Gorgonisphaeridium lewisii (Deunff, 1954a, p.240, fig.3) Sarjeant and Vavrdova, 1997, p.24.

Acritarch species.
Originally Hystrichosphaeridium, subsequently Baltisphaeridium (Acritarch), thirdly Ammonidium (combination not validly published, Acritarch), fourthly Multiplicisphaeridium (Acritarch), fifthly (and now) Gorgonisphaeridium.

Holotype: Deunff, 1954a, fig.3.
Age: Mid Devonian.