As a result, this analysis is separating crania with relatively long, flat frontals from those with shorter and more curved frontals along variate 1, while variate 2 is separating relatively broader, flatter frontals from those that are narrower and more curved.
This positioning reflects the exceptionally long and flat frontals that characterize these specimens.
The Aitape frontal was discovered in 1929 during petroleum prospecting operations (Nason-Jones 1930; Fenner 1944).
While initial interpretations of the geology at the site suggested the frontal was deposited during sea-level fluctuations at some stage in the Pleistocene (Hossfeld 1949), later radiocarbon dates indicate a Holocene date for the deposits containing them (Hossfeld 1964, 1965).
Aitape consists of a nearly complete frontal bone that has darkened to a chocolate brown (Figure 1).
The Aitape frontal represents one of the few ancient human specimens from New Guinea, and it is broadly contemporary with a number of important mid-Holocene remains from Australia.