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Cordosphaeridium gracile forma areolatum
From Fensome et al., 2019:
Cordosphaeridium gracile forma areolatum (Eisenack, 1954b, p.67, pl.12, fig.21) Williams and Fensome, 2016, p.140. Holotype: Eisenack, 1954b, p.67, pl.12, fig.21. Originally Hystrichosphaeridium inodes subsp. gracile forma areolatum, subsequently (and now) Cordosphaeridium gracile forma areolatum. Williams and Fensome (2016, p.140) noted that the distinctive surface texture described by Eisenack (1954b) may be a preservational artifact, and hence they recommended that this taxon be restricted to its type. Age:
Oligocene.
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Original description (Eisenack, 1954b) [translation pkb 2025]
Some specimens had a beautifully areolated surface; these are referred to as forma areolata.
Cordosphaeridium gracile forma areolatum (Eisenack, 1954b, p.67, pl.12, fig.21) Williams and Fensome, 2016, p.140. Holotype: Eisenack, 1954b, p.67, pl.12, fig.21. Originally Hystrichosphaeridium inodes subsp. gracile forma areolatum, subsequently (and now) Cordosphaeridium gracile forma areolatum. Williams and Fensome (2016, p.140) noted that the distinctive surface texture described by Eisenack (1954b) may be a preservational artifact, and hence they recommended that this taxon be restricted to its type. Age:
Oligocene.
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Original description (Eisenack, 1954b) [translation pkb 2025]
Some specimens had a beautifully areolated surface; these are referred to as forma areolata.