Neandertal nasal structures and upper respiratory tract "specialization"

Area of Science:

• Paleoanthropology
• Human Evolution
• Comparative Anatomy

Background:

• Previous research proposed unique internal nasal structures (autapomorphies) in Neandertals, suggesting distinct phylogenetic and adaptive specializations.
• These features included specific nasal margin development, medial wall swelling, and lack of lacrimal groove ossification.
• These anatomical claims were linked to potential behavioral differences in Neandertals compared to modern humans.

Purpose of the Study:

• To critically evaluate the anatomical basis for the claimed unique internal nasal structures in Neandertals.
• To reassess the phylogenetic and adaptive significance attributed to these nasal features.
• To determine if the purported autapomorphies are indeed unique to Neandertals.

Main Methods:

• Detailed anatomical review of internal nasal structures in Neandertal fossil specimens.
• Comparison of Neandertal nasal anatomy with relevant fossil and recent human populations.
• Analysis of the validity of previously identified autapomorphies, considering specimen integrity and anatomical variation.

Main Results:

• The analysis revealed significant issues with the original claims, including reliance on damaged or incomplete specimens.
• Primary versus secondary spatial consequences in nasal trait interpretation were not adequately considered.
• The range of variation for these nasal traits in both fossil and recent humans was not sufficiently addressed.

Conclusions:

• The unique phylogenetic and adaptive specializations attributed to Neandertal internal nasal structures are unwarranted.
• The anatomical evidence does not support the claim that Neandertals possessed a previously unrecognized suite of autapomorphies in their internal nasal region.
• Re-evaluation of the data suggests that the claimed distinctiveness of Neandertal nasal anatomy is not supported by rigorous scientific scrutiny.