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Evittosphaerula
From Williams et al., 2017:
[Evittosphaerula, Manum, 1979, p. 242–243. Emendation: Damassa, 1997, p. 161, 163
Type species: Evittosphaerula paratabulata, Manum, 1979 (pl.2, figs.6–10)]
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Original description: [Manum, 1979]:
Description:
Dinoflagellate cysts with a parasutural network as the sole persistent structure, reflecting a gonyaulacacean tabulation.
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Modified description:
Stover and Williams, 1987, p. 91:
Synopsis:
Cysts subspherical, consisting solely of a parasutural network of wall material whose strands indicate a gonyaulacacean paratabulation of 4`, 6", 6c, 6```, 1p, 1````, 8s.
Description:
Shape: Subspherical, often modified by folding.
Wall relationships: Differentiation of the parasutural bands into a structureless base and a fibrous part suggests two wall layers. Standard wall terminology not applicable to this genus.
Wall features: Network is parasutural; wall material absent between parasutural bands.
Archeopyle: Unusual morphology precludes archeopyle determination.
Paratabulation: Indicated by parasutural bands; gonyaulacacean, formula: 4`, 6", 6c, 6```, 1p, 1````, 8s.
Paracingulum: Indicated by six polygonally-outlined areas.
Parasulcus: Indicated by eight polygonally-outlined areas. Large size of the anterior sulcal paraplate and the number of sulcal paraplates are unusual.
Size: Intermediate to large; 70 to about 115 µm.
Affinities:
Evittosphaerula, which consists exclusively of a parasutural network without intervening wall material, has an unique morphology.
[Evittosphaerula, Manum, 1979, p. 242–243. Emendation: Damassa, 1997, p. 161, 163
Type species: Evittosphaerula paratabulata, Manum, 1979 (pl.2, figs.6–10)]
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Manum, 1979]:
Description:
Dinoflagellate cysts with a parasutural network as the sole persistent structure, reflecting a gonyaulacacean tabulation.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Modified description:
Stover and Williams, 1987, p. 91:
Synopsis:
Cysts subspherical, consisting solely of a parasutural network of wall material whose strands indicate a gonyaulacacean paratabulation of 4`, 6", 6c, 6```, 1p, 1````, 8s.
Description:
Shape: Subspherical, often modified by folding.
Wall relationships: Differentiation of the parasutural bands into a structureless base and a fibrous part suggests two wall layers. Standard wall terminology not applicable to this genus.
Wall features: Network is parasutural; wall material absent between parasutural bands.
Archeopyle: Unusual morphology precludes archeopyle determination.
Paratabulation: Indicated by parasutural bands; gonyaulacacean, formula: 4`, 6", 6c, 6```, 1p, 1````, 8s.
Paracingulum: Indicated by six polygonally-outlined areas.
Parasulcus: Indicated by eight polygonally-outlined areas. Large size of the anterior sulcal paraplate and the number of sulcal paraplates are unusual.
Size: Intermediate to large; 70 to about 115 µm.
Affinities:
Evittosphaerula, which consists exclusively of a parasutural network without intervening wall material, has an unique morphology.