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Cordosphaeridium senegalense
From Fensome et al., 2019:
Cordosphaeridium senegalense Jain and Millepied, 1975, p.149, pl.5, fig.68. Holotype: Jain and Millepied, 1975, pl.5, fig.68. Originally (and now) Cordosphaeridium, subsequently Tityrosphaeridium?. Lentin and Williams (1985, p.73) retained this species in Cordosphaeridium. Age: Campanian–Maastrichtian.
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Original description: [Jain and Millepied, 1975]:
Cordosphaeridium senegalensis sp. nov. (Pl. 5, Fig. 68)
Holotype - PI. 5, Fig. 68, Slide No. 7880-3.
Type locality - Bore hole no. CM-l; depth 1044 metres; Senegal Basin, W. Africa.
Horizon - Campanian-Maestrichtian.
Diagnosis - Cyst spherical, chorate, double layered; endophragm smooth, periphragm well developed, granulate with less than 30 processes processes fibrous, variable in size and shape, hollow, dorsally open, tubiform with slightly recurved dorsal margin. Cingular processes broader, remaining slender. Tabulation typical of genus. Archaeopyle apical with one convex side, margin smooth.
Measurements
Cyst size with processes: holotype 110 μm, range 100-120 μm
Body diameter: holotype 84 μm, range 80-90 μm
Cingular processes size: holotype 28 x 10 μm, range 25-30 x 9-12 μm
Wall thickness: holotype 2 μm, range 1.5-2 μm
Comparison - Cordosphaeridium inodes (Klumpp) Eisenack (1963) described in detail by GOCHT (1969) comes nearest to C. senegalensis sp. nov. in having similar processes and shape of the cyst. But differs in having fiberous body wall and shorter processes. Present forms differ from other known species of the genus In having broader cingular processes as compared to apical, precingular, postcingular and antapical processes.
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(Original) description: Jan du Chêne, 1988, p. 155
Cyst circular to elliptical in outline, its surface densely ornamented with granulae of irregular shape, distributed over the entire surface. The paratabulation is only indicated by the position of the apical archaeopyle, Type (tA), and by secondary sutures of the archaeopyle, observable between some precingular paraplates.
Dimensions: equatorial diameter of cyst: 30-40 µm; cyst length: 32-38 µm (5 specimens measured).
Affinities:
Jan du Chêne, 1988, p. 155
The Escharisphaeridia species already known, E. pockocki (Sarjeant, 1968) Erkmen and Sarjeant, 1980, E. rudis Davies, 1983, and E. psilata Kumar, 1986, are Jurassic in age.
E. senegalense differs from these species in its small size and its coarsely granulous ornamentation.
Cordosphaeridium senegalense Jain and Millepied, 1975, p.149, pl.5, fig.68. Holotype: Jain and Millepied, 1975, pl.5, fig.68. Originally (and now) Cordosphaeridium, subsequently Tityrosphaeridium?. Lentin and Williams (1985, p.73) retained this species in Cordosphaeridium. Age: Campanian–Maastrichtian.
---------------------------------------------------------------------------------------------------
Original description: [Jain and Millepied, 1975]:
Cordosphaeridium senegalensis sp. nov. (Pl. 5, Fig. 68)
Holotype - PI. 5, Fig. 68, Slide No. 7880-3.
Type locality - Bore hole no. CM-l; depth 1044 metres; Senegal Basin, W. Africa.
Horizon - Campanian-Maestrichtian.
Diagnosis - Cyst spherical, chorate, double layered; endophragm smooth, periphragm well developed, granulate with less than 30 processes processes fibrous, variable in size and shape, hollow, dorsally open, tubiform with slightly recurved dorsal margin. Cingular processes broader, remaining slender. Tabulation typical of genus. Archaeopyle apical with one convex side, margin smooth.
Measurements
Cyst size with processes: holotype 110 μm, range 100-120 μm
Body diameter: holotype 84 μm, range 80-90 μm
Cingular processes size: holotype 28 x 10 μm, range 25-30 x 9-12 μm
Wall thickness: holotype 2 μm, range 1.5-2 μm
Comparison - Cordosphaeridium inodes (Klumpp) Eisenack (1963) described in detail by GOCHT (1969) comes nearest to C. senegalensis sp. nov. in having similar processes and shape of the cyst. But differs in having fiberous body wall and shorter processes. Present forms differ from other known species of the genus In having broader cingular processes as compared to apical, precingular, postcingular and antapical processes.
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(Original) description: Jan du Chêne, 1988, p. 155
Cyst circular to elliptical in outline, its surface densely ornamented with granulae of irregular shape, distributed over the entire surface. The paratabulation is only indicated by the position of the apical archaeopyle, Type (tA), and by secondary sutures of the archaeopyle, observable between some precingular paraplates.
Dimensions: equatorial diameter of cyst: 30-40 µm; cyst length: 32-38 µm (5 specimens measured).
Affinities:
Jan du Chêne, 1988, p. 155
The Escharisphaeridia species already known, E. pockocki (Sarjeant, 1968) Erkmen and Sarjeant, 1980, E. rudis Davies, 1983, and E. psilata Kumar, 1986, are Jurassic in age.
E. senegalense differs from these species in its small size and its coarsely granulous ornamentation.