I'm looking for help with finding a genera from this chela/ crab claw, found in Cenozoic rock from Northwest Nelson, South Island, New Zealand. It is fairly weathered, and was originally split between two separate stones lying on the beach. A little reconstruction and preparation produced the result in the image. It was not in-situ so I am unsure which rock group it is associated with. I'm guessing it is either late Oligocene or early Miocene in age based on what I know of the area, but I could be wrong.
I'm hoping there are some crab experts out there who will know what this is straight away, unfortunately I'm not well versed in decapods and seldom find them around where I live in the North Island.