Yeah looks to well formed to be an atavistic limb, I'd agree with Azure and say it's lunch that tried to escape. Just look at the bulges in the body near the limb.
__________________ Uncertainty is an uncomfortable position.
But certainty is an absurd one.
That claw looks well placed to be able to fly a plane!
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Didn't snakes have some form of leg back in their evolutionary history? It's the missing link!
Yup, and when those limbs show up in some form it's called an atavism; often the genes for something are still in the organism but are no longer expressed, but sometimes it's possible that something triggers the genes and they get expressed, resulting in atavistic features, like legs in snakes and whales and dolphins, tails in humans, etc...
They usually aren't very well formed though, and would usually show up in a pair, which is why I didn't think this was the case.
__________________ Uncertainty is an uncomfortable position.
But certainty is an absurd one.
"Know this Clawed Snake, I shall smash your skull like a clam on my tummy!"
__________________ "In brightest day, in blackest night / No evil shall escape my sight / Let those who worship evil's might / Beware my power, Green Lantern's light!"