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Millioudodinium pannonicum
Millioudodinium pannonicum (Nagy, 1965) Stover and Evitt, 1978
Now Cribroperidinium?. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly Millioudodinium?, fourthly (and now) Cribroperidinium?.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Millioudodinium.
Holotype: Nagy, 1965, pl.1, figs.1-2, pl.2, fig.10; Jan du Chêne et al., 1986, pl.31, figs.1-4
Age: Early Pliocene
Original description, Nagy 1965: Gonyaulax pannonicus n. sp. (Table I, Figs 1 and 2. Table II, Fig. 10)
Holotype: in the Pollen Laboratory of the Hungarian Geological Institute; Hidas, bore-hole No. 53; sample No. 4; Plate 1; cross-table numbers: 28.9 to 106.2.
Locus typicus: Hidas, Mecsek Mountains.
Stratum typicum: Pannonian light grey silty clayey marl; Hidas, bore-hole No. 53; 132.5 to 134.8 m.
Description and diagnosis: 65 x 61 µm large sphaeroid form. Epitheca and hypotheca of nearly equal dimensions. Epitheca tabulation: 3, 2a, 6’’, girdle helicoidal 6 g, hypotheca rounded-off, 6’’’, 1p, 1’’’’. The outline of tabulations edged, granulated. Surface corroded (Figs 1 and 2).
Besides the holotype and one more specimen, but of higher damaged state came to light.
Remark: Reminds mostly of the figure of the recent Gonyaulax polyedra (Grassé, I. p. 351, Fig. 259).
Differential diagnosis: Somewhat smaller than Gonyaulax margaritifera Cooks. – Eis. 1960 (micropaleont. 1960, Vol. 6 No. 1 p 5-6) and 6’’ attached to the longitudinal furrow lager. Fairly similar to the hypothetic illustration showing the shell tabulation in the Figs 7 to 10, which follow the description of Gonyaulax pachyderma Defl. 1938, p. 25-26, but is decisively separated from the Figs 6 to 10 of the illustration VII by its lamella-like dividing walls, spines and the form of the transversal furrow.
Now Cribroperidinium?. Originally Gonyaulax, subsequently Gonyaulacysta, thirdly Millioudodinium?, fourthly (and now) Cribroperidinium?.
Stover and Evitt, 1978, considered this to be a provisionally accepted species of Millioudodinium.
Holotype: Nagy, 1965, pl.1, figs.1-2, pl.2, fig.10; Jan du Chêne et al., 1986, pl.31, figs.1-4
Age: Early Pliocene
Original description, Nagy 1965: Gonyaulax pannonicus n. sp. (Table I, Figs 1 and 2. Table II, Fig. 10)
Holotype: in the Pollen Laboratory of the Hungarian Geological Institute; Hidas, bore-hole No. 53; sample No. 4; Plate 1; cross-table numbers: 28.9 to 106.2.
Locus typicus: Hidas, Mecsek Mountains.
Stratum typicum: Pannonian light grey silty clayey marl; Hidas, bore-hole No. 53; 132.5 to 134.8 m.
Description and diagnosis: 65 x 61 µm large sphaeroid form. Epitheca and hypotheca of nearly equal dimensions. Epitheca tabulation: 3, 2a, 6’’, girdle helicoidal 6 g, hypotheca rounded-off, 6’’’, 1p, 1’’’’. The outline of tabulations edged, granulated. Surface corroded (Figs 1 and 2).
Besides the holotype and one more specimen, but of higher damaged state came to light.
Remark: Reminds mostly of the figure of the recent Gonyaulax polyedra (Grassé, I. p. 351, Fig. 259).
Differential diagnosis: Somewhat smaller than Gonyaulax margaritifera Cooks. – Eis. 1960 (micropaleont. 1960, Vol. 6 No. 1 p 5-6) and 6’’ attached to the longitudinal furrow lager. Fairly similar to the hypothetic illustration showing the shell tabulation in the Figs 7 to 10, which follow the description of Gonyaulax pachyderma Defl. 1938, p. 25-26, but is decisively separated from the Figs 6 to 10 of the illustration VII by its lamella-like dividing walls, spines and the form of the transversal furrow.