''Christmaplax mirabilis'' is a species of

crab Crabs are decapod crustaceans of the infraorder Brachyura (meaning "short tailed" in Greek language, Greek), which typically have a very short projecting tail-like abdomen#Arthropoda, abdomen, usually hidden entirely under the Thorax (arthropo ...

native to

Christmas Island Christmas Island, officially the Territory of Christmas Island, is an States and territories of Australia#External territories, Australian external territory in the Indian Ocean comprising the island of the same name. It is about south o ...

, Australia. It is the only known species in the genus ''Christmaplax''.

References

Crabs Fauna of Christmas Island Monotypic decapod genera {{Eubrachyura-stub