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Adnatosphaeridium chonetum
From Fensome et al., 2019:
Adnatosphaeridium? chonetum, (Cookson and Eisenack, 1962b, p.493, pl.4, figs.8–10) Davey, 1969a, p.171.
Holotype: Cookson and Eisenack, 1962b, pl.4, fig.8.
Originally Cannosphaeropsis?, subsequently Adnatosphaeridium, thirdly (and now) Adnatosphaeridium?. Questionable assignment: Stover and Evitt (1978, p.15).
Age: ?Cenomanian.
Locus typicus: Carnarvon Basin, Australia
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Original description as Cannosphaeropsis chonetum: [Cookson and Eisenack, 1962, p. 493]:
Description:
Shell sphaerical to subsphaerical with numerous apparently solid appendages that widen abruptly at their ends into flat membranous funnels, the rims of which may be slightly recurved. Sometimes the appendages are so numerous that they overlap one another. The ends and stalks of adjacent appendages are more or less completely connected by delicate transparent membranes, which in some examples have been partially are almost completely destroyed. The appendages frequently show a fibrillar structure but may be even.
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Emended description:
Davey, 1969, p. 171:
Description:
The shell is spherical to subspherical and bears a number of more or less tubular processes which possess bands of thickening for support. The processes are usually joined to their neighbour either along their entire length, or only distally by membranes. However, isolated tubular processes are occasionally visible. The impression obtained from most specimens is of a complex membranous network perpendicular to the shell surface. A well developed apical archaeopyle is typically present.
Dimensions:
Range of observed specimens shell diameter 27 (34.1) 46 µm, length of processes 6 (10.4) 24 µm.
Number of specimens measured, 15.
Adnatosphaeridium? chonetum, (Cookson and Eisenack, 1962b, p.493, pl.4, figs.8–10) Davey, 1969a, p.171.
Holotype: Cookson and Eisenack, 1962b, pl.4, fig.8.
Originally Cannosphaeropsis?, subsequently Adnatosphaeridium, thirdly (and now) Adnatosphaeridium?. Questionable assignment: Stover and Evitt (1978, p.15).
Age: ?Cenomanian.
Locus typicus: Carnarvon Basin, Australia
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Original description as Cannosphaeropsis chonetum: [Cookson and Eisenack, 1962, p. 493]:
Description:
Shell sphaerical to subsphaerical with numerous apparently solid appendages that widen abruptly at their ends into flat membranous funnels, the rims of which may be slightly recurved. Sometimes the appendages are so numerous that they overlap one another. The ends and stalks of adjacent appendages are more or less completely connected by delicate transparent membranes, which in some examples have been partially are almost completely destroyed. The appendages frequently show a fibrillar structure but may be even.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Emended description:
Davey, 1969, p. 171:
Description:
The shell is spherical to subspherical and bears a number of more or less tubular processes which possess bands of thickening for support. The processes are usually joined to their neighbour either along their entire length, or only distally by membranes. However, isolated tubular processes are occasionally visible. The impression obtained from most specimens is of a complex membranous network perpendicular to the shell surface. A well developed apical archaeopyle is typically present.
Dimensions:
Range of observed specimens shell diameter 27 (34.1) 46 µm, length of processes 6 (10.4) 24 µm.
Number of specimens measured, 15.