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Operculodinium bellulum
From Fensome et al., 2019:
Operculodinium bellulum Islam, 1983a, p.241, pl.2, fig.6. Holotype: Islam, 1983a, pl.2, fig.6. Age: Early Eocene.
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Locus typicus: Isle of Sheppey, SE England
Stratum typicum: Early Eocene
Original diagnosis: Islam, 1983, p.241
The cyst is ellipsoidal to subsphaerical, skolochorate and biphragmal; the endophragm is reticulate and the periphragm is psilate to faintly chagrinate; possesses numerous nontabular processes which are a quarter or under mean cyst diameter in length, hollow, little broader at bases, distally acuminate or aculeate closed at both ends; the archeopyle is precingular type P.
Dimensions: Holotype: cyst body 30 X 26 µm length of processes 6-7 µm. Rangc: cyst length 34(31)29 µm, breadth 31(28)26 µm, length of processes 5-9 µm - Specimens measured 10.
Affinities:
Islam, 1983, p.241: It differs from other species of the genus particularly from O. centrocarpum (Deflandre and Cookson) in general morphology and smaller size.
Operculodinium bellulum Islam, 1983a, p.241, pl.2, fig.6. Holotype: Islam, 1983a, pl.2, fig.6. Age: Early Eocene.
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Locus typicus: Isle of Sheppey, SE England
Stratum typicum: Early Eocene
Original diagnosis: Islam, 1983, p.241
The cyst is ellipsoidal to subsphaerical, skolochorate and biphragmal; the endophragm is reticulate and the periphragm is psilate to faintly chagrinate; possesses numerous nontabular processes which are a quarter or under mean cyst diameter in length, hollow, little broader at bases, distally acuminate or aculeate closed at both ends; the archeopyle is precingular type P.
Dimensions: Holotype: cyst body 30 X 26 µm length of processes 6-7 µm. Rangc: cyst length 34(31)29 µm, breadth 31(28)26 µm, length of processes 5-9 µm - Specimens measured 10.
Affinities:
Islam, 1983, p.241: It differs from other species of the genus particularly from O. centrocarpum (Deflandre and Cookson) in general morphology and smaller size.