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Impagidinium gracilium
Impagidinium gracilium Shaw Chenglong, 1999b, p.170, figs.37-42.
Holotype: Shaw Chenglong, 1999b, figs.37-39.
Age: Eocene.
Original description (Shaw Chenglong, 1999b)
Description: Cyst small size, subspherical; 33-45 µm long, 32-38 µm wide; autophragm thin, smooth, bearing low, smooth-crested parasutural septa. Precingular archeopyle, distinct. Second and third apical paraplates large, and comprise significant area of upper dorsal epicyst; first and fourth apical paraplates relatively narrow and elongate. Paratabulation well dined; no apparent subdivision into sulcul paraplates.
Stratigraphic occurence: Eocene (OK-1 well, 1788 m; OK-3well, 1750m).
Derivation of name: Latin, gracilium, small; with reference to the smaller size.
Dimensions holotype: Overall 45 µm long, 38µm wide, height of septa 2-3 µm.
Dimensions overall: 33-45 µm long, 32-38 µm wide, height of septa 1.5-3 µm (n=3)
Remarks: The new species most colsely resembles Impagidinium crassimuratum Wilson, but differs from that species in having smller size and in having thin autophragm.
Holotype: Shaw Chenglong, 1999b, figs.37-39.
Age: Eocene.
Original description (Shaw Chenglong, 1999b)
Description: Cyst small size, subspherical; 33-45 µm long, 32-38 µm wide; autophragm thin, smooth, bearing low, smooth-crested parasutural septa. Precingular archeopyle, distinct. Second and third apical paraplates large, and comprise significant area of upper dorsal epicyst; first and fourth apical paraplates relatively narrow and elongate. Paratabulation well dined; no apparent subdivision into sulcul paraplates.
Stratigraphic occurence: Eocene (OK-1 well, 1788 m; OK-3well, 1750m).
Derivation of name: Latin, gracilium, small; with reference to the smaller size.
Dimensions holotype: Overall 45 µm long, 38µm wide, height of septa 2-3 µm.
Dimensions overall: 33-45 µm long, 32-38 µm wide, height of septa 1.5-3 µm (n=3)
Remarks: The new species most colsely resembles Impagidinium crassimuratum Wilson, but differs from that species in having smller size and in having thin autophragm.