"Sediba casts everything called Homo before erectus into question, " says de Ruiter.
“源泉种使直立人出现之前的所有被称为人属的物种遭到质疑，”德·鲁伊特说。
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In 2003, Dutch agriculturalist Marc DE Ruiter saw dairy farmers in windswept Shanxi province literally pouring their milk down the drain because there was not enough demand.
The long legs and that modern ankle are key elements on the human side of the ledger, says Darryl de Ruiter, a paleoanthropologist at Texas A&M University and part of the Malapa team.
德州农工大学（Texas A&M University）的古人类学家、也是伯杰团队成员的达瑞尔·德·鲁伊特（Darryl de Ruiter）认为，长腿和现代脚踝是将其归入人类的主要因素。