SIMS, Patricia A., & R. ROSS
1990 ("May") [postmarked Sept. 24]
Triceratium pulvinar and T. unguiculatum, two confused species
Diatom Res.
5(1): 155-169, 24 figs.

[Middle Eocene to Oligocene; Biddulphia reticulata transferred to Triceratium as T. dictyotum]

Keyboarded taxa: 3