From Fensome et al., 2019:
Fromea cylindrica (Cookson and Eisenack, 1960b, p.258, pl.39, fig.16) Stover and Evitt, 1978, p.48. Holotype: Cookson and Eisenack, 1960b, pl.39, fig.16. Originally Palaeostomocystis (Appendix A), subsequently Fromea?, thirdly (and now) Fromea. Questionable assignment: Stover and Evitt (1978, p.48) — however, Jansonius (1989, p.65) included this species in Fromea without question. Age: Late Jurassic–Neocomian.

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Original description (Cookson and Eisenack, 1960b):

Palaeostomocystis cylindrica sp. nov.
Plate 38, fig. 16: holotype Nat. Mus. Vic. PI7786

Occurrence. Oxfordian to Lower Kimeridgian: Alexander Formation, W.A., Wallal Core hole between 560 and 575 ft. Probably Tithonian: Jarlemai Siltstone (upper portion), W.A., Broome No. 3 Bore between 1,200 and 1.211 ft., and 1,001 and 1,042 ft., Broome No. 1 Bore at 963 and 977 ft.: Wallal Core hole at 350 ft., and between 305 and 320 ft.; Roebuck Bay, W.A., Wapet's No. 1 Well between 972 and 982 ft. Neocomian: Komewu, Papua, I.E.C.'s Well No. 2, core 10.

Description. Shell cylindrical with rounded ends and a terminal, slightly surnken opening. Wall about 4 μ thick, finely granular, ornamented with a low, small-meshed, thick-walled reticulum.
Dimensions: holotype- 71 μ long, 48 μ broad, opening c. 14 μ.
Range -76-86 μ x 38-56 μ, opening 10-20 μ.