Protanthropus atavus Haeckel, 1895
Details
Year: 1895
Taxonomic Rank: Species
Holotype: Neanderthal 1
Status: Unavailable
Remark: Nomen nudum
Remarks

Haeckel (1895 p. 631-632) introduced the name Protanthropus atavus as a stage in human evolution following Pithecanthropus erectus, representing "primitive speaking man" of the Diluvial period, i.e. Pleistocene. Haeckel does not provide a morphological desciription. The name is thus nomen nudum.

Campbell (1965) listed Protanthropus atavus as an objective junior synonym of Homo neanderthalensis and indicates the name is nomen nudum.

Groves (1989) listed Protanthropus atavus Haeckel, 1895 as an available junior synonym of Homo sapiens neanderthalensis.

Authorship Reference
E. Haeckel
Systematische Phylogenie der Wirbeltiere (Vertebrata)
Systematische Phylogenie der Wirbeltiere (Vertebrata), Verlag von Georg Reimer, Berlin, 1895
https://www.biodiversitylibrary.org/item/22431#page/7/mode/1up