The inventoried object appears to remain in an aggressive, tense posture. When placed on a flat surface, the sound ball causes the object to rock. The animals occur en masse on both coasts of Costa Rica to lay their eggs and were consumed in large quantities in pre-Columbian periods. In the Gran Coclé region, the crab theme appears above all on the polychrome pottery of the Conte group (700-900d.C.). In the Gran Nicoya region, the representation of the species is associated with the polychrome Papagayo pottery (800-1350d.C.). Snarskis (1981: 223, Fig. 258) depicts a similar object, but it did not serve as a bell. (Künne 2005)