Showing papers by "Robert R. Sokal published in 1957"

A quantitative approach to a problem in classification

Abstract: The purpose of the study reported in this paper was to determine whether certain statistical procedures might aid persons interested in the relationships among organisms. The objectives of our study were to investigate numerous characters simultaneously in a considerable group of species; to quantify the relations shown among the species, using objective methods; and to indicate these relationships. The organisms selected as an example for use in this study are solitary bees in the family Megachilidae. This choice was made because one of us (C. D. M.) has made recent systematic studies of these insects, so that conclusions as to the relationships obtained by usual systematic procedures could be compared