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Prolixosphaeridium granulosum
From Fensome et al., 2019:
Prolixosphaeridium granulosum (Deflandre, 1937b, p.77, pl.16 [also labelled pl.13], fig.4) Davey et al., 1966, p.172. Holotype: Deflandre, 1937b, pl.16 (also labelled pl.13), fig.4; Fauconnier and Masure, 2004, pl.66, fig.4. Originally Hystrichosphaeridium xanthiopyxides var. granulosum, subsequently Baltisphaeridium xanthiopyxides var. granulosum (combination not validly published, Appendix A), thirdly Baltisphaeridium granulosum (Appendix A), fourthly (and now) Prolixosphaeridium granulosum. Taxonomic junior synonyms (at specific rank): Baltisphaeridium pilosum var. longispinosum (as Tenua pilosa subsp. longispinosa), according to Sarjeant (1976c, p.19) — however, Erkmen and Sarjeant (1980, p.64) considered Baltisphaeridium pilosum var. longispinosum to be a taxonomic junior synonym (at specific rank) of Prolixosphaeridium anasillum, not of Hystrichosphaeridium xanthiopyxides var. granulosum (as Prolixosphaeridium granulosum); Prolixosphaeridium anasillum, according to Lentin and Williams (1993, p.539) — however, this synonymy was based on a mis-reading of Erkmen and Sarjeant (1980). Age: Senonian.
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REMARKS: Davey et al. 1966, p. 172
This species, which has a known range from Upper Jurassic to Upper Cretaceous, is represented in the London Clay at Whitecliff and Enborne; it is, however, possible that these specimens are derived. It differs from P. deirense in having only approximately 30 processes, organized into rows, with one antapical process.
Prolixosphaeridium granulosum (Deflandre, 1937b, p.77, pl.16 [also labelled pl.13], fig.4) Davey et al., 1966, p.172. Holotype: Deflandre, 1937b, pl.16 (also labelled pl.13), fig.4; Fauconnier and Masure, 2004, pl.66, fig.4. Originally Hystrichosphaeridium xanthiopyxides var. granulosum, subsequently Baltisphaeridium xanthiopyxides var. granulosum (combination not validly published, Appendix A), thirdly Baltisphaeridium granulosum (Appendix A), fourthly (and now) Prolixosphaeridium granulosum. Taxonomic junior synonyms (at specific rank): Baltisphaeridium pilosum var. longispinosum (as Tenua pilosa subsp. longispinosa), according to Sarjeant (1976c, p.19) — however, Erkmen and Sarjeant (1980, p.64) considered Baltisphaeridium pilosum var. longispinosum to be a taxonomic junior synonym (at specific rank) of Prolixosphaeridium anasillum, not of Hystrichosphaeridium xanthiopyxides var. granulosum (as Prolixosphaeridium granulosum); Prolixosphaeridium anasillum, according to Lentin and Williams (1993, p.539) — however, this synonymy was based on a mis-reading of Erkmen and Sarjeant (1980). Age: Senonian.
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REMARKS: Davey et al. 1966, p. 172
This species, which has a known range from Upper Jurassic to Upper Cretaceous, is represented in the London Clay at Whitecliff and Enborne; it is, however, possible that these specimens are derived. It differs from P. deirense in having only approximately 30 processes, organized into rows, with one antapical process.