Leptodinium pilum

?pilum (Gocht, 1959, p.56-57, pl.6, fig.14; pl.8, fig.8 ex Sarjeant, 1967b, p.254) Sarjeant, 1969, p.13.  Holotype: Gocht, 1959, pl.6, fig.14; Jan du Chêne et al., 1986a, pl.73, figs.7-8.  Originally Palaeoperidinium (name not validly published), subsequently Gonyaulacysta?, thirdly (and now) Leptodinium?.  Questionable assignment: Sarjeant (1969, p.13).  The name Palaeoperidinium pilum was not validly published in Gocht (1959) since the generic name Palaeoperidinium was not validly published until 1967.  Williams et al. (1998, p.372) accepted Sarjeant's (1967b) indirect reference to Gocht (1959) as indication of a type (I.C.B.N. Article 37.1).  Jan du Chêne et al. (1986a, p.211) recommended that this name be restricted to the holotype.  N.I.A.  Age: Valanginian.

Parent: Leptodinium