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Gonyaulacysta confossa
Gonyaulacysta confossa Duxbury, 1977
Now Cribroperidinium?. Originally Gonyaulacysta, subsequently Millioudodinium, thirdly Cribroperidinium?, fourthly (and now) Cribroperidinium.
Holotype: Duxbury, 1977,pl.2, figs.3,4; Jan du Chene et al., 1986, pl.19, fig.5
Paratype: Duxbury, 1977,pl.2, fig.2
Locus typicus: Speeton Clay, Speeton, England.
Stratum typicum: Hauterivian
Original descripition: Duxbury, 1977, p. 33
A species of Gonyaulacysta with coarsely perforate test and a long apical horn (this typically measures half the main body length) The tabulation 4", 6", 6""", 1p, 1pv, 1"""" is outlined by low periphragm crests which are delicate, proximally perforate and distally denticulate. Cingulum distinctly laevo-rotatory, archeopyle large and formed by detachment of plate 3".
Observed Dimensions: Holotype 159x95 µm. Overall 173(135)108x113(92)76 µm.
Affinities:
Duxbury, 1977, p. 33: The coarsely perforate endophragm, long apical horn and delicate sutural crests distinguish this species from all others.
Now Cribroperidinium?. Originally Gonyaulacysta, subsequently Millioudodinium, thirdly Cribroperidinium?, fourthly (and now) Cribroperidinium.
Holotype: Duxbury, 1977,pl.2, figs.3,4; Jan du Chene et al., 1986, pl.19, fig.5
Paratype: Duxbury, 1977,pl.2, fig.2
Locus typicus: Speeton Clay, Speeton, England.
Stratum typicum: Hauterivian
Original descripition: Duxbury, 1977, p. 33
A species of Gonyaulacysta with coarsely perforate test and a long apical horn (this typically measures half the main body length) The tabulation 4", 6", 6""", 1p, 1pv, 1"""" is outlined by low periphragm crests which are delicate, proximally perforate and distally denticulate. Cingulum distinctly laevo-rotatory, archeopyle large and formed by detachment of plate 3".
Observed Dimensions: Holotype 159x95 µm. Overall 173(135)108x113(92)76 µm.
Affinities:
Duxbury, 1977, p. 33: The coarsely perforate endophragm, long apical horn and delicate sutural crests distinguish this species from all others.