J.-B. Rames discovered flints at Puy Courny which triggered debate on the presence of ancestral humans in the Miocene, and the new
genus and
species Homosimius ramesii was proposed by de Mortillet. G. de Mortillet also suggested that these tools should be classified as the "Puycournian Epoch". His hypothetical genus gained another species,
H. bourgeoisi, from the
Oligocene of
Thenay,
France based on similar flints and exhibited by Abbot Bourgeois at the
International Congress of Anthropology and Prehistoric Archaeology hosted in Paris, 1867. G. de Mortillet (1883) named it in honour of Bourgeois, but Boule (1952) suggested usage as
Homo bourgeoisi as a hypothetical link between apes and humans, with
Homo riberoi (a hypothetical species named from Miocene flints near Otto,
Lisbon) being intermediate between
H. bourgeoisi and
H. ramesi (a hypothetical species named from
Aurillac). This genus would have served as an ancestor to
Neanderthals and then humans in a linear stage, which de Mortillet envisioned these toolmakers as large-brained but not fully
bipedal. Knowledge at the time contradicted his belief, as
Homo erectus was demonstrably fully bipedal. As later analysis would reveal, the 'tools' were
eoliths of natural origin and originated from (mostly) marine
Miocene strata that predates human activities, but suggest integral geological activities. ==Stone age art==