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Amphorosphaeridium bipolare
From Fensome et al., 2019:
Amphorosphaeridium bipolare, (Cookson and Eisenack, 1965b, p.135, pl.16, figs.7–8) Davey, 1969c, p.35.
Holotype: Cookson and Eisenack, 1965b, pl.16, fig.8.
NOW Fibrocysta.
Originally Cordosphaeridium, subsequently Lanternosphaeridium, thirdly Amphorosphaeridium, fourthly (and now) Fibrocysta.
Age: Early Eocene.
Locus typicus: North bank of the Glenelg River, southeast corner of the Parish of Drajurk, 9 miles southwest of Casterton, southwestern Victoria, Australia
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Original description as Cordosphaeridium bipolare: [Cookson and Eisenack, 1965, p.135]:
Description:
Shell typically oval, well-covered with narrow, solid, unbranched appendages of varying length, and width. Usually the appendages narrow somewhat from broadish bases to widen distally to shallow funnel-shaped apices, the recurved edges of which may bear minute hair-like branches. In the larger appendages fine, longitudinal fibrils may be seen. The shell is bipolar, being characterized by the development of a distinctive apical and antapical appendage. The apical appendage is relatively short and broad, solid, densely granular and with a bluntish tip. It may be simple or with one or two short, slender, lateral branches. In the type specimen ([Cookson and Eisenack, 1965] Pl. 16, fig. 8) it appears to be connected with three broad, flattened, longitudinally striated appendages. The antapical appendage is longer than the neighbouring ones, unstriated, unbranched with approximately straight sides and a pointed tip.
The surface of the shell is densely granular with a linear arrangement evident near the bases of the appendages.
A large archeopyle extends from close to the apical pole to the equatorial region of one surface.
Dimensions:
Holotype: overall length 128 µm, overall width 90 µm, central body 80 x 62 µm, length of apical appendage 17 µm, length of antapical appendage 29 µm. Range: overall length 124-128 µm, overall width 88-98 µm, central body 80-90 x 57-70 µm, length of apical appendage 12-17 µm, length of antapical appendage 20-33 µm.
Amphorosphaeridium bipolare, (Cookson and Eisenack, 1965b, p.135, pl.16, figs.7–8) Davey, 1969c, p.35.
Holotype: Cookson and Eisenack, 1965b, pl.16, fig.8.
NOW Fibrocysta.
Originally Cordosphaeridium, subsequently Lanternosphaeridium, thirdly Amphorosphaeridium, fourthly (and now) Fibrocysta.
Age: Early Eocene.
Locus typicus: North bank of the Glenelg River, southeast corner of the Parish of Drajurk, 9 miles southwest of Casterton, southwestern Victoria, Australia
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Original description as Cordosphaeridium bipolare: [Cookson and Eisenack, 1965, p.135]:
Description:
Shell typically oval, well-covered with narrow, solid, unbranched appendages of varying length, and width. Usually the appendages narrow somewhat from broadish bases to widen distally to shallow funnel-shaped apices, the recurved edges of which may bear minute hair-like branches. In the larger appendages fine, longitudinal fibrils may be seen. The shell is bipolar, being characterized by the development of a distinctive apical and antapical appendage. The apical appendage is relatively short and broad, solid, densely granular and with a bluntish tip. It may be simple or with one or two short, slender, lateral branches. In the type specimen ([Cookson and Eisenack, 1965] Pl. 16, fig. 8) it appears to be connected with three broad, flattened, longitudinally striated appendages. The antapical appendage is longer than the neighbouring ones, unstriated, unbranched with approximately straight sides and a pointed tip.
The surface of the shell is densely granular with a linear arrangement evident near the bases of the appendages.
A large archeopyle extends from close to the apical pole to the equatorial region of one surface.
Dimensions:
Holotype: overall length 128 µm, overall width 90 µm, central body 80 x 62 µm, length of apical appendage 17 µm, length of antapical appendage 29 µm. Range: overall length 124-128 µm, overall width 88-98 µm, central body 80-90 x 57-70 µm, length of apical appendage 12-17 µm, length of antapical appendage 20-33 µm.