Carl Friedrich Claus (1835–99)

German zoologist. Studied medicine, mathematics, and zoology at Marburg and Giessen, 1854–7. Professor of zoology, Marburg, 1863; Göttingen, 1870. Professor of zoology and head of the institute of zoological and comparative anatomy at Vienna, 1873. Founder and first director of the zoological research station at Trieste, 1873. Did important research on environmental influences on variability, especially in the Crustacea. A staunch supporter of CD in his writing and lecturing. His zoology textbook was a standard work in the last three decades of the nineteenth century.