Consider other hominoid fossils that may or may not show affinities specifically with the orangutan, such as Heliopithecus, Turkanapithecus, Kenyapithecus, and Ouranopithecus.    From Wordnik.com.  [Archive 2006-04-01] Reference

You might ask about ask if there are other species of Hominids that Luskin forgot to mention that also walked upright: oh, say, Australopithicines (several species), Paranthropines (several species), Kenyapithecus, Ardipithecus, or perhaps several that we're currently unsure as to if they walked upright or not (Orrorin, Sahelanthropus).    From Wordnik.com.  [Archive 2007-07-01] Reference

Kenyapithecus and Griphopithecus.    From Wordnik.com.  [Primates in the News] Reference

(Ramapithecus, Oreopithecus, Limnopithecus, Kenyapithecus).    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference