The Retention Index and Homoplasy Excess

Journal Article The Retention Index and Homoplasy Excess Get access James S. Farris James S. Farris Department of Ecology and Evolution, State University of New YorkStony Brook, New York 11794; Department of Entomology, American Museum of Natural HistoryCentral Park West at 79th St., New York, New York 10024; Department of Biology, City College, City University of New York Search for other works by this author on: Oxford Academic PubMed Google Scholar Systematic Biology, Volume 38, Issue 4, December 1989, Pages 406–407, https://doi.org/10.2307/2992406 Published: 01 December 1989 Article history Received: 11 November 1989 Accepted: 18 November 1989 Published: 01 December 1989