 It has also been suggested that fossils attributed to Australopithecus anamensis and Au. afarensis  had specialized wrist morphology that was retained from an earlier knuckle-walking ancestor.
<clarity>  It has also been suggested that fossils attributed to Australopithecus anamensis and Au. afarensis  had specialized wrist morphology that was retained from an earlier knuckle-walking ancestor.
 It has also been suggested that fossils attributed to Australopithecus anamensis and Au. afarensis also may have had specialized wrist morphology that was retained from an earlier knuckle-walking ancestor.