eLife Assessment
The authors present a critique of current usage of principal component analysis in geometric morphometrics, making a compelling case with benchmark data that standard techniques perform poorly. The work is an important contribution to the field and will hopefully lead to a reassessment of the methodology most scientists in morphometrics currently use. This work challenges a very commonly used analytical approach and is bound to raise some controversy in the community, but the authors' critique is based on a well-founded and well-thought out analysis.