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Deflandrea rotundata
Deflandrea rotundata Eisenack and Cookson, 1960
Now Subtilisphaera. Originally Deflandrea, subsequently (and now) Subtilisphaera.
Tax. jr. synonym of Subtilisphaera perlucida (Alberti, 1959) Jain and Millepied, 1973, according to Davey, 1974. Lentin and Williams, 1976, retained Deflandrea (as 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
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 80 Ám long, 58 Ám broad, capsule 48x46 Ám. Range 52-80 Ám long, 45-62 Ám broad.
Affinities:
Eisenack and Cookson, 1960, p.2: 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.
Now Subtilisphaera. Originally Deflandrea, subsequently (and now) Subtilisphaera.
Tax. jr. synonym of Subtilisphaera perlucida (Alberti, 1959) Jain and Millepied, 1973, according to Davey, 1974. Lentin and Williams, 1976, retained Deflandrea (as 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
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 80 Ám long, 58 Ám broad, capsule 48x46 Ám. Range 52-80 Ám long, 45-62 Ám broad.
Affinities:
Eisenack and Cookson, 1960, p.2: 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.