I'm gonna say...it's not a claw. I am fairly certain, but not as an expert, that it's a concretion with a shell that is heavily hematite laden. I find a lot of fragments and in some cases whole or partial concretions...called Indian paint pots around here...but the 'shells' can take on some strange shapes for whatever reasons. I read that hematite can be magnetic...all of the fragments that I have are, though not highly. If you dangle a neodymium magnet disc taped to a piece of string...you'll be able to detect slight magnetism that you wouldn't ordinarily be able to detect by using your fingers while holding the same magnet. Anyway, that might be a small indicator that what you have is(might be) hematite. The fine yellowish, orange-ish or brownish fine chalky mud inside...another indicator. It is reported that that is why they're called 'indian paint pots' because they used the colored mud for face/body paint. Your specimen is neat looking....and I'd certainly prize it among my collection.