From Williams, Lentin and Fensome 1998 - Lentin and Williams Index of Fossil Dinoflagellates:

[Adnatosphaeridium apiculatum, (Cookson and Eisenack, 1960b, p. 254, pl.39, fig.15), Lentin and Williams, 1973, p. 11; Emendation as Papuadinium apiculatum: Davey, 1988, p.42-43

NOW Papuadinium. Originally Cannosphaeropsis, subsequently Adnatosphaeridium, thirdly Rigaudella, fourthly (and now) Papuadinium.

Holotype: Cookson and Eisenack, 1960b, pl.39, fig.15; Fensome et al., 1993a, fig.1 - p.927. ]
Locus typicus: Canning Basin, W Australia
Age: Tithonian

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Original description as Cannosphaeropsis apiculata: [Cookson and Eisenack, 1960, p. 254]:

Description:
Shell small, sphaerical with simple network composed of about eight to twelve solid sometimes flattened supporting processes which branch distally and thin connecting threads which bear small spinules.

Dimensions:
Holotype: shell 40 µm, overall 86 µm; other specimens shell 30-40 µm, overall 55-76 µm.