What “apelike” features do we see in the early hominine genera Sahelanthropus, Orrorin, and Ardipithecus?

Several fossils that date from the Miocene might be considered hominine. Why is it difficult to classify these forms accurately? It is frequently stated that the hominines evolved from apes. What “apelike” features do we see in the early hominine genera Sahelanthropus, Orrorin, and Ardipithecus? What features place them into the hominines?