Through his writing and photography, Larry S. Roberts touched the life of every student and every teacher who ever used any edition of Foundations of Parasitology, Integrated Principles of Zoology, Biology of Animals, or Animal Diversity, all leading textbooks with a global distribution. His discipline, no-nonsense attention to detail, and undaunted approach to major tasks—think updating the indices for all those books—were a model for his co-authors on the massive new edition projects. But those traits also characterized his research on the physiology of Hymenolepis diminuta, and he thus brought a mature scientist's intellectual repertoire to his textbook work. His 1961 paper on H. diminuta population density and physiology was described by one reviewer at the time as “the most basic contribution to the growth physiology of platyhelminths.” Larry Roberts received the American Society of Parasitologist's (ASP) Henry Baldwin Ward Medal in 1971 in recognition...

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