Isabelia gambangensis (Cookson and Eisenack, 1970) Lentin and Williams, 1976

Combination illegitimate since the generic nameIsabelia is illegitimate.
Now Eucladinium. Originally Deflandrea, subsequently Isabelia (combination illegitimate), thirdly Isabelidinium, fourthly (and now) Eucladinium.

Holotype: Cookson and Eisenack, 1970, pl.11, fig.1
Paratype: Cookson and Eisenack, 1970
Locus typicus: Gambanga No. 1 Bore, Eucla Basin, Western Australia
Stratum typicum: Senonian

Original description: Cookson and Eisenack, 1970, p.140: Deflandrea gambangensis
Shell slightly longer than broad, partially filled by a relatively large internal capsule, with a smooth wall, which extends from a variable distance from the base of the hypotheca well into the epitheca.
The epitheca has a slightly wavy outline and a short apical horn, which, when entire, is bluntly-pointed (fig. 2). When, as sometimes happens, the extreme tip is missing a slight concavity is evident. The sides of the hypotheca, which are straight or slightly convex, slant downwards towards the point of origin of the single, short, but prominent antapical horn present on the left-hand sidc. A girdle seems to be absent, but slight concavities sometimes evident on the two sides where the shell is broadest, may indicate its existence. The archeopyle is intercalary, relatively large, rounded hoof-shaped with a straight base.
The surface of the epitheca is finely dotted with minute thickenings, which are arranged in longitudinal rows which slant from the girdle region towards the apex. Typically a small, somewhat triangular area between the top of the archeopyle and the apex is unornamented. Occasionally a slight, fine ornamentation of the hypotheca has been observed.
Dimensions: Holotype: c. 86 Ám long, 68 Ám broad. Range of 10 examples: c. 86-105 Ám long, 68-81 Ám broad.