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Samlandia septata
Samlandia septata Wilson, 1988
Holotype: Wilson, 1988, pl.19, fig.5a-b
Locus typicus: Waipawa Section, Hawkes Bay, New Zealand
Stratum typicum: Waipawan Stage, Early Eocene
Original description: Wilson, 1988, p. 29
Cyst of intermediate size, subspherical, without pronounced polar appendages. Autophragm fairly thick (2-3 µm), bears numerous solid processes (length up to 10 µm) concentrated mostly in parasutural areas and distally joined to form a crude alignment of parasutural septa; much of intratabular area smooth and devoid of ornament. Autophragm processes completely or partly covered by thin smooth ectophragm. Paratabulation unclear, apparently gonyaulacacean. Archeopyle precingular, fairly large, Type P (3""); operculum free. Paracingulum fairly well defined on dorsal surface by subparallel rows of septa (breadth 6-8 µm); not evident on ventral side. Parasulcus not indicated. Dimensions: Holotype: overall length 81 µm, breadth 78 µm, length of central autocyst 70 µm, breadth 59 µm. Range: overall length 81(84)92 µm, breadth 73(79)86 µm (n= 10).
Affinities:
Wilson, 1988, p. 29: Samlandia septata differs from other species of Samlandia in having most of the autophragm ornament located in a parasutural position and thus defining a partial paratabulation. The existence of a complete or partial ectophragm indicates that the species should be classified in Samlandia rather than Impagidinium.
Holotype: Wilson, 1988, pl.19, fig.5a-b
Locus typicus: Waipawa Section, Hawkes Bay, New Zealand
Stratum typicum: Waipawan Stage, Early Eocene
Original description: Wilson, 1988, p. 29
Cyst of intermediate size, subspherical, without pronounced polar appendages. Autophragm fairly thick (2-3 µm), bears numerous solid processes (length up to 10 µm) concentrated mostly in parasutural areas and distally joined to form a crude alignment of parasutural septa; much of intratabular area smooth and devoid of ornament. Autophragm processes completely or partly covered by thin smooth ectophragm. Paratabulation unclear, apparently gonyaulacacean. Archeopyle precingular, fairly large, Type P (3""); operculum free. Paracingulum fairly well defined on dorsal surface by subparallel rows of septa (breadth 6-8 µm); not evident on ventral side. Parasulcus not indicated. Dimensions: Holotype: overall length 81 µm, breadth 78 µm, length of central autocyst 70 µm, breadth 59 µm. Range: overall length 81(84)92 µm, breadth 73(79)86 µm (n= 10).
Affinities:
Wilson, 1988, p. 29: Samlandia septata differs from other species of Samlandia in having most of the autophragm ornament located in a parasutural position and thus defining a partial paratabulation. The existence of a complete or partial ectophragm indicates that the species should be classified in Samlandia rather than Impagidinium.