Deunff, J. & Evitt, W.R., 1968. Tunisphaeridium, a new acritarch genus from the Silurian and Devonian. Stanford University Publications, Geological Sciences 12(1): 1-13, pl. 1.
|
Piel, K.M. & Evitt, W.R., 1980. Paratabulation in the Jurassic Dinoflagellate Genus Nannoceratopsis and a Comparison with Modern Taxa. Palynol. 4: 79-104. ≡
|