Lois Ann Pfiester (November 20, 1936 – September 28, 1992) was an American phycologist and protistologist, specializing in freshwater dinoflagellate species.
The two colleagues identified more than 30 different stages to the life cycle of dinoflagellates of the genus Cystodinedria.
She was the first to study dinoflagellate life history using light, scanning, and electron transmission microscopy.
[1][4] In 1988 North Carolina State University researchers JoAnn Burkholder and Edward Noga discovered a new dinoflagellate genus which they named Pfiesteria in honor of Lois Ann Pfiester.
[5][6] In 1978 Pfiester married L. Dee Fink, another professor at the University of Oklahoma.