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Hystrichosphaeridium calvum
Hystrichosphaeridium calvum Tasch, 1964
Stover and Evitt, 1978, considered this to be a problematical species of Hystrichosphaeridium.
Holotype: Tasch et al., 1964, pl.1, fig.21; Fauconnier and Masure, 2004, pl.43, figs.9-10.
Locus typicus: Clark County, Kansas, U.S.A.
Stratum typicum: Albian
Original diagnosis: Tasch, 1964, p.193
Ovate shell characterized by sparsity of processes; processes consist of stubby or elongate barbs and a few, thin, brief, seta-like projections.
Dimensions: Holotype: Length 52 Ám; width 40 Ám; maximum length of seta-like projections 8 Ám.
Stover and Evitt, 1978, considered this to be a problematical species of Hystrichosphaeridium.
Holotype: Tasch et al., 1964, pl.1, fig.21; Fauconnier and Masure, 2004, pl.43, figs.9-10.
Locus typicus: Clark County, Kansas, U.S.A.
Stratum typicum: Albian
Original diagnosis: Tasch, 1964, p.193
Ovate shell characterized by sparsity of processes; processes consist of stubby or elongate barbs and a few, thin, brief, seta-like projections.
Dimensions: Holotype: Length 52 Ám; width 40 Ám; maximum length of seta-like projections 8 Ám.