Tasmanoplax
Tasmanoplax latifrons, commonly known as the southern sentinel crab, is a species of crab found on the south-east coast of Australia, from Tasmania to southern NSW, as far north as the Hunter river. It inhabits tidal mudflats with seagrass, and forms burrows. It is the only species in the genus Tasmanoplax.
The carapace is up to about across. It can be distinguished from the semaphore crab that looks similar and is found in similar mudflat habitat, as it has notches in the side of the carapace. It is yellow brown, with setae on the legs, especially the last two.