooth to chagrinate. Numerous processes are arranged in process complexes. Process complexes annulate or soleate with four to nine processes on the apical, precingular, postcingular, antapical, posterior intercalary, and posterior sulcal paraplates; additional processes are sometimes present within the complexes. The paracingular process complexes are linear, with two or three processes in each complex. The processes are slender, tubiform and distally open, expanded, and aculeate, the aculei of processes within a complex joining to form a reticulate network reflecting the paraplate shape. Paratabulation 4', 6", 6c, 6''', Ip, 1'''', Ip.s., with process complexes on all of the paraplates.
Archaeopyle epicystal, formed by the detachment of the apical and precingular paraplates. Dimensions. Central body length = 45-47 µm, breadth = 27-41 µm. Maximum process length = 11-19 µm.
Hemisphaeridium fenestratum Bujak in Bujak et al., 1980, p.56,58, pl.15, figs.7–9. Holotype: Bujak et al., 1980, pl.15, fig.7; Fensome et al., 1993a, fig.1 — p.1187. Age: Middle Eocene (see Aubry, 1986).
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Origial diagnosis: Bujak in Bujak et al., 1980, p. 56
Chorate cysts with an ovoidal to ellipsoidal central body that is longer than broad.
Periphragm smooth to chagrinate. Numerous processes are arranged in process complexes. Process complexes annulate or soleate with four to nine processes on the apical, precingular, postcingular, antapical, posterior intercalary, and posterior sulcal paraplates; additional processes are sometimes present within the complexes. The paracingular process complexes are linear, with two or three processes in each complex. The processes are slender, tubiform and distally open, expanded, and aculeate, the aculei of processes within a complex joining to form a reticulate network reflecting the paraplate shape. Paratabulation 4', 6", 6c, 6''', Ip, 1'''', Ip.s., with process complexes on all of the paraplates.
Archaeopyle epicystal, formed by the detachment of the apical and precingular paraplates. Dimensions. Central body length = 45-47 µm, breadth = 27-41 µm. Maximum process length = 11-19 µm.