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Downiesphaeridium aciculare
Downiesphaeridium aciculare (Davey, 1969) Islam, 1993
Originally Cleistosphaeridium, subsequently Downiesphaeridium, thirdly (and now) Downiesphaeridium?. Questionable assignment: Masure in Fauconnier and Masure (2004, p.196).
Holotype: Davey, 1969, pl.6, fig.12
Locus typicus: Saskatchewan, Canada
Stratum typicum: Cenomanian
Original description: Davey, 1969, p. 158: Cleistosphaeridium aciculare
Shell spherical to subsphcrical; shell wall of moderate thickness, densely granular. Processes numerous, finely to broadly acuminate, slightly flexuous, less than one-third of shell diameter in length.
Dimensions: diameter of central body 32(43)54 Ám, maximum length of processes 8(13.9)21 Ám.
Original descrption: Davey, 1969, p. 158: Cleistosphaeridium aciculare
The processes may be finely or broadly acuminate but on each individual their width is constant. On individuals bearing fine processes these are more densely packed than in individuals with broad processes. All intergradations exist between the fine and the broad processed forms. The processes are always pointed distally and occasionally bear small subsidiary spines near their extremities. An archaeopyle has never been observed.
Originally Cleistosphaeridium, subsequently Downiesphaeridium, thirdly (and now) Downiesphaeridium?. Questionable assignment: Masure in Fauconnier and Masure (2004, p.196).
Holotype: Davey, 1969, pl.6, fig.12
Locus typicus: Saskatchewan, Canada
Stratum typicum: Cenomanian
Original description: Davey, 1969, p. 158: Cleistosphaeridium aciculare
Shell spherical to subsphcrical; shell wall of moderate thickness, densely granular. Processes numerous, finely to broadly acuminate, slightly flexuous, less than one-third of shell diameter in length.
Dimensions: diameter of central body 32(43)54 Ám, maximum length of processes 8(13.9)21 Ám.
Original descrption: Davey, 1969, p. 158: Cleistosphaeridium aciculare
The processes may be finely or broadly acuminate but on each individual their width is constant. On individuals bearing fine processes these are more densely packed than in individuals with broad processes. All intergradations exist between the fine and the broad processed forms. The processes are always pointed distally and occasionally bear small subsidiary spines near their extremities. An archaeopyle has never been observed.