It has been suggested (Baroni-Urbani, 1977; Nelson, and Platnick, 1981: 135, 324-328; Nelson, 1981; Amorim, 1997: 144-145) that key elements of phylogenetic systematics are the same as those in Rosa's (1918) little known publication, and some have even wondered if Hennig learned of those details during the 3-4 years he spent in Italy during the Second World War (M. Schmitt, 1999; also pers. comm.). However, whenever Hennig might have acquired knowledge of Rosa's earlier contribution, he may just as well dismissed it, because Rosa's ideas were so strongly influenced by Lamarckian thinking. That Hennig never seems to have cited Rosa (1918, including the 1931 French translation) should not be taken as anything especially sinister, because Hennig (e.g., 1966) never referenced Lamarck either. Hennig was a Darwinian, and Rosa and Lamarck were not.
Schlee, D. 1978. Entomologica Germanica 4: 377-391.