Gonyaulacysta mosaicum

"mosaicum" Downie, 1957, p.424, pl.20, fig.7; text-fig.2f ex Sarjeant, 1967b, p.253.  Emendation: Sarjeant, 1976c, p.6-7, as Leptodinium mosaicum.  Holotype: Downie, 1957, pl.20, fig.7; text-fig.2f; Sarjeant, 1976c, pl.2, figs.3,5; text-figs.2a-b; Jan du Chêne et al., 1986a, pl.70, figs.5-6.  NOW Leptodinium?.  Originally Palaeoperidinium (name not validly published), subsequently Gonyaulacysta, thirdly Leptodinium, fourthly (and now) Leptodinium?.  The name Palaeoperidinium mosaicum was not validly published in Downie (1957) since the generic name Palaeoperidinium was not validly published until 1967.  Williams et al. (1998, p.253) accepted Sarjeant's (1967b) indirect reference to Downie (1957) as indication of a type (I.C.N. Article 40.3).  N.I.A.  Age: Late Kimmeridgian.

Parent: Gonyaulacysta