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Ynezidinium latolineatum
Ynezidinium latolineatum, Yun Hyesu, 1981, p.10–11; Lucas-Clark and Helenes, 2000, p.118
Originally Leptodinium, subsequently (and now) Ynezidinium.
Holotype: Yun Hyesu, 1981, pl.9, figs.10a–b; text-figs.2a–b; Jan du Chêne et al., 1986a, pl.75, figs.12–14; Fensome et al., 1991, figs.1–4 — p.659.
Age: early Santonian.
Original description: Yun, 1981 (as Leptodinium):
Original diagnosis: Yun, 1981, p. 11
A spherical proximate cyst with a tabulation indicated by pandasutural zones. Tabulation: 3", 6"", 5""", lp, 1"""", whereas the paracingulum is not subdivided.
Description:
The slightly depressed pandasutural zones are marked by ridges or by thin, relatively low, distally serrate membranes. In the paratabulation paraplate 1" is always elongate quadrangular, whereas paraplates 2" and 3" are more or less quadrangular. Between paraplates 1" and 5" is an especially wide border zone which resembles paraplate 1". In the precingular plates, paraplate 6" is pentagonal and conspicuously small. Paraplate 3", which forms the triangular to quadrangular archeopyle, is bordered anteriorly by the two apical plates 2" and 3". The paracingulum is weakly helicoid and slightly wider than the pandasutural zones. Among the postcingular paraplates, 2""", 3""", and 4""" are trapezoidal and very large, whereas paraplate 1""" is quadrangular and considerably smaller. The parasulcus is elongate triangular and separated from the paracingulum and other paraplates by ridges. Paraplate 1"""" is quadrangular.
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Originally Leptodinium, subsequently (and now) Ynezidinium.
Holotype: Yun Hyesu, 1981, pl.9, figs.10a–b; text-figs.2a–b; Jan du Chêne et al., 1986a, pl.75, figs.12–14; Fensome et al., 1991, figs.1–4 — p.659.
Age: early Santonian.
Original description: Yun, 1981 (as Leptodinium):
Original diagnosis: Yun, 1981, p. 11
A spherical proximate cyst with a tabulation indicated by pandasutural zones. Tabulation: 3", 6"", 5""", lp, 1"""", whereas the paracingulum is not subdivided.
Description:
The slightly depressed pandasutural zones are marked by ridges or by thin, relatively low, distally serrate membranes. In the paratabulation paraplate 1" is always elongate quadrangular, whereas paraplates 2" and 3" are more or less quadrangular. Between paraplates 1" and 5" is an especially wide border zone which resembles paraplate 1". In the precingular plates, paraplate 6" is pentagonal and conspicuously small. Paraplate 3", which forms the triangular to quadrangular archeopyle, is bordered anteriorly by the two apical plates 2" and 3". The paracingulum is weakly helicoid and slightly wider than the pandasutural zones. Among the postcingular paraplates, 2""", 3""", and 4""" are trapezoidal and very large, whereas paraplate 1""" is quadrangular and considerably smaller. The parasulcus is elongate triangular and separated from the paracingulum and other paraplates by ridges. Paraplate 1"""" is quadrangular.
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