Back
Tenua capitata
Tenua capitata (Cookson and Eisenack, 1960) Gitmez and Sarjeant, 1972
NOW Barbatacysta. Originally Hystrichosphaeridium, subsequently Prolixosphaeridium, thirdly Tenua Eisenack, fourthly Batiacasphaera, fifthly (and now) Barbatacysta
Holotype: Cookson and Eisenack, 1960, pl.39, fig.9
Locus typicus: SSW of Broome, Canning Basin, Australia
Stratum typicum: Oxfordian-Kimmeridgian
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.
NOW Barbatacysta. Originally Hystrichosphaeridium, subsequently Prolixosphaeridium, thirdly Tenua Eisenack, fourthly Batiacasphaera, fifthly (and now) Barbatacysta
Holotype: Cookson and Eisenack, 1960, pl.39, fig.9
Locus typicus: SSW of Broome, Canning Basin, Australia
Stratum typicum: Oxfordian-Kimmeridgian
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.