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Palaeostomocystis laevigata
Palaeostomocystis laevigata Drugg, 1967
Sr. homonym of Palaeostomocystis laevigata Jiabo, 1978. Now Fromea. Originally Palaeostomocystis, subsequently Fromea?, thirdly (and now) Fromea.
Holotype: Drugg, 1967, pl.6, fig.14
Paratype: Drugg, 1967
Locus typicus: Escarpado Canyon, California
Stratum typicum: Maastrichtian-Danian
Original diagnosis: Drugg, 1967, p.35
Test more or less ellipsoidal, open at one end, closed at the other, the lateral walls slightly outbowed. The test membrane is about 1Á thick and is smooth. The membrane thickens around the large terminal aperture in one end of the test producing a rim-like effect. From one to five tiny rimmed "pores" or thin areas may be developed at the other end, although not always present. The ratio of length to width varies from about 1.6 to 2.5. A somewhat shrunken internal sac-like body (cyst?) is rarely present. Dimensions: Holotype, 55Á long, 31Á broad; Paratype 60Á long, 25Á broad; Range, 69 to 27Á long; 35 to 22Á. wide.
Affinities:
Drugg, 1967, p.35: This species differs from Paleostomocystis apiculata Cookson and Eisenack 1960 in the absence of spinules, and to some extent in outline as well since both sides of the upper Moreno species are equally convex.
Sr. homonym of Palaeostomocystis laevigata Jiabo, 1978. Now Fromea. Originally Palaeostomocystis, subsequently Fromea?, thirdly (and now) Fromea.
Holotype: Drugg, 1967, pl.6, fig.14
Paratype: Drugg, 1967
Locus typicus: Escarpado Canyon, California
Stratum typicum: Maastrichtian-Danian
Original diagnosis: Drugg, 1967, p.35
Test more or less ellipsoidal, open at one end, closed at the other, the lateral walls slightly outbowed. The test membrane is about 1Á thick and is smooth. The membrane thickens around the large terminal aperture in one end of the test producing a rim-like effect. From one to five tiny rimmed "pores" or thin areas may be developed at the other end, although not always present. The ratio of length to width varies from about 1.6 to 2.5. A somewhat shrunken internal sac-like body (cyst?) is rarely present. Dimensions: Holotype, 55Á long, 31Á broad; Paratype 60Á long, 25Á broad; Range, 69 to 27Á long; 35 to 22Á. wide.
Affinities:
Drugg, 1967, p.35: This species differs from Paleostomocystis apiculata Cookson and Eisenack 1960 in the absence of spinules, and to some extent in outline as well since both sides of the upper Moreno species are equally convex.