I could have meant "up to us vertebrates" or "up to us mammals" for all you know. And for all I know, come to think of it. Anyhoo...

I'll take a lot of convincing that proprioception isn't just a highly-developed manifestation of coordination. It's an explanation of how nervous systems effect coordination rather than a sense for receiving external stimuli, which is how we normally regard senses, but I'm up for anything, given evidence. Perhaps you'd care to redefine "senses."
I'm definitely not up for telepathy and stuff like that. Where's the real evidence? Show me that and I might get interested. And what are these other senses that animals have that we don't?