Calappidae

Calappidae is a family of crabs containing 16 genera, of which 7 are only known as fossils:
 * Acanthocarpus Stimpson, 1871
 * Calappa Weber, 1795
 * † Calappella Rathbun, 1919
 * † Calappilia A. Milne-Edwards, 1873
 * Calappula Galil, 1997
 * Cryptosoma Brullé, 1839
 * Cycloes De Haan, 1837
 * Cyclozodion Williams & Child, 1989
 * Mursia A. G. Desmarest, 1823
 * † Mursilata C.-H. Hu & Tao, 1996
 * † Mursilia Rathbun, 1918
 * † Mursiopsis Ristori, 1889
 * Paracyclois Miers, 1886
 * Platymera H. Milne Edwards, 1837
 * † Stenodromia A. Milne-Edwards, 1873
 * † Tutus Collins in Collins, Portell & Donovan, 2009

Fossils within this family can be found in sediment of Europe, United States, Mexico, Central America, Australia and Japan from Cretaceous to recent (age range: 66.043 to 0.0 Ma).