selected publications article Disruptive Selection for Sternopleural Chaeta Number in Various Strains of Drosophila.. The American Naturalist. 102:525-532. 1968 thesis or dissertation Disruptive Selection for Sternopleural Chaeta Number in Various Strains of Drosophila Melanogaster. Jan. 1968 A study on disruptive selection for sternopleural chaeta number in drosophila melanogaster and its implications for sympatric speciation. Feb. 1966