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Heslertonia cylindrata
From Fensome et al., 2019:
Heslertonia cylindrata Yun Hyesu, 1981, p.72, pl.8, figs.3a–b,11; text-figs.15a–b. Holotype: Yun Hyesu, 1981, pl.8, figs.3a–b; text-figs.15a–b; Fensome et al., 1991, figs.1–4 — p.637. Age: early Santonian.
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Paratype: Yun, 1981, pl.8, fig.11
Locus typicus: Timmermann brickyard near Esbeck, Germany
Stratum typicum: Early Santonian
Translation Yun Hyesu, 1981: Fensome, 1991, p. 638
Original diagnosis: Yun Hyesu, 1981, p. 72
The layers of the spherical to polygonal central body are not recognizable, the central body is divided into paraplates by delicate, smooth wing-like septa, which are 32 µm high. The wing-like septa have convex edges and are lowest at their junctions. They increase in height posteriorly and are highest at the antapex. The paracingulum is slightly helicoid and has six compressed, cylindrical processes, which are interconnected by a single-layered membrane. This membrane is interrupted only at the parasulcus. The paratabulation is as follows: 3', 5", 6c, 5''', 1''''.
Heslertonia cylindrata Yun Hyesu, 1981, p.72, pl.8, figs.3a–b,11; text-figs.15a–b. Holotype: Yun Hyesu, 1981, pl.8, figs.3a–b; text-figs.15a–b; Fensome et al., 1991, figs.1–4 — p.637. Age: early Santonian.
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Paratype: Yun, 1981, pl.8, fig.11
Locus typicus: Timmermann brickyard near Esbeck, Germany
Stratum typicum: Early Santonian
Translation Yun Hyesu, 1981: Fensome, 1991, p. 638
Original diagnosis: Yun Hyesu, 1981, p. 72
The layers of the spherical to polygonal central body are not recognizable, the central body is divided into paraplates by delicate, smooth wing-like septa, which are 32 µm high. The wing-like septa have convex edges and are lowest at their junctions. They increase in height posteriorly and are highest at the antapex. The paracingulum is slightly helicoid and has six compressed, cylindrical processes, which are interconnected by a single-layered membrane. This membrane is interrupted only at the parasulcus. The paratabulation is as follows: 3', 5", 6c, 5''', 1''''.