Clarke says Little Foot’s features most closely match A. prometheus, a species proposed in 1948 by anthropologist Raymond Dart. Yet the designation drew swift condemnation from paleoanthropologists Lee Berger, also at the University of the Witwatersrand, and John Hawks at the University of Wisconsin in Madison. In a paper slated to be published this week in the American Journal of Physical Anthropology, the pair argues that the name A. prometheus was originally poorly defined and shouldn’t be used to classify the remains.