"Trichobatrachus robustus" - also called the hairy frog or horror frog. Got a problem with that, bub? Though they lack the adamantium skeleton, they do have bone claws that they can unsheathe when threatened. They do this by breaking a cartilage nodule which connects the claw to the rest of their toe bone. Retraction is believed to occur naturally as the tissue broken by the claw regenerates. Their hair actually consists of skin extensions, and only shows up on males who have bred. They help increase their oxygen intake while they're guarding their eggs. (Males who don't manage to mate go on to join the X-Frens instead)
>guess who got laid last night