Back
Millioudodinium exsanguium
Millioudinium? exangium (Duxbury, 1977) Sarjeant, 1982; Emendation: Harding, 1990b, p.31–32, as Gonyaulacysta exsanguia.
NOW Stanfordella. Originally Gonyaulacysta, subsequently Millioudodinium?, thirdly (and now) Stanfordella.
Lentin and Williams, 1985, recommended retaining this species in Gonyaulacysta Deflandre, 1964.
Sarjeant, 1982, questionably included this species in Millioudodinium.
Holotype: Duxbury, 1977, pl.1, fig.6, text-fig.10b; Jan du Chêne et al., 1986, pl.40, figs.1-3
Paratype: Duxbury, 1977, pl.1, fig.7
Locus typicus: Speeton, England
Stratum typicum: Hauterivian-Barremian
Original diagnosis: Duxbury, 1977, p.35-36: Gonyaulacysta exsanguia
A small species of Gonyaulacysta which is distinctly thin-walled with a finely granular body surface. A short, blunt apical horn is present. Tabulation ?4", 6", 6""", 1p, 1"""", outlined by low, denticulate sutural crests. Individual denticles fairly broad to slender, flared proximally and distally.
Observed Dimensions: Holotype 57 x 62 Ám. Overall 62(54)46 x 62(52)43 Ám.
Affinities:
Duxbury, 1977, p. 36: Gonyaulacysta exsanguia
The very thin-walled, highly transparent nature of this form, combined with the sutural crest denticulation sets it apart from all others. In the overall test form and thinness of the test walls, Gonyaulacysta exsanguia resembles Gonyaulacysta ordocava n. sp. The two species are easily distinguishable, however, due to the very distinctive, regularly perforate sutural crests of Gonyaulacysta ordocava.
NOW Stanfordella. Originally Gonyaulacysta, subsequently Millioudodinium?, thirdly (and now) Stanfordella.
Lentin and Williams, 1985, recommended retaining this species in Gonyaulacysta Deflandre, 1964.
Sarjeant, 1982, questionably included this species in Millioudodinium.
Holotype: Duxbury, 1977, pl.1, fig.6, text-fig.10b; Jan du Chêne et al., 1986, pl.40, figs.1-3
Paratype: Duxbury, 1977, pl.1, fig.7
Locus typicus: Speeton, England
Stratum typicum: Hauterivian-Barremian
Original diagnosis: Duxbury, 1977, p.35-36: Gonyaulacysta exsanguia
A small species of Gonyaulacysta which is distinctly thin-walled with a finely granular body surface. A short, blunt apical horn is present. Tabulation ?4", 6", 6""", 1p, 1"""", outlined by low, denticulate sutural crests. Individual denticles fairly broad to slender, flared proximally and distally.
Observed Dimensions: Holotype 57 x 62 Ám. Overall 62(54)46 x 62(52)43 Ám.
Affinities:
Duxbury, 1977, p. 36: Gonyaulacysta exsanguia
The very thin-walled, highly transparent nature of this form, combined with the sutural crest denticulation sets it apart from all others. In the overall test form and thinness of the test walls, Gonyaulacysta exsanguia resembles Gonyaulacysta ordocava n. sp. The two species are easily distinguishable, however, due to the very distinctive, regularly perforate sutural crests of Gonyaulacysta ordocava.