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Palaeostomocystis chytra
Palaeostomocystis chytra Drugg, 1967
Now Fromea. Originally Palaeostomocystis, subsequently (and now) Fromea.
Holotype: Drugg, 1967, pl.6, fig.12
Locus typicus: Ecarpado Canyon, California
Stratum typicum: Maastrichtian-Danian
Original diagnosis: Drugg, 1967, p.35
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, 24 x 20µm.
Affinities:
Drugg, 1967, p.35: 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.
Now Fromea. Originally Palaeostomocystis, subsequently (and now) Fromea.
Holotype: Drugg, 1967, pl.6, fig.12
Locus typicus: Ecarpado Canyon, California
Stratum typicum: Maastrichtian-Danian
Original diagnosis: Drugg, 1967, p.35
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, 24 x 20µm.
Affinities:
Drugg, 1967, p.35: 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.