From Fensome et al., 2019:
Anthosphaeridium convolvuloides, Cookson and Eisenack, 1968, p.115, figs.4A–D.
Holotype: Cookson and Eisenack, 1968, fig.4A.
Age: Santonian–early Campanian.

Locus typicus: Perth Basin, Gingin Brook silty limestone at 202-204 ft.

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Original description: [Cookson and Eisenack, 1968, p. 115]:

Diagnosis:
Shell small, circular in outline with a thin, finely granular wall. Appendages very numerous, apparently hollow throughout their length, consisting of a short, gradually widening tubular stalk and a widely open funnel-shaped terminal portion, the wall of which is longitudinally striated. The appendages resemble the flowers of Convolvulus sp. in shape, hence the choice of the specific name.

Dimensions:
Holotype - shell c. 44 µm; overall diameter c. 70 µm. Range - shell c. 40-50 µm, overall diameter c. 56-80 µm.