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Turbiosphaera galatea
From Fensome et al., 2019:
Turbiosphaera galatea Eaton, 1976, p.289, pl.15, figs.4–6.
Holotype: Eaton, 1976, pl.15, fig.4; Bujak et al., 1980, pl.6, figs.1–2. NIA.
Locus typicus: Bracklesham Beds, Alum Bay, Isle of Wight, England.
Stratum typicum: Early Eocene
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Original diagnosis: Eaton, 1976, p. 289
Cyst body subcircular or oval in outline. Apical horn and delicate intratabular processes formed by the fibrous periphragm. Processes vary from discrete, with an undulating distal margin, to typically vague, due to their delicate appearance and the development of fibrous proximal membrane. They show considerable variation in breadth. Processes reflect the precingular, cingular, postcingular and antapical zones. Antapical process similar in form to the other processes, but longer, and proximally united with the postcingular processes. Apical horn broad, triangular in form, and showing considerable proximal expansion. Fibrous proximal membrane frequently unites processes in adjacent tabulation zones. Archaeopyle precingular, formed by displacement of plate 3".
Dimensions: Holotype: overall 115 X 84 µm; cyst body 75 x 63 µm; length of processes up to 19 µm; length of apical horn 23 µm; length of antapical process 22 µm. Observed range: overall 104 x 68 µm to 130 x 84 µm; cyst body 60 x 44 µm to 80 x 75 µm; length of processes up to 20 µm; length of apical horn up to 30 µm; length of antapical process up to 26 µm. (n = 10).
Affinities:
Eaton, 1976, p. 289: The considerable proximal expansion of the apical horn may include apical processes. The delicate appearance and typically vague definition of the processes precludes the determination of their exact number. When discrete processes are developed there appears to be one broad process per plate area, and more than one process per plate area when the processes are slender. The delicacy of its processes and the form of its apical horn distinguish T. galatea from T. filosa (Wilson) Archangelsky 1968.
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G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Turbiosphaera galatea Eaton, 1976. Diagnosis from Eaton (1976, p.289), cyst body subcircular or oval in outline. Apical horn and delicate intratabular processes formed by the fibrous periphragm. Processes vary from discrete, with an undulating distal margin, to typically vague, due to their delicate appearance and the development of fibrous proximal membrane. They show considerable variation in breadth. Processes reflect the precingular, cingular, postcingular and antapical zones. Antapical process similar in form to the other processes, but longer, and proximally united with the postcingular processes. Apical horn broad, triangular in form and showing considerable proximal expansion. Fibrous proximal membrane frequently unites processes in adjacent tabulation zones. Archeopyle precingular formed by displacement of 3". Size: overall 104 x 68 µm to 130 x 84 µm, cyst body 60 x 44 to 80 x 75 µm, length of processes up to 20 µm, length of apical horn up to 30 µm, length of antapical horn up to 26 µm.
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Turbiosphaera galatea Eaton, 1976, p.289, pl.15, figs.4–6.
Holotype: Eaton, 1976, pl.15, fig.4; Bujak et al., 1980, pl.6, figs.1–2. NIA.
Locus typicus: Bracklesham Beds, Alum Bay, Isle of Wight, England.
Stratum typicum: Early Eocene
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Original diagnosis: Eaton, 1976, p. 289
Cyst body subcircular or oval in outline. Apical horn and delicate intratabular processes formed by the fibrous periphragm. Processes vary from discrete, with an undulating distal margin, to typically vague, due to their delicate appearance and the development of fibrous proximal membrane. They show considerable variation in breadth. Processes reflect the precingular, cingular, postcingular and antapical zones. Antapical process similar in form to the other processes, but longer, and proximally united with the postcingular processes. Apical horn broad, triangular in form, and showing considerable proximal expansion. Fibrous proximal membrane frequently unites processes in adjacent tabulation zones. Archaeopyle precingular, formed by displacement of plate 3".
Dimensions: Holotype: overall 115 X 84 µm; cyst body 75 x 63 µm; length of processes up to 19 µm; length of apical horn 23 µm; length of antapical process 22 µm. Observed range: overall 104 x 68 µm to 130 x 84 µm; cyst body 60 x 44 µm to 80 x 75 µm; length of processes up to 20 µm; length of apical horn up to 30 µm; length of antapical process up to 26 µm. (n = 10).
Affinities:
Eaton, 1976, p. 289: The considerable proximal expansion of the apical horn may include apical processes. The delicate appearance and typically vague definition of the processes precludes the determination of their exact number. When discrete processes are developed there appears to be one broad process per plate area, and more than one process per plate area when the processes are slender. The delicacy of its processes and the form of its apical horn distinguish T. galatea from T. filosa (Wilson) Archangelsky 1968.
--------------------------------------------------
G.L. Williams short notes on species, Mesozoic-Cenozoic dinocyst course, Urbino, Italy, May 17-22, 1999 - LPP VIEWER CD-ROM 99.5.
Turbiosphaera galatea Eaton, 1976. Diagnosis from Eaton (1976, p.289), cyst body subcircular or oval in outline. Apical horn and delicate intratabular processes formed by the fibrous periphragm. Processes vary from discrete, with an undulating distal margin, to typically vague, due to their delicate appearance and the development of fibrous proximal membrane. They show considerable variation in breadth. Processes reflect the precingular, cingular, postcingular and antapical zones. Antapical process similar in form to the other processes, but longer, and proximally united with the postcingular processes. Apical horn broad, triangular in form and showing considerable proximal expansion. Fibrous proximal membrane frequently unites processes in adjacent tabulation zones. Archeopyle precingular formed by displacement of 3". Size: overall 104 x 68 µm to 130 x 84 µm, cyst body 60 x 44 to 80 x 75 µm, length of processes up to 20 µm, length of apical horn up to 30 µm, length of antapical horn up to 26 µm.
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