Hystrichosphaeridium lairdii
From dinoflaj2
"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: Mid Silurian.
Parent: Hystrichosphaeridium
