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Hystrichosphaeridium breviatum
Hystrichophaeridium? breviatum Morgenroth, 1966
Taxonomic senior synonym (at subspecific rank): Hystrichosphaeridium zoharyi subsp. ktana (as Polysphaeridium subtile subsp. ktana), according to Islam (1983b, p.343) - however, Masure and Foucher in Fauconnier and Masure (2004, p.309-310) retained this taxon as a questionable species of Hystrichosphaeridium.
Questionable assignment: Stover and Evitt (1978, p.56).
Holotype: Morgenroth, 1966a, pl.7, figs.11-12; Fauconnier and Masure, 2004, pl.43, figs.5-7.
Age: Early Eocene
Taxonomic senior synonym (at subspecific rank): Hystrichosphaeridium zoharyi subsp. ktana (as Polysphaeridium subtile subsp. ktana), according to Islam (1983b, p.343) - however, Masure and Foucher in Fauconnier and Masure (2004, p.309-310) retained this taxon as a questionable species of Hystrichosphaeridium.
Questionable assignment: Stover and Evitt (1978, p.56).
Holotype: Morgenroth, 1966a, pl.7, figs.11-12; Fauconnier and Masure, 2004, pl.43, figs.5-7.
Age: Early Eocene