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Adnatosphaeridium filamentosum
From Williams, Lentin and Fensome 1998 - Lentin and Williams Index of Fossil Dinoflagellates:
[Adnatosphaeridium filamentosum, (Cookson and Eisenack, 1958, p. 47-48, pl.7, figs.8-9; pl.8, figs.1-2), Williams and Downie, 1969, p. 17.
NOW Rigaudella. Originally Cannosphaeropsis, subsequently Adnatosphaeridium, thirdly (and now) Rigaudella.
Tax. jr. syn.: Cannosphaeropsis perforata, according to Stancliffe and Sarjeant (1990, p.206).
This combination was not validly published in Williams and Downie (1966c, p.218), since these authors did not fully reference the basionym.
Holotype: Cookson and Eisenack, 1958, pl.7, fig.9. ]
Locus typicus: Carnavron Basin, W Australia
Stratum typicum: Middle-Late Jurassic
Age: Mid-Late Jurassic
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Original description as Cannosphaeropsis filamentosa: [Cookson and Eisenack, 1958, p. 47]:
Description:
Shell approximately sphaerical, provided with a varying number of thin, solid processes which branch distally, sometimes in a fan-shaped manner, to form by their coalescence an open or sometimes dense enveloping network.
Dimensions:
Holotype - overall diameter 124 µm, shell 48 µm.
Affinities:
C. filamentosa is distinct from C. aemula in that the processes supporting the enveloping network are more uniform in size and never possess the hollow extremities of that species.
[Adnatosphaeridium filamentosum, (Cookson and Eisenack, 1958, p. 47-48, pl.7, figs.8-9; pl.8, figs.1-2), Williams and Downie, 1969, p. 17.
NOW Rigaudella. Originally Cannosphaeropsis, subsequently Adnatosphaeridium, thirdly (and now) Rigaudella.
Tax. jr. syn.: Cannosphaeropsis perforata, according to Stancliffe and Sarjeant (1990, p.206).
This combination was not validly published in Williams and Downie (1966c, p.218), since these authors did not fully reference the basionym.
Holotype: Cookson and Eisenack, 1958, pl.7, fig.9. ]
Locus typicus: Carnavron Basin, W Australia
Stratum typicum: Middle-Late Jurassic
Age: Mid-Late Jurassic
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Original description as Cannosphaeropsis filamentosa: [Cookson and Eisenack, 1958, p. 47]:
Description:
Shell approximately sphaerical, provided with a varying number of thin, solid processes which branch distally, sometimes in a fan-shaped manner, to form by their coalescence an open or sometimes dense enveloping network.
Dimensions:
Holotype - overall diameter 124 µm, shell 48 µm.
Affinities:
C. filamentosa is distinct from C. aemula in that the processes supporting the enveloping network are more uniform in size and never possess the hollow extremities of that species.