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Sentusidinium millepiedii
From Fensome et al., 2019:
Sentusidinium millepiedii Fensome and Williams, 2004, p.601. Substitute name for Sentusidinium? brevispinosum (Jain and Millepied, 1975, p.150, pl.5, figs.80–82) Islam, 1993, p.87. Holotype: Jain and Millepied, 1975, pl.5, figs.80–81; Fauconnier and Masure, 2004, pl.69, fig.6. Originally Cleistosphaeridium? brevispinosum, subsequently Sentusidinium brevispinosum (combination illegitimate), thirdly Sentusidinium? brevispinosum (combination illegitimate), fourthly Sentusidinium? millepiedii, fifthly (and now) Sentusidinium millepiedii. Questionable assignment: Courtinat in Fauconnier and Masure (2004, p.486), who considered Sentusidinium brevispinosum (Jain and Millepied) to be a problematic species; however, Wood et al. (2016, p.85–86) retained this species in Sentusidinium without question. Age: Aptian.
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Original description: [Jain and Millepied, 1975]:
Cleistosphaeridium brevispinosum sp. nov. (PI. 5, Figs. 80-82)
Holotype - Pl. 5, Figs. 80-81; Slide No. 8966-3.
Type locality - Bore hole no. CM-4; depth 2918 metres; Senegal Basin, W. Africa.
Horizon-Lower - ?Upper Aptian.
Diagnosis - Shell spherical, surface moderately thick, denscly punctate; processes numerous, short, broader at base, uniform in size, tips furcate or slightly bifid, distally closed. Archacopyle apical.
Measurements
Shell diameter: holotype: 48 μm, range: 45-50 μm
Process size: holotype: 2.6 x 1.3 μm, range: 2.4-2.8 x 1-1.3 μm
Comparison - C. brevispinosum sp. nov. is characterised by its very short processes and densely punctate test surface. These features separate it from the other known species of the genus. C. multispinosum (Singh) Brideaux (1971) compares well in size and morphology but differs in not having punctate surface.
Sentusidinium millepiedii Fensome and Williams, 2004, p.601. Substitute name for Sentusidinium? brevispinosum (Jain and Millepied, 1975, p.150, pl.5, figs.80–82) Islam, 1993, p.87. Holotype: Jain and Millepied, 1975, pl.5, figs.80–81; Fauconnier and Masure, 2004, pl.69, fig.6. Originally Cleistosphaeridium? brevispinosum, subsequently Sentusidinium brevispinosum (combination illegitimate), thirdly Sentusidinium? brevispinosum (combination illegitimate), fourthly Sentusidinium? millepiedii, fifthly (and now) Sentusidinium millepiedii. Questionable assignment: Courtinat in Fauconnier and Masure (2004, p.486), who considered Sentusidinium brevispinosum (Jain and Millepied) to be a problematic species; however, Wood et al. (2016, p.85–86) retained this species in Sentusidinium without question. Age: Aptian.
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Original description: [Jain and Millepied, 1975]:
Cleistosphaeridium brevispinosum sp. nov. (PI. 5, Figs. 80-82)
Holotype - Pl. 5, Figs. 80-81; Slide No. 8966-3.
Type locality - Bore hole no. CM-4; depth 2918 metres; Senegal Basin, W. Africa.
Horizon-Lower - ?Upper Aptian.
Diagnosis - Shell spherical, surface moderately thick, denscly punctate; processes numerous, short, broader at base, uniform in size, tips furcate or slightly bifid, distally closed. Archacopyle apical.
Measurements
Shell diameter: holotype: 48 μm, range: 45-50 μm
Process size: holotype: 2.6 x 1.3 μm, range: 2.4-2.8 x 1-1.3 μm
Comparison - C. brevispinosum sp. nov. is characterised by its very short processes and densely punctate test surface. These features separate it from the other known species of the genus. C. multispinosum (Singh) Brideaux (1971) compares well in size and morphology but differs in not having punctate surface.