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Sanshuia minuta
Sanshuia minuta (Jiabo, 1978) Lentin and Williams, 1985
Now Saeptodinium. Originally Deflandrea, subsequently Sanshuia, thirdly Geiselodinium, fourthly (and now) Saeptodinium. This combination was not validly
published in Yu Jingxian et al., 1981, who did not fully reference the basionym. Holotype: Jiabo, 1978, pl.3, fig.11
Age: Early Tertiary
Description: Outline subcircular or tripodal. Periphragm fairly thin. Endocyst subcircular or indistinct when present. Surface smooth, granulate or sparsely spinose. Upper test in shape of reversed funnel. Apical horn extends out conspicuously and has conical shape; height about 5 - 10 µm. Circular pore at end. Lower test subtrapezoidal, with two antapical horns of approximately equal size, about 2 - 3.5 µm long. No tabulation or archaeopyle observed. Cingulum annular, about 2.5 µm wide. Several "nuclei" near ventral section.
Size: Cysts 41.6 - 43.7 µm long and 34.5 - 38.5 µm wide.
Discussion: Since this species has proximate cysts and no observable archaeopyle, it does not properly belong to Deflandrea, so a new combination is made here.
Now Saeptodinium. Originally Deflandrea, subsequently Sanshuia, thirdly Geiselodinium, fourthly (and now) Saeptodinium. This combination was not validly
published in Yu Jingxian et al., 1981, who did not fully reference the basionym. Holotype: Jiabo, 1978, pl.3, fig.11
Age: Early Tertiary
Description: Outline subcircular or tripodal. Periphragm fairly thin. Endocyst subcircular or indistinct when present. Surface smooth, granulate or sparsely spinose. Upper test in shape of reversed funnel. Apical horn extends out conspicuously and has conical shape; height about 5 - 10 µm. Circular pore at end. Lower test subtrapezoidal, with two antapical horns of approximately equal size, about 2 - 3.5 µm long. No tabulation or archaeopyle observed. Cingulum annular, about 2.5 µm wide. Several "nuclei" near ventral section.
Size: Cysts 41.6 - 43.7 µm long and 34.5 - 38.5 µm wide.
Discussion: Since this species has proximate cysts and no observable archaeopyle, it does not properly belong to Deflandrea, so a new combination is made here.