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Oligosphaeridium totum ssp. minus
From Fensome et al., 2019:
Oligosphaeridium totum ssp. minus (Brideaux, 1971, p.88–89, pl.25, figs.54,57) Lentin and Williams, 1973, p.100. Holotype: Brideaux, 1971, pl.25, fig.57. Originally Oligosphaeridium totum var. minus, subsequently (and now)
Oligosphaeridium totum subsp. minus. Age: late Albian.
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Original description (Holotype): Brideaux, 1971, p.88-89
Length, 28 µm; width, 25 µm. Cyst body subcircular; complete specimen with 18 processes; process length 10--14 µm, basal width 2--5 µm; one process smaller, interpreted as corresponding to a sulcul process. Columns of process nearly tubular, apices flaring and buccinate, entire-margined, open.
Description: Brideaux, 1971, p. 89
Cyst body nearly circular in apical view, ovoid to subcircular in lateral view. Wall thin, scabrate, two-layered, the outer layer giving rise to tubular processes with flaring, open, entire-margined apices, corresponding in position to a reflected tabulation scheme of 4', 6", 0c, 5-?6''', 1p, 1'''', 1s, the sulcul process smaller. Archeopyle apical, approximately hexagonal in outline, the operculum bearing 4 apical processes.
Dimensions: Cyst length on 8 measured specimens, 26-38 µm; cyst width on 6 measured specimens, 17-31 µm; length of processes on 12 specimens, 4-16 µm; width of processes on 8 specimens, 1-11 µm. Total of 17 specimens recovered.
Affinities:
Brideaux, 1971, p. 89: The process on this form are always smaller than Oligosphaeridium totum var. totum and the cyst body is generally smaller.
Oligosphaeridium totum ssp. minus (Brideaux, 1971, p.88–89, pl.25, figs.54,57) Lentin and Williams, 1973, p.100. Holotype: Brideaux, 1971, pl.25, fig.57. Originally Oligosphaeridium totum var. minus, subsequently (and now)
Oligosphaeridium totum subsp. minus. Age: late Albian.
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Original description (Holotype): Brideaux, 1971, p.88-89
Length, 28 µm; width, 25 µm. Cyst body subcircular; complete specimen with 18 processes; process length 10--14 µm, basal width 2--5 µm; one process smaller, interpreted as corresponding to a sulcul process. Columns of process nearly tubular, apices flaring and buccinate, entire-margined, open.
Description: Brideaux, 1971, p. 89
Cyst body nearly circular in apical view, ovoid to subcircular in lateral view. Wall thin, scabrate, two-layered, the outer layer giving rise to tubular processes with flaring, open, entire-margined apices, corresponding in position to a reflected tabulation scheme of 4', 6", 0c, 5-?6''', 1p, 1'''', 1s, the sulcul process smaller. Archeopyle apical, approximately hexagonal in outline, the operculum bearing 4 apical processes.
Dimensions: Cyst length on 8 measured specimens, 26-38 µm; cyst width on 6 measured specimens, 17-31 µm; length of processes on 12 specimens, 4-16 µm; width of processes on 8 specimens, 1-11 µm. Total of 17 specimens recovered.
Affinities:
Brideaux, 1971, p. 89: The process on this form are always smaller than Oligosphaeridium totum var. totum and the cyst body is generally smaller.