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Lingulodinium pugiatum
From Fensome et al., 2019:
Lingulodinium pugiatum (Drugg, 1970b, p.819; text-figs.16D–E) Wall and Dale in Wall et al., 1973, p.24. Holotype: Drugg, 1970b, text-fig.16E. Originally Operculodinium, subsequently (and now) Lingulodinium. Age: Oligocene.
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Locus typicus: Hinds County, Mississippi, USA
Stratum typicum: Oligocene
Original description: Drugg, 1970, p. 819: Operculodinium pugiatum
Spherical tract, precingular archeopyle, wall thin and finely granulate. Numerous processes, dagger-shaped in outline, closed proximally and distally. The process walls are thin and smooth. The length of the processes is about 12 to 15 µm although a few short ones are sometimes interspersed with the normal ones on the ventral side. The tract diameter ranges from 48 to 68 µm.
Affinities:
Drugg, 1970, p. 819: Operculodinium pugiatum
Operculodinium pugiatum most closely resembles Lingulodinium machaerophorum (Deflandre and Cookson) Wall, 1967, but differs in the mode of archeopyle formation.
Lingulodinium pugiatum (Drugg, 1970b, p.819; text-figs.16D–E) Wall and Dale in Wall et al., 1973, p.24. Holotype: Drugg, 1970b, text-fig.16E. Originally Operculodinium, subsequently (and now) Lingulodinium. Age: Oligocene.
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Locus typicus: Hinds County, Mississippi, USA
Stratum typicum: Oligocene
Original description: Drugg, 1970, p. 819: Operculodinium pugiatum
Spherical tract, precingular archeopyle, wall thin and finely granulate. Numerous processes, dagger-shaped in outline, closed proximally and distally. The process walls are thin and smooth. The length of the processes is about 12 to 15 µm although a few short ones are sometimes interspersed with the normal ones on the ventral side. The tract diameter ranges from 48 to 68 µm.
Affinities:
Drugg, 1970, p. 819: Operculodinium pugiatum
Operculodinium pugiatum most closely resembles Lingulodinium machaerophorum (Deflandre and Cookson) Wall, 1967, but differs in the mode of archeopyle formation.