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Stanfordella ordocava
Stanfordella ordocava (Duxbury, 1977, p.37–38, pl.1, figs.10–11; text-fig.12) Helenes and Lucas-Clark, 1997, p.184.
Holotype: Duxbury, 1977, pl.1, figs.10–11; text-fig.12; Jan du Chêne et al., 1986a, pl.41, figs.1–2.
Originally Gonyaulacysta, subsequently Millioudodinium, thirdly (and now) Stanfordella.
Age: early–late Hauterivian.
Original diagnosis: Duxbury, 1977, p.37-38
Endophragm thin, smooth to finely granular and produced into a distinct, rounded apical prominence. Periphragm thin, finely granular, produced into a short apical horn. Tabulation 4", 6", ?6""", 1"""", outlined by very distinctive sutural crests. These are low, distally entire and of constant hight. A regulary-spaced row of perforations each about one micron in diameter occurs in each crest.
Remark:
Duxbury, 1977, p. 38: This is a very distinctive though uncommon species and the regularly perforate sutural crests set it apart from all others. The thinness of the body walls and the overall test suggests some affinity with G. exsanguia.
Holotype: Duxbury, 1977, pl.1, figs.10–11; text-fig.12; Jan du Chêne et al., 1986a, pl.41, figs.1–2.
Originally Gonyaulacysta, subsequently Millioudodinium, thirdly (and now) Stanfordella.
Age: early–late Hauterivian.
Original diagnosis: Duxbury, 1977, p.37-38
Endophragm thin, smooth to finely granular and produced into a distinct, rounded apical prominence. Periphragm thin, finely granular, produced into a short apical horn. Tabulation 4", 6", ?6""", 1"""", outlined by very distinctive sutural crests. These are low, distally entire and of constant hight. A regulary-spaced row of perforations each about one micron in diameter occurs in each crest.
Remark:
Duxbury, 1977, p. 38: This is a very distinctive though uncommon species and the regularly perforate sutural crests set it apart from all others. The thinness of the body walls and the overall test suggests some affinity with G. exsanguia.