A lmost nine years ago I posted about a superciliary arch unearthed in Mexico (See post), and a link to the paper itself:
Image (source):
The authors state that:
"One Chapala superciliary arch deserves specific mention due to its large size. Studies by Solórzano show the bone resembles that in archaic Homo sapiens at Arago, France. In an unpublished 1990 report, Texas A&M osteologists suggest the brow’s thickness and robustness are comparable to those of KNM-ER 3733 (African Homo erectus). Our measurements show the central torus thickness is 13.3, compared with 8.5 mm for KNM-ER 3733; the lateral torus thickness is 11.5 versus 9.0 mm (Rightmire 1998). Thus for the sake of comparison, the brow is more like that of Zhoukoudian Skull XI (Asian Homo erectus), with a central torus thickness of 13.2 +/- mm; lateral torus thickness was not measured (Rightmire 1998). Modern brows are too diminutive to allow these measurements. The brow also shows pneumatization (air pockets) along its length.
However, to reiterate the findings of the Texas A&M workers, these comparisons do not imply that pre-Homo sapiens were in the Americas. No phylogenetic or age implications are intended. Instead, the comparisons demonstrate the size relative to most New World specimens, although brows on the Lagoa Santa skull (Bryan 1978) and on recent Tierra del Fuego and Patagonia crania (Lahr 1995; C.L. Brace pers. comm. 1998) appear comparable.
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