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Fromea chytra
From Fensome et al., 2019:
Fromea chytra (Drugg, 1967, p.35, pl.6, fig.12) Stover and Evitt, 1978, p.48. Holotype: Drugg, 1967, pl.6, fig.12. Originally Palaeostomocystis (Appendix A), subsequently (and now) Fromea. Taxonomic junior synonym: Palaeostomocystis minor (Appendix A), according to Xu Jinli et al. (1997, p.41). Age: Maastrichtian–Danian.
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Original diagnosis: Drugg, 1967, p.35: Palaeostomocystis chytra
Test small, jug-shaped, with a broad apical aperture bordered by a narrow rim. The wall is from 0.5 to 1.0 µm thick, finely dotted, the dots apparently representing tiny grana. The dimensions vary from 23 to 28 µm in length and 20 to 25 µm in width. The aperture varies from 8 to 13 µm in diameter. Although only four specimens were recovered, they are so uniform and distinct that a new species seems warranted. Holotype dimensions, 24x20 µm.
Affinities:
Drugg, 1967, p.35: Palaeostomocystis chytra
This species bears a close resemblance to Fromea amphora Cookson and Eisenack (1958) and reported again in Manum and Cookson (1964). It differs from this genus and species primarily in that it lacks any indication of a girdle. It is also considerably smaller in size.
Fromea chytra (Drugg, 1967, p.35, pl.6, fig.12) Stover and Evitt, 1978, p.48. Holotype: Drugg, 1967, pl.6, fig.12. Originally Palaeostomocystis (Appendix A), subsequently (and now) Fromea. Taxonomic junior synonym: Palaeostomocystis minor (Appendix A), according to Xu Jinli et al. (1997, p.41). Age: Maastrichtian–Danian.
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Original diagnosis: Drugg, 1967, p.35: Palaeostomocystis chytra
Test small, jug-shaped, with a broad apical aperture bordered by a narrow rim. The wall is from 0.5 to 1.0 µm thick, finely dotted, the dots apparently representing tiny grana. The dimensions vary from 23 to 28 µm in length and 20 to 25 µm in width. The aperture varies from 8 to 13 µm in diameter. Although only four specimens were recovered, they are so uniform and distinct that a new species seems warranted. Holotype dimensions, 24x20 µm.
Affinities:
Drugg, 1967, p.35: Palaeostomocystis chytra
This species bears a close resemblance to Fromea amphora Cookson and Eisenack (1958) and reported again in Manum and Cookson (1964). It differs from this genus and species primarily in that it lacks any indication of a girdle. It is also considerably smaller in size.