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Talladinium pellis
From Fensome et al., 2019:
Fensome et al., 2016b, p.71, pl.14, figs.11–12,16. Holotype: Fensome et al., 2016b, pl.14, figs.11–12. NIA.
Age: youngest occurrence, Priabonian.
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Original description Fensome et al., 2016b:
Holotype. Plate 14, figs 11, 12, from a cuttings sample at 1840 m in Gjoa O-37, GSC type collection no. 138082, sample YD16082, slide 03, coordinates 050 × 0907, England Finder E20/3. Size: pericyst length 94 μm, width 76 μm; endocyst length 61 μm, width 57 μm. The age determined for the sample from which the holotype was recovered is late Ypresian.
Etymology. The epithet is from the Latin pellis, meaning skin, in reference to the ectophragm, which surrounds most of the pericyst. It is a noun in apposition.
Diagnosis. A species of Talladinium in which processes of individual plates are distally united by a membrane that mimics the outline of the underlying plate. The ectophragm may be irregularly or regularly perforate.
Size. Pericyst length 89‒94 μm, width 76‒81 μm; endocyst length 61 μm (both specimens), width 57‒64 μm; two specimens measured.
Age. LO: Priabonian.
Remarks. The ectophragmal membranes in Talladinium pellis form linear complexes that mirror the outline of the reflected plates, rather than forming a shield-like covering as in Talladinium? clathratum. This difference is not always easy to determine. Charlesdowniea coleothrypta has identical ornamentation but differs in having an equiepeliform archaeopyle.
Fensome et al., 2016b, p.71, pl.14, figs.11–12,16. Holotype: Fensome et al., 2016b, pl.14, figs.11–12. NIA.
Age: youngest occurrence, Priabonian.
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Original description Fensome et al., 2016b:
Holotype. Plate 14, figs 11, 12, from a cuttings sample at 1840 m in Gjoa O-37, GSC type collection no. 138082, sample YD16082, slide 03, coordinates 050 × 0907, England Finder E20/3. Size: pericyst length 94 μm, width 76 μm; endocyst length 61 μm, width 57 μm. The age determined for the sample from which the holotype was recovered is late Ypresian.
Etymology. The epithet is from the Latin pellis, meaning skin, in reference to the ectophragm, which surrounds most of the pericyst. It is a noun in apposition.
Diagnosis. A species of Talladinium in which processes of individual plates are distally united by a membrane that mimics the outline of the underlying plate. The ectophragm may be irregularly or regularly perforate.
Size. Pericyst length 89‒94 μm, width 76‒81 μm; endocyst length 61 μm (both specimens), width 57‒64 μm; two specimens measured.
Age. LO: Priabonian.
Remarks. The ectophragmal membranes in Talladinium pellis form linear complexes that mirror the outline of the reflected plates, rather than forming a shield-like covering as in Talladinium? clathratum. This difference is not always easy to determine. Charlesdowniea coleothrypta has identical ornamentation but differs in having an equiepeliform archaeopyle.