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Polysphaeridium ambiguum
Polysphaeridium "ambigua" (Deflandre, 1937b, p.81, pl.16 [al. pl.13], figs.8–9) Stover and Helby, 1987d, p.277.
NOW Sepispinula?. Originally Micrhystridium (Acritarch), subsequently Cleistosphaeridium, thirdly Polysphaeridium, fourthly Chlamydophorella, fifthly Dapsilidinium, sixthly Gorgonisphaeridium (Acritarch), seventhly (and now) Sepispinula?.
Taxonomic junior synonyms: Hystrichosphaeridium (now Sepispinula?) huguoniotii, according to Clarke and Verdier (1967, p.54) and Hystrichosphaeridium (now Sepispinula) ancoriferum, both according to Yun Hyesu (1981, p.44) and Schiøler and Wilson (1998, p.328) — however, Masure in Fauconnier and Masure (2004, p.499–500) retained Sepispinula ancorifera and Sepispinula huguoniotii.
Holotype: Deflandre, 1937b, pl.16 (al. pl.13), fig.8; Fauconnier and Masure, 2004, pl.71, figs.6–7.
Age: Late Cretaceous.
NOW Sepispinula?. Originally Micrhystridium (Acritarch), subsequently Cleistosphaeridium, thirdly Polysphaeridium, fourthly Chlamydophorella, fifthly Dapsilidinium, sixthly Gorgonisphaeridium (Acritarch), seventhly (and now) Sepispinula?.
Taxonomic junior synonyms: Hystrichosphaeridium (now Sepispinula?) huguoniotii, according to Clarke and Verdier (1967, p.54) and Hystrichosphaeridium (now Sepispinula) ancoriferum, both according to Yun Hyesu (1981, p.44) and Schiøler and Wilson (1998, p.328) — however, Masure in Fauconnier and Masure (2004, p.499–500) retained Sepispinula ancorifera and Sepispinula huguoniotii.
Holotype: Deflandre, 1937b, pl.16 (al. pl.13), fig.8; Fauconnier and Masure, 2004, pl.71, figs.6–7.
Age: Late Cretaceous.