Hystrichosphaeridium lairdii

"lairdii" Deflandre, 1946c, card 1112. Name not validly published: no description.  Originally Hystrichosphaeridium (name not validly published), subsequently Veryhachium (Appendix A).  Taxonomic senior synonym: Veryhachium valiente Cramer, 1964, an acritarch species, by implication in Martin (1969, p.95), who believed Veryhachium lairdii to be the senior name.  Age: Middle Silurian.

Parent: Hystrichosphaeridium