We assigned Ardipithecus to the Hominidae based on numerous dental, cranial, and postcranial characters. Sarmiento argues that these characters are not exclusive to hominids, contending that Ardipithecus is too old to be cladistically hominid. His alternative phylogeny, however, is unlikely because it requires tortuous, nonparsimonious evolutionary pathways.
White, Tim D.; Suwa, Gen; Lovejoy, C. Owen (2010). Response to Comment on the Paleobiology and Classification of Ardipithecus ramidus. Science 328(5982) 1105-1105. doi: 10.1126/science.1185462. Retrieved from https://oaks.kent.edu/anthpubs/15