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Prolixosphaeridium
From Williams et al., 2017:
[Prolixosphaeridium, Davey et al., 1966, p. 171; Emendations: Davey, 1969a, p. 160
Type species: Prolixosphaeridium deirense, Davey et al., 1966 (pl.3, fig.2; text-fig.45)] ; Davey et al., 1969; emend. Harding, 1990
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Original description: [Davey et al., 1966]:
Diagnosis:
Shell shape elongate ovoidal to ellipsoidal, one pole (apical) typically lost in archaeopyle formation. Opposite pole occupied by on or two antapical processes. Remaining processes arranged in distinct rows encircling test; these rows slightly offset at a position corresponding to sulcus. Number of processes exceeding 30. Processes closed proximally, closed or open distally; their distal terminations simple; flaring in varied fashion; or briefly furcate. Shell surface bearing cover of coarse granulaes or very short, simple spinelets, or lacking such ornamentation.
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Emended description:
Davey, 1969:
Diagnosis:
Shel elongate ovoidal to ellipsoidal, one pole (apical) typically lost in archaeopyle formation. Opposite pole occupied by one or two antapical processes. Remaining processes arranged in distinct rows, encircling shell and slightly offset at a position corresponding to sulcus. Number of processes exceeds 30. Processes closed proximally, typically but not constantly closed distally; their distal terminations simple, flaring in varied fashion, or briefly furcate. Shell surface sometimes bears cover of coarse granules or very short, simple spinelets.
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Modified description:
Stover and Evitt, 1978, p. 77:
Synopsis:
Cysts proximochorate to skolochorate, body elongate ellipsoidal with numerous nontabular processes that are normally simple and closed distally; archaeopyle apical, type tA.
Description:
Shape: Body elongate ellipsoidal.
Wall relationships: Autophragm only.
Wall features: No parasutural features. Autophragm with numerous processes that are normally simple with closed tips; surface between processes smooth, granulate, or spinulate.
Paratabulation: Typically indicated by archaeopyle only; occasionally suggested by vague alignment of processes.
Archaeopyle: Apical, Type tA; operculum free.
Paracingulum: Generally not indicated; position may be suggested by vague alignment of processes or by a transverse, band-like area devoid of processes.
Parasulcus: Not indicated.
Size: Small to large.
Affinities:
Prolixosphaeridium differs from Tanyosphaeridium in having processes that are typically closed distally rather than open distally, and from Peridictyocysta in not having the processes connected distally by trabeculae.
[Prolixosphaeridium, Davey et al., 1966, p. 171; Emendations: Davey, 1969a, p. 160
Type species: Prolixosphaeridium deirense, Davey et al., 1966 (pl.3, fig.2; text-fig.45)] ; Davey et al., 1969; emend. Harding, 1990
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Original description: [Davey et al., 1966]:
Diagnosis:
Shell shape elongate ovoidal to ellipsoidal, one pole (apical) typically lost in archaeopyle formation. Opposite pole occupied by on or two antapical processes. Remaining processes arranged in distinct rows encircling test; these rows slightly offset at a position corresponding to sulcus. Number of processes exceeding 30. Processes closed proximally, closed or open distally; their distal terminations simple; flaring in varied fashion; or briefly furcate. Shell surface bearing cover of coarse granulaes or very short, simple spinelets, or lacking such ornamentation.
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Emended description:
Davey, 1969:
Diagnosis:
Shel elongate ovoidal to ellipsoidal, one pole (apical) typically lost in archaeopyle formation. Opposite pole occupied by one or two antapical processes. Remaining processes arranged in distinct rows, encircling shell and slightly offset at a position corresponding to sulcus. Number of processes exceeds 30. Processes closed proximally, typically but not constantly closed distally; their distal terminations simple, flaring in varied fashion, or briefly furcate. Shell surface sometimes bears cover of coarse granules or very short, simple spinelets.
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Modified description:
Stover and Evitt, 1978, p. 77:
Synopsis:
Cysts proximochorate to skolochorate, body elongate ellipsoidal with numerous nontabular processes that are normally simple and closed distally; archaeopyle apical, type tA.
Description:
Shape: Body elongate ellipsoidal.
Wall relationships: Autophragm only.
Wall features: No parasutural features. Autophragm with numerous processes that are normally simple with closed tips; surface between processes smooth, granulate, or spinulate.
Paratabulation: Typically indicated by archaeopyle only; occasionally suggested by vague alignment of processes.
Archaeopyle: Apical, Type tA; operculum free.
Paracingulum: Generally not indicated; position may be suggested by vague alignment of processes or by a transverse, band-like area devoid of processes.
Parasulcus: Not indicated.
Size: Small to large.
Affinities:
Prolixosphaeridium differs from Tanyosphaeridium in having processes that are typically closed distally rather than open distally, and from Peridictyocysta in not having the processes connected distally by trabeculae.