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Filisphaera pilosa
Fillisphaera pilosa Matsuoka and Bujak, 1988
Holotype:Matsuoka and Bujak 1988, pl.3, fig.7a-b
Paratypes: Matsuoka and Bujak, 1988
Locus typicus: St. George Basin COST No. 2 well,1910-2000ft, Filisphaera pilosa Zone, St. George Basin, S Bering Sea
Stratum typicum: Pliocene
Original diagnosis: Matsuoka and Bujak, 1988, p.44-45
Spherical to subspherical proximate cyst with two distinct ornament types on the surface and with neither apical nor antapical horns; short spines densely distributed and relatively large granules scattered randomly. No ornament reflects the paratabulation except the archeopyle.
No features delimit either the paracingulum or parasulus. Archeopyle precingular, formed by the loss of paraplate 3'.
Original description: Matsuoka and Bujak, 1988, p.45
The proximate cyst is spherical to subspherical without apical or antapical projections. The cyst wall consists of a thin endophragm and thicker periphragm composed of radiating fibers. Small dark granules are sparsely and randomly distributed on the cyst surface. The remainder of the periphragm bears densely spaced short slender spines.
Processes and other features reflecting the paratabulation are lacking except for the archeopyle. The paracingulum and parasulcus are also absent. The archeopyle is trapezoidal and precingular, formed by the loss of paraplate 3'.
Dimensions: Holotype; cyst diameter 52 Ám, length of radial spines ca. 0.8 Ám, diameter of grains ca. 0.8 Ám. Range: cyst diameter 41-53 Ám. Number of speciments measured: 10.
Thecal affinities: Unknown, but possibly related to the Gonyaulax lineage based on its precingular archeopyle.
Affinities:
Matsuoka and Bujak, 1988, p.45: Filisphaera pilosa differs from F. filifera in having solid granules that are sparsely distributed on the cyst surface. F. pilosa from species of Tectatodinium and Operculodinium in possessing short fibrous spines.
Holotype:Matsuoka and Bujak 1988, pl.3, fig.7a-b
Paratypes: Matsuoka and Bujak, 1988
Locus typicus: St. George Basin COST No. 2 well,1910-2000ft, Filisphaera pilosa Zone, St. George Basin, S Bering Sea
Stratum typicum: Pliocene
Original diagnosis: Matsuoka and Bujak, 1988, p.44-45
Spherical to subspherical proximate cyst with two distinct ornament types on the surface and with neither apical nor antapical horns; short spines densely distributed and relatively large granules scattered randomly. No ornament reflects the paratabulation except the archeopyle.
No features delimit either the paracingulum or parasulus. Archeopyle precingular, formed by the loss of paraplate 3'.
Original description: Matsuoka and Bujak, 1988, p.45
The proximate cyst is spherical to subspherical without apical or antapical projections. The cyst wall consists of a thin endophragm and thicker periphragm composed of radiating fibers. Small dark granules are sparsely and randomly distributed on the cyst surface. The remainder of the periphragm bears densely spaced short slender spines.
Processes and other features reflecting the paratabulation are lacking except for the archeopyle. The paracingulum and parasulcus are also absent. The archeopyle is trapezoidal and precingular, formed by the loss of paraplate 3'.
Dimensions: Holotype; cyst diameter 52 Ám, length of radial spines ca. 0.8 Ám, diameter of grains ca. 0.8 Ám. Range: cyst diameter 41-53 Ám. Number of speciments measured: 10.
Thecal affinities: Unknown, but possibly related to the Gonyaulax lineage based on its precingular archeopyle.
Affinities:
Matsuoka and Bujak, 1988, p.45: Filisphaera pilosa differs from F. filifera in having solid granules that are sparsely distributed on the cyst surface. F. pilosa from species of Tectatodinium and Operculodinium in possessing short fibrous spines.