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Isabelia korojonensis
Isabelia korojonensis (Cookson and Eisenack, 1958) Lentin and Williams, 1976
Combination illegitimate since the generic name Isabelia is illegitimate.
Now Isabelidinium. Originally Deflandrea, subsequently Isabelia (combination illegitimate), thirdly (and now) Isabelidinium.
Holotype: Cookson and Eisenack, 1958, pl.4, fig.10
Locus typicus: Korojon Calcarenite, Carnarvon Basin, Australia
Stratum typicum: Campanian-Early Maastrichtian
Original description: Cookson and Eisenack, 1958, p.28: Deflandrea korojonensis
Theca rather variable in outline, typically somewhat quadrangular, with convex sides which become concave beneath the broadly rounded or bracket-shaped apex and narrow gradually towards a more or less truncate antapex, sometimes one side is prolonged as an abbreviated horn; a transverse furrow is not indicated. The capsule fills the theca laterally and is usually broader than long; a slightly polygonal pylome is present near its anterior end. The membrane of the theca is smooth, that of the capsule faintly granular.
Dimensions: Type - theca 71 x 52 Ám; capsule 38 x 50 Ám. Range - theca 61-80 x 38-53 Ám; capsule 32-42 x 36-50 Ám.
Combination illegitimate since the generic name Isabelia is illegitimate.
Now Isabelidinium. Originally Deflandrea, subsequently Isabelia (combination illegitimate), thirdly (and now) Isabelidinium.
Holotype: Cookson and Eisenack, 1958, pl.4, fig.10
Locus typicus: Korojon Calcarenite, Carnarvon Basin, Australia
Stratum typicum: Campanian-Early Maastrichtian
Original description: Cookson and Eisenack, 1958, p.28: Deflandrea korojonensis
Theca rather variable in outline, typically somewhat quadrangular, with convex sides which become concave beneath the broadly rounded or bracket-shaped apex and narrow gradually towards a more or less truncate antapex, sometimes one side is prolonged as an abbreviated horn; a transverse furrow is not indicated. The capsule fills the theca laterally and is usually broader than long; a slightly polygonal pylome is present near its anterior end. The membrane of the theca is smooth, that of the capsule faintly granular.
Dimensions: Type - theca 71 x 52 Ám; capsule 38 x 50 Ám. Range - theca 61-80 x 38-53 Ám; capsule 32-42 x 36-50 Ám.