41 extant species: see text Calappa is a genus of crabs known commonly as box crabs or shame-faced crabs.

The name box crab comes from their distinctly bulky carapace, and the name shame-faced is from anthropomorphising the way the crab's chelae (claws) fold up and cover its face, as if it were hiding its face in shame.

[2] There are 43 extant species in the genus:[3]

[4][5] Fossils of species within this genus can be found in sediment of Europe, United States, Mexico, Central America, Australia and Japan from Paleogene to recent (age range: 33.9 to 0.0 Ma).

This Eubrachyura article is a stub.