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Surculosphaeridium phoenix ssp. stella
Surculosphaeridium? phoenix ssp. stella (Wetzel, 1952, p.403, pl.A, fig.4; text-fig.23) Sarjeant, 1984c, p.135. Emendation: Sarjeant, 1984c, p.135, as Surculosphaeridium phoenix subsp. stella.
NOW Surculosphaeridium? stella. Originally Hystrichosphaeridium oligacanthum subsp. stella, subsequently Baltisphaeridium oligacanthum subsp. stella (acritarch), thirdly Cleistosphaeridium? oligacanthum subsp. stella, fourthly Surculosphaeridium? phoenix subsp. stella, fifthly (and now) Surculosphaeridium? stella.
Holotype: W. Wetzel, 1952, pl.A, fig.4
Locus typicus: Kiel district, Germany
Stratum typicum: Danian
Original diagnosis: W. Wetzel, 1952, p. 403: Hystrichosphaeridium oligocanthum ssp. stella
Some specimens, which in other attributes do not differ from the typical species, are distinguishable from it in that the distal ends of the processes develop into two sideways-directed prongs (and thereby suggest more the usual structure of hystrichosphere processes). Also no noteworthy curving of the processes was observed.
Emended diagnosis: Sarjeant, 1984, p. 135
Skolochorate cysts having a spheroidal central body and a low number (19-?23) of intratabular processes. Processes of moderate thickness, hollow but closed and bifurcate distally in Y-form. Length of processes around 50 % of the cyst"s equatorial diameter. Phragma two-layered, its surface granulate to shagreenate. Archaeopyle apical (type tA), probably tetratabular.
Dimensions. Holotype (in slightly oblique lateral view, with apex lacking): length 34 µm, breath 36 µm, length of processes c. 18 µm.
NOW Surculosphaeridium? stella. Originally Hystrichosphaeridium oligacanthum subsp. stella, subsequently Baltisphaeridium oligacanthum subsp. stella (acritarch), thirdly Cleistosphaeridium? oligacanthum subsp. stella, fourthly Surculosphaeridium? phoenix subsp. stella, fifthly (and now) Surculosphaeridium? stella.
Holotype: W. Wetzel, 1952, pl.A, fig.4
Locus typicus: Kiel district, Germany
Stratum typicum: Danian
Original diagnosis: W. Wetzel, 1952, p. 403: Hystrichosphaeridium oligocanthum ssp. stella
Some specimens, which in other attributes do not differ from the typical species, are distinguishable from it in that the distal ends of the processes develop into two sideways-directed prongs (and thereby suggest more the usual structure of hystrichosphere processes). Also no noteworthy curving of the processes was observed.
Emended diagnosis: Sarjeant, 1984, p. 135
Skolochorate cysts having a spheroidal central body and a low number (19-?23) of intratabular processes. Processes of moderate thickness, hollow but closed and bifurcate distally in Y-form. Length of processes around 50 % of the cyst"s equatorial diameter. Phragma two-layered, its surface granulate to shagreenate. Archaeopyle apical (type tA), probably tetratabular.
Dimensions. Holotype (in slightly oblique lateral view, with apex lacking): length 34 µm, breath 36 µm, length of processes c. 18 µm.