Leptodinium mosaicum

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?mosaicum (Downie, 1957, p.424, pl.20, fig.7; text-fig.2f ex Sarjeant, 1967b, p.253) Sarjeant, 1969, p.13.  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.  Originally Palaeoperidinium (name not validly published), subsequently Gonyaulacysta, thirdly Leptodinium, fourthly (and now) Leptodinium?.  Questionable assignment: Stover and Evitt (1978, p.170).  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.371) accepted Sarjeant's (1967b) indirect reference to Downie (1957) as indication of a type (I.C.N. Article 40.3).  Jan du Chêne et al. (1986a, p.210) considered that this species may be assignable to Acanthaulax.  N.I.A.  Age: late Kimmeridgian.

Parent: Leptodinium