Lithodinia "pertusa" Duxbury, 1977, p.41-43, pl.8, fig.5; text-fig.15. Holotype: Duxbury, 1977, pl.8, fig.5; text-fig.15; Fensome et al., 1991, figs.1-3 - p.709; figs.1-3 - p.711. NOW Meiourogonyaulax. Originally Lithodinia, subsequently (and now) Meiourogonyaulax. Age: Late Berriasian-Early Hauterivian.

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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.

Lithodinia pertusa Duxbury, 1977. According to the diagnosis, this is a fairly thick-walled proximate cyst. The wall is perforate with very low sutural crests outlining the tabulation of 4', 6", 7c, 7"’, 1p, 1pv, 1"”. Archeopyle apical. The closest resemblance is with Gonyaulax bulloidea which differs in having granular plates and crests. The plates and crests of L.pertusa are distinctly perforate. Size: (archeopyle formed), 65-76 by 68-86 µm.
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Original diagnosis: Duxbury, 1977, p. 41-42
A fairly thick-walled proximate cyst. Test wall with very low sutural crests outlining the tabulation 4', 6'', 7c, 7''', 1p, 1pv, 1''''. Archaeopyle apical.
Dimensions: Holotype 76x81 µm; archaeopyle formed: 76(68)65x86(75)68 µm.