From Fensome et al., 2019:

"Dictyopyxidia", Eisenack, 1961, p.316.
Substitute name for Dictyopyxis Cookson and Eisenack, 1960b (March), p.255 (an illegitimate name).
Taxonomic senior synonym: Ellipsoidictyum, according to Sarjeant (1976a, p.23).
Type: Cookson and Eisenack, 1960b, pl.39, fig.12, as Dictyopyxis areolata.

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Original description Dictyopyxis: Cookson and Eisenack, 1960:

Description:
Shell elongate with rounded ends and a reticulate wall; a division into epitheca and hypotheca and the presence of a `girdle` may be suggested by the more regular shape and arrangement of the meshes at or near the equator.
The shell opens by the detachment of one of the ends.