Re: Suggestive, but nothing more
we need something more compelling. bones would be nice. fossil deposition on mars may be completely different than on earth, however. Most of earth's fossils seem to be from catastrophic burials, like from volcanos and floods and stuff like that. Mars has sedimentary rocks as well, and so there may be similar deposits. Not sure if they had the kinds of dino-killing meteors that Earth had, though, to create really significant fossil layers in the rocks.
So finding fossils might be really difficult, regardless of the presence of ancient life there.