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Fusiformacysta
From Williams et al., 2017:
[Fusiformacysta, Morgan, 1975, p. 161; Emendation: Riding and Helby, 2001d, p. 75.
Type species: Fusiformacysta salasii, Morgan, 1975 (pl.2, figs.4a–c)]
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Original description: [Morgan, 1975]:
Description:
Cysts are fusiform with bluntly rounded, tapered apical and single antapical horns. The autophragm is ornamented with low relief features (scabrate to punctoreticulate). Archeopyle precingular, Types 2P-?5P, and the operculum is free.
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Modified description:
Stover and Evitt, 1978, p. 156-157:
Synopsis:
Cysts biconical; autophragm ornamented with features of low relief; archeopyle precingular, Types 2P- ?5 P.
Description:
Shape: Biconical.
Wall relationships: Autophragm only.
Wall features: No parasutural features; autophragm with features of low relief.
Paratabulation: Indicated by archeopyle only.
Paracingulum: Not indicated.
Parasulcus: Not indicated.
Size: Large.
Affinities:
Fusiformacysta differs from Palaeocystodinium and Svalbardella in having a precingular rather than an intercalary archeopyle, and in possessing an autophragm only, rather than an endophragm and periphragm.
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Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Fusiformacysta Morgan, 1975. According to Morgan (1975, p.161), Fusiformacysta is fusiform with bluntly rounded, tapered apical and single antapical horns. The autophragm is ornamented with low relief features (scabrate to punctoreticulate). Archeopyle precingular, type 2P-?5P, and the operculum is free.
[Fusiformacysta, Morgan, 1975, p. 161; Emendation: Riding and Helby, 2001d, p. 75.
Type species: Fusiformacysta salasii, Morgan, 1975 (pl.2, figs.4a–c)]
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Original description: [Morgan, 1975]:
Description:
Cysts are fusiform with bluntly rounded, tapered apical and single antapical horns. The autophragm is ornamented with low relief features (scabrate to punctoreticulate). Archeopyle precingular, Types 2P-?5P, and the operculum is free.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Modified description:
Stover and Evitt, 1978, p. 156-157:
Synopsis:
Cysts biconical; autophragm ornamented with features of low relief; archeopyle precingular, Types 2P- ?5 P.
Description:
Shape: Biconical.
Wall relationships: Autophragm only.
Wall features: No parasutural features; autophragm with features of low relief.
Paratabulation: Indicated by archeopyle only.
Paracingulum: Not indicated.
Parasulcus: Not indicated.
Size: Large.
Affinities:
Fusiformacysta differs from Palaeocystodinium and Svalbardella in having a precingular rather than an intercalary archeopyle, and in possessing an autophragm only, rather than an endophragm and periphragm.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Notes:
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Fusiformacysta Morgan, 1975. According to Morgan (1975, p.161), Fusiformacysta is fusiform with bluntly rounded, tapered apical and single antapical horns. The autophragm is ornamented with low relief features (scabrate to punctoreticulate). Archeopyle precingular, type 2P-?5P, and the operculum is free.