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Subtilisphaera rotundata
Subtilisphaera rotundata (Eisenack and Cookson, 1960) Jain and Millepied, 1973
Originally Deflandrea, subsequently Subtilisphaera.
Tax. jr. synonym of Subtilisphaera perlucida (Alberti, 1959) Jain and Millepied, 1973, according to Davey, 1974; however, Lentin and Williams, 1976 retained Subtilisphaera rotundata as a separate species.
Holotype: Eisenack and Cookson, 1960, pl.1, fig.1
Locus typicus: Santo"s Oodnadatta Bore, S Australia
Stratum typicum: Albian
Original description: Eisenack and Cookson, 1960, p.2: Deflandrea rotundata
Shell somewhat flat, broadly oval in outline, divided unequally by a broad and deep circular girdle; epitheca slightly larger than the hypotheca with a broadly rounded apex; hypotheca with one or occasionally two slight antapical prolongations and a broad longitudinal furrow. Capsule almost circular in outline, not filling the shell laterally. Shell-membrane thin, smooth and transparent, wall of capsule slightly granular. A pylome has not been observed. Dimensoins: Type--80µ long, 58µ broad, capsule 48µ x 46µ. Range--52-80 µ long, 45-62µ broad.
Affinities:
Eisenack and Cookson, 1960, p.2: Deflandrea rotundata
Deflandrea rotundata differs from all other described species of the genus in the absence of an apical horn. It is relatively common in the Oodnadatta Bore sample.
Originally Deflandrea, subsequently Subtilisphaera.
Tax. jr. synonym of Subtilisphaera perlucida (Alberti, 1959) Jain and Millepied, 1973, according to Davey, 1974; however, Lentin and Williams, 1976 retained Subtilisphaera rotundata as a separate species.
Holotype: Eisenack and Cookson, 1960, pl.1, fig.1
Locus typicus: Santo"s Oodnadatta Bore, S Australia
Stratum typicum: Albian
Original description: Eisenack and Cookson, 1960, p.2: Deflandrea rotundata
Shell somewhat flat, broadly oval in outline, divided unequally by a broad and deep circular girdle; epitheca slightly larger than the hypotheca with a broadly rounded apex; hypotheca with one or occasionally two slight antapical prolongations and a broad longitudinal furrow. Capsule almost circular in outline, not filling the shell laterally. Shell-membrane thin, smooth and transparent, wall of capsule slightly granular. A pylome has not been observed. Dimensoins: Type--80µ long, 58µ broad, capsule 48µ x 46µ. Range--52-80 µ long, 45-62µ broad.
Affinities:
Eisenack and Cookson, 1960, p.2: Deflandrea rotundata
Deflandrea rotundata differs from all other described species of the genus in the absence of an apical horn. It is relatively common in the Oodnadatta Bore sample.