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Cleistosphaeridium elegantulum
From Fensome et al., 2019:
Fensome et al., 2016b, p.36–37, pl.4, figs.10–12. Holotype: Fensome et al., 2016b, pl.4, fig.12. Age: last occurrence, Lutetian–Bartonian.
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Original description Fensome et al., 2016b:
Holotype. Plate 4, fig. 12, from a cuttings sample at 2286.03 to 2295.17 m in Karlsefni A-13, GSC type collection no. 138033, sample P39600, slide 01, coordinates 17.9 × 101.7, England Finder S44.2. Central body maximum diameter 50 μm, maximum length of processes about 25 μm. The age determined for the sample from which the holotype was recovered is Lutetian–Bartonian.
Etymology. From the Latin elegantulus (very fine), in reference to the narrow, long processes.
Diagnosis. A species of Cleistosphaeridium with numerous long, fine, flexible, unconnected processes, some to many of which are dolabrate distally. The length of many of the processes equals about one half of the central body diameter. Proximal ridges are absent to weakly developed.
Size. Central body diameter 30‒57 μm; maximum length of processes up to half maximum diameter of central body; three specimens measured.
Age. LO: Lutetian‒Bartonian. Not plotted.
Remarks. This species differs from other species of Cleistosphaeridium in its long, fine, flexible processes.
Fensome et al., 2016b, p.36–37, pl.4, figs.10–12. Holotype: Fensome et al., 2016b, pl.4, fig.12. Age: last occurrence, Lutetian–Bartonian.
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Original description Fensome et al., 2016b:
Holotype. Plate 4, fig. 12, from a cuttings sample at 2286.03 to 2295.17 m in Karlsefni A-13, GSC type collection no. 138033, sample P39600, slide 01, coordinates 17.9 × 101.7, England Finder S44.2. Central body maximum diameter 50 μm, maximum length of processes about 25 μm. The age determined for the sample from which the holotype was recovered is Lutetian–Bartonian.
Etymology. From the Latin elegantulus (very fine), in reference to the narrow, long processes.
Diagnosis. A species of Cleistosphaeridium with numerous long, fine, flexible, unconnected processes, some to many of which are dolabrate distally. The length of many of the processes equals about one half of the central body diameter. Proximal ridges are absent to weakly developed.
Size. Central body diameter 30‒57 μm; maximum length of processes up to half maximum diameter of central body; three specimens measured.
Age. LO: Lutetian‒Bartonian. Not plotted.
Remarks. This species differs from other species of Cleistosphaeridium in its long, fine, flexible processes.