May Belle Hutson Chitwood (September 17, 1908 – September 19, 1994)[1] was an American author, nematologist, helminthologist, and zoologist at the Agricultural Research Service, curator of the National Parasite Collection, and director of the primate parasite registry at University of California at Davis.[2][3] Chitwood specialized in the morphology of nematodes early in the research of this aspect of the species, and was considered a world authority. She published over 50 research papers about nematology, helminthology, and zoology.[4][5]