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Abstract
The recovery of numerous, well‐preserved dinoflagellate specimens representing a population of Alterbia acutula (Wilson) Lentin & Williams from the Maestrichtian Monmouth Formation of Maryland has made possible, an assessment of the morphological variability of the species. The close affinity of A. acutula and A. asymmetrica (Wilson) Lentin & Williams is discussed. A. recticornis (Vozzhennikova) Lentin & Williams and A. curvicornis (Vozzhennikova) Lentin & Williams are herein considered junior synonyms of A. acutula.
Notes
Present address: Union Oil Co. of California, Research Center, P. O. Box 76, Brea, CA 92621