Krause (1909) provided detailed anatomical description of the human skeleton and comparative analysis of fossil forms including fossils from Neanderthal, Spy and Krapina, each of which he assigned to separate species in accord with his assertion that they represented independent lineages rather than subspecies of Homo primigenius. On page 176 Krause proposed the names Homo priscus and Homo spyensis as alternate names, based on the Spy 1 specimen.
Campbell (1965) noted Homo priscus Krause, 1909 is an objectively invalid junior homonym, but that Homo spyensis is available and potentially valid. Campbell (1965) noted the adult skeleton Spy 1 as the lectotype.
