Hystrichosphaeridium lewisii Deunff, 1954

Now Multiplicisphaeridium. Originally Hystrichosphaeridium, subsequently Baltisphaeridium, thirdly (and now) Multiplicisphaeridium. See also Ammonidium (combination not validly published).

Holotype: Deunff, 1954, fig.3
Age: Middle Devonian