Johngarthia Johngarthia planata Johngarthia weileri Johngarthia oceanica Johngarthia lagostoma Gecarcinus Clipperton Kenneth E. Stager John S. Garth Geograpsus severnsi Gecarcinidae Fernando de Noronha Marine National Park Atol das Rocas Biological Reserve Socorro Island Wildlife of Saint Helena, Ascension and Tristan da Cunha San Benedicto Island Socorro mockingbird Malpelo Island Clipperton Island Ascension Island Terrestrial crab Porto Seguro