Filisphaera minuta Strauss and Lund, 1992

Holotype: Strauss and Lund, 1992, pl.1, figs.5-6
Paratype: Strauss and Lund, 1992
Locus typicus: Papendorf sand pit (Schleswig-Holstein), Germany
Stratum typicum: Miocene (Langenfeldian)

Original diagnosis: Strauss and Lund, 1992, p.162
A small species of Filisphaera with a thin-walled and subsphaerical cyst-body. The wall structure is typically microreticulate-columellate. The archaeopyle is of type P, probably 3', the operculum is free.
Dimensions: Cyst diameter range: 35...43 Ám (12 specimen measured)

Affinities:
Strauss and Lund, 1992, p.162: Under the light microscope this species shows the microreticulate-columellate wall structure of apparently radiating structures, which is typical for the genus (Bujak 1984, p. 185). The internal wall structures are relatively coarse in comparison to the fibre-like structure of F. filifera and simulate a coarser microreticulate to granulate wall structure in surface focus. F. minuta is differentiated from F. filifera by its characteristically small size (35...43 Ám in comparison to 45...60 Ám of F. filifera) and its coarser microreticulate-columellate wall structure.
The archaeopyle is formed by the consistent loss of a single precingular paraplate (probably 3").