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Tenua capitata
From Fensome et al., 2019:
Tenua capitata (Cookson and Eisenack, 1960b, p.252, pl.39, fig.9) Gitmez and Sarjeant, 1972, p.189.
Holotype: Cookson and Eisenack, 1960b, pl.39, fig.9; Fauconnier and Masure, 2004, pl.66, fig.1.
NOW Sentusidinium. Originally Hystrichosphaeridium, subsequently Prolixosphaeridium, thirdly Tenua Eisenack, fourthly Batiacasphaera, fifthly Barbatacysta, sixthly (and now) Sentusidinium.
Taxonomic junior synonyms: Barbatacysta creberbarbatum, according to Wood et al. (2016, p.84); and Sentusidinium parvum (which see), by implication.
Locus typicus: SSW of Broome, Canning Basin, Australia
Stratum typicum: Oxfordian-Kimmeridgian
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Original description: Cookson and Eisenack, 1960, p.252: Hystrichsphaeridium capitatum
Shell cylindrical with rounded ends, densely covered with short, solid appandages with capitate or somewhat bifurcateends and an opening by the complete detachment of one end of the shell.
Dimensions: Holotype: 64 µm long, 42 µm broad, overall 72x50 µm. Range of shell 64-66 x 28-44 µm.
Supplemental description: Gitmez and Sarjeant, 1972, p.189
Cyst spherical to elongate, with an apical archaeopyle and rounded antapex, bearing processes whose length sometimes reaches to one-third of the shell breadth and which number around fifty. The processes are hollow, capitate or briefly bifurcate, their distribution appearing random.
Affinities:
Cookson and Eisenack, 1960, p.252: Hystrichsphaeridium capitatum
H. capitatum seems distinct from all described species of Hystrichosphaeridium with elongate shells; the appandages show some similarity to those of H. intermedia? O.Wetzel.
Tenua capitata (Cookson and Eisenack, 1960b, p.252, pl.39, fig.9) Gitmez and Sarjeant, 1972, p.189.
Holotype: Cookson and Eisenack, 1960b, pl.39, fig.9; Fauconnier and Masure, 2004, pl.66, fig.1.
NOW Sentusidinium. Originally Hystrichosphaeridium, subsequently Prolixosphaeridium, thirdly Tenua Eisenack, fourthly Batiacasphaera, fifthly Barbatacysta, sixthly (and now) Sentusidinium.
Taxonomic junior synonyms: Barbatacysta creberbarbatum, according to Wood et al. (2016, p.84); and Sentusidinium parvum (which see), by implication.
Locus typicus: SSW of Broome, Canning Basin, Australia
Stratum typicum: Oxfordian-Kimmeridgian
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Original description: Cookson and Eisenack, 1960, p.252: Hystrichsphaeridium capitatum
Shell cylindrical with rounded ends, densely covered with short, solid appandages with capitate or somewhat bifurcateends and an opening by the complete detachment of one end of the shell.
Dimensions: Holotype: 64 µm long, 42 µm broad, overall 72x50 µm. Range of shell 64-66 x 28-44 µm.
Supplemental description: Gitmez and Sarjeant, 1972, p.189
Cyst spherical to elongate, with an apical archaeopyle and rounded antapex, bearing processes whose length sometimes reaches to one-third of the shell breadth and which number around fifty. The processes are hollow, capitate or briefly bifurcate, their distribution appearing random.
Affinities:
Cookson and Eisenack, 1960, p.252: Hystrichsphaeridium capitatum
H. capitatum seems distinct from all described species of Hystrichosphaeridium with elongate shells; the appandages show some similarity to those of H. intermedia? O.Wetzel.