Blanc (1961) provided a detailed morphological description of a single upper M2 from a juvenile individual, designated Leuca 1 from Grotta delle Tre Porte, Italy. The author concluded the tooth is a Neanderthal but took the position that neanderthals are not a distinct species from Homo sapiens and so offers the synonym Homo homo var. neanderthalensis to emphasize this interpretation. The author included a detailed description, illustrations, and measurements of the tooth, all to illustrate how the tooth belongs to the neanderthal taxon and also that neanderthals are the same species as extant humans.
Campbell (1965) listed the name is nomen nudum for lack of any differential diagnosis to distinguish Homo homo neanderthalensis from any other taxon.
