"Name is given after the name of the country Costa Rica [which comprises Isla del Coco, where Bahia Chatham is located]" (Sikorski & Pavlova, 2018: 175).
Sikorski, Andrey; Pavlova, Lyudmila. (2018). Two new species of Laonice (Norgensia) (Spionidae, Polychaeta) from subtropical Atlantic and subequatorial Pacific coasts of North America. Zootaxa. 4418(2): 171-178. available online athttps://biotaxa.org/Zootaxa/article/view/zootaxa.4418.2.6