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Peridictyocysta
From Williams et al., 2017:
[Peridictyocysta, Cookson and Eisenack, 1974, p. 70
Type species: originally as Cannosphaeropsis mirabilis, Cookson and Eisenack, 1958 (pl.8, fig.3)] ; Peridictyocysta mirabilis, Cookson and Eisenack, 1974
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Original description: [Cookson and Eisenack, 1974]: (Translation: Stover and Evitt, 1978, p. 73):
Description:
Central shell elongate-oval, with several approximately longitudinal rows of solid braces of about equal length that are perpendicular to the surface, and branched distally with the branches connecting with one another. The central shell is thereby surrounded by a wide-mesh network, comparable to the network of a species of Cannosphaeropsis. The central body opens by the release of an apical cap and includes the network of the cap as well.
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Modified description:
Stover and Evitt, 1978, p. 73:
Synopsis:
Cysts proximochorate, elongate ellipsoidal; autophragm bears longitudinal rows of solid processes whose branched tips are interconnected distally by trabeculae; archeopyle apical, Type (tA).
Description:
Shape: Body elongate ellipsoidal.
Wall relationships: Autophragm widely separated from trabecular ectophragm.
Wall features: No clearly discernible parasutural features. Processes solid, arranged in distinct longitudinal rows, with the branches from process tips interconnected distally to form wide-mesh network (ectophragm); autophragm smooth.
Paratabulation: No clear indications, despite the arrangement of processes into rows and a tendency for alignment into transverse series.
Archeopyle: Apical, probably Type (tA); exact trace of archeopyle margin unknown; operculum free.
Paracingulum: Not indicated, unless by approximate transverse alignment of equatorial processes.
Parasulcus: Not indicated.
Size: Intermediate to large.
Affinities:
Peridictyocysta differs from Distatodinium, Tanyosphaeridium, and Prolixosphaeridium, which also have elongate ellipsoidal bodies and processes, in having the branches of the processes interconnected distally by trabeculae.
[Peridictyocysta, Cookson and Eisenack, 1974, p. 70
Type species: originally as Cannosphaeropsis mirabilis, Cookson and Eisenack, 1958 (pl.8, fig.3)] ; Peridictyocysta mirabilis, Cookson and Eisenack, 1974
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Original description: [Cookson and Eisenack, 1974]: (Translation: Stover and Evitt, 1978, p. 73):
Description:
Central shell elongate-oval, with several approximately longitudinal rows of solid braces of about equal length that are perpendicular to the surface, and branched distally with the branches connecting with one another. The central shell is thereby surrounded by a wide-mesh network, comparable to the network of a species of Cannosphaeropsis. The central body opens by the release of an apical cap and includes the network of the cap as well.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Modified description:
Stover and Evitt, 1978, p. 73:
Synopsis:
Cysts proximochorate, elongate ellipsoidal; autophragm bears longitudinal rows of solid processes whose branched tips are interconnected distally by trabeculae; archeopyle apical, Type (tA).
Description:
Shape: Body elongate ellipsoidal.
Wall relationships: Autophragm widely separated from trabecular ectophragm.
Wall features: No clearly discernible parasutural features. Processes solid, arranged in distinct longitudinal rows, with the branches from process tips interconnected distally to form wide-mesh network (ectophragm); autophragm smooth.
Paratabulation: No clear indications, despite the arrangement of processes into rows and a tendency for alignment into transverse series.
Archeopyle: Apical, probably Type (tA); exact trace of archeopyle margin unknown; operculum free.
Paracingulum: Not indicated, unless by approximate transverse alignment of equatorial processes.
Parasulcus: Not indicated.
Size: Intermediate to large.
Affinities:
Peridictyocysta differs from Distatodinium, Tanyosphaeridium, and Prolixosphaeridium, which also have elongate ellipsoidal bodies and processes, in having the branches of the processes interconnected distally by trabeculae.