Lithodinia "mombasaensis" (Mungai in Jiang Qinghua et al., 1992, p.87, pl.2, figs.1-2; text-figs.3a-c) Lentin and Williams, 1993, p.400. Holotype: Jiang Qinghua et al., 1992, pl.2, fig.1.

NOW Meiourogonyaulax. Originally (and now) Meiourogonyaulax, subsequently Lithodinia.
Age: Kimmeridgian-Tithonian.

Original diagnosis: Mungai in Jiang et al. 1992, p. 87: Meiourogonyaulax mombasaensis
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: Meiourogonyaulax mombasaensis
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.