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Meiourogonyaulax mombasaensis
From Fensome et al., 2019:
Meiourogonyaulax mombasaensis Mungai in Jiang Qinghua et al., 1992, p.87, pl.2, figs.1–2; text-figs.3a–c. Holotype: Jiang Qinghua et al., 1992, pl.2, fig.1. Originally (and now) Meiourogonyaulax, subsequently Lithodinia. This species is retained in Meiourogonyaulax following the retention of the genus by Riding and Helby (2001d, p.81,83). Age: Kimmeridgian–Tithonian.
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Locus typicus: Mto Panga Quarry, Kenya
Stratum typicum: Kimmeridgian-Tithonian
Original diagnosis: Mungai in Jiang et al. 1992, p. 87
A species of Meiourogonyaulax characterised by its smooth surface, spherical shape and by the tabulation being clearly marked by distinct low lines of thickening along the parasutures.
Original description: Mungai in Jiang et al. 1992, p. 87
The cyst consists of thin but firm autophragm <1µm in thickness. Its surface is almost completely smooth. Paratabulation is indicated by low, smooth, narrow parasutural ridges. Tabulation I pr, 4', 6", 6c, 7, 6''', 1p, 1''''; L-type ventral organisation, gonyaulacoid. Cingulum laevorotatory with ventral offset of one cingulum width. Archaeopyle apical, type tA. The apical margin is markedly zig-zag and the operculum free.
Dimensions: Length: 32-45 µm, breadth: 34-51 µm.
Meiourogonyaulax mombasaensis Mungai in Jiang Qinghua et al., 1992, p.87, pl.2, figs.1–2; text-figs.3a–c. Holotype: Jiang Qinghua et al., 1992, pl.2, fig.1. Originally (and now) Meiourogonyaulax, subsequently Lithodinia. This species is retained in Meiourogonyaulax following the retention of the genus by Riding and Helby (2001d, p.81,83). Age: Kimmeridgian–Tithonian.
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Locus typicus: Mto Panga Quarry, Kenya
Stratum typicum: Kimmeridgian-Tithonian
Original diagnosis: Mungai in Jiang et al. 1992, p. 87
A species of Meiourogonyaulax characterised by its smooth surface, spherical shape and by the tabulation being clearly marked by distinct low lines of thickening along the parasutures.
Original description: Mungai in Jiang et al. 1992, p. 87
The cyst consists of thin but firm autophragm <1µm in thickness. Its surface is almost completely smooth. Paratabulation is indicated by low, smooth, narrow parasutural ridges. Tabulation I pr, 4', 6", 6c, 7, 6''', 1p, 1''''; L-type ventral organisation, gonyaulacoid. Cingulum laevorotatory with ventral offset of one cingulum width. Archaeopyle apical, type tA. The apical margin is markedly zig-zag and the operculum free.
Dimensions: Length: 32-45 µm, breadth: 34-51 µm.