The growth of evolutionary morphology in the late 19th and early 20th centuries was inspired by the work of Carl Gegenbaur (1826–1903) and his protégé and friend Ernst Haeckel (1834–1919). However, neither of them succeeded in creating and applying a strictly Darwinian (selectionist) methodology. This task was left to the next generation of evolutionary morphologists. In this paper we present a relatively unknown researcher, Alexej Nikolajevich Sewertzoff (1866–1936) who made important contributions towards a synthesis of Darwinism and evolutionary morphology. J. Exp. Zool. (Mol Dev. Evol.) 302B:343–354, 2004. © 2004 Wiley-Liss, Inc.