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Ochetodinium vermiculatum
Ochteodinium vermiculatum (Wilson, 1988, p.26–27, pl.16, figs.1–2) Clowes and Wilson, 2006, p.406.
Holotype: Wilson, 1988, pl.16, fig.2; Fensome et al., 1996, fig.2 — p.2429.
Originally Ochetodinium, subsequently (and now) Corrudinium.
Age: early Eocene.
Original description: Wilson, 1988, p. 27
Cyst fairly small, spherical to subspherical, with somewhat irregular vermiculate intratabular ornament and a finely reticulate surface. Paratabulation indistinct but apparently conforms to that of the genus. Hypocyst typically larger than epicyst. Autophragm thick (up to 5 µm) with a somewhat knobbly outline. Archeopyle trapezoidal to subtriangular, with a thickened margin; operculum free. Paracingulum fairly broad (up to 5 µm) poorly defined, especially on the ventral surface.
Dimensions: Holotype: length 56 µm, breadth 54 µm. Range: maximum diameter 46 (53) 61 µm (10 specimens).
Affinities:
Wilson, 1988, p. 27: The species differs from the type species 0. romanum in having a typically vermiculate intratabular ornamentation, an apparently thicker wall, and in having less well-defined paratabulation. It also resembles some species of Corrudinium but differs in having relatively prominent intratabular ornamentation.
Holotype: Wilson, 1988, pl.16, fig.2; Fensome et al., 1996, fig.2 — p.2429.
Originally Ochetodinium, subsequently (and now) Corrudinium.
Age: early Eocene.
Original description: Wilson, 1988, p. 27
Cyst fairly small, spherical to subspherical, with somewhat irregular vermiculate intratabular ornament and a finely reticulate surface. Paratabulation indistinct but apparently conforms to that of the genus. Hypocyst typically larger than epicyst. Autophragm thick (up to 5 µm) with a somewhat knobbly outline. Archeopyle trapezoidal to subtriangular, with a thickened margin; operculum free. Paracingulum fairly broad (up to 5 µm) poorly defined, especially on the ventral surface.
Dimensions: Holotype: length 56 µm, breadth 54 µm. Range: maximum diameter 46 (53) 61 µm (10 specimens).
Affinities:
Wilson, 1988, p. 27: The species differs from the type species 0. romanum in having a typically vermiculate intratabular ornamentation, an apparently thicker wall, and in having less well-defined paratabulation. It also resembles some species of Corrudinium but differs in having relatively prominent intratabular ornamentation.