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Hystrichosphaeridium malleoferum
Hystrichosphaeridium "malleoferum" (White, 1842, p.37, pl.4, div.3, fig.7) Lentin and Williams, 1993, p.321.
Combination not validly published: transfer not intended.
NOW Achomosphaera?. Originally Xanthidium (acritarch), subsequently Baltisphaeridium (acritarch), thirdly (and now) Achomosphaera?, fourthly Hystrichosphaeridium (combination not validly published).
Although Deflandre (1937b, p.79) indicated this to be a species of Hystrichosphaeridium, he did not definitely associate the epithet and generic name (see I.C.N. Article 35.2). Thus, in contradiction to the informal treatment of Sarjeant (1991, p.88) and the formal treatment of Lentin and Williams (1993), this combination is not attributable to Deflandre (1937b) (pending assessment under the I.C.Z.N.). Both Sarjeant (1991) and Lentin and Williams (1993) accepted this as a provisional species of Achomosphaera.
Holotype: White, 1842, pl.4, fig.7; Sarjeant, 1991, fig.4.6.
Age: Late Cretaceous.
Combination not validly published: transfer not intended.
NOW Achomosphaera?. Originally Xanthidium (acritarch), subsequently Baltisphaeridium (acritarch), thirdly (and now) Achomosphaera?, fourthly Hystrichosphaeridium (combination not validly published).
Although Deflandre (1937b, p.79) indicated this to be a species of Hystrichosphaeridium, he did not definitely associate the epithet and generic name (see I.C.N. Article 35.2). Thus, in contradiction to the informal treatment of Sarjeant (1991, p.88) and the formal treatment of Lentin and Williams (1993), this combination is not attributable to Deflandre (1937b) (pending assessment under the I.C.Z.N.). Both Sarjeant (1991) and Lentin and Williams (1993) accepted this as a provisional species of Achomosphaera.
Holotype: White, 1842, pl.4, fig.7; Sarjeant, 1991, fig.4.6.
Age: Late Cretaceous.