Caulerpa serrulata (Forsskål) J. Agardh 1837:174 (Figure 7 A,B) Type Locality: −Mokha, Yemen. Description: −Erect to prostate thallus. Compressed assimilators, with white spoted in the field, twisted in random directions, with marginal serrations, (1.2–) 2.2–2.6 (–4.5) cm high, (1.7–) 2.7–3.1 (–4.9) mm wide. Dichotomous branching. Stolons creeping, (0.5–) 0.7–0.8 (–1.1) mm diameter. Habitat: −Rocky and dead coral, between 5–15 m deep. Distribution in the ETP: − Costa Rica: Isla del Coco, Panama: Golfo de Chiriquí. Appear to have restricted distribution to these localities. References: − Wysor 2004, Fernández 2008, Fernández & Alvarado 2008, Fernández-García et al. 2011, Littler & Littler 2010.

Published as part of Fernández-García, Cindy, Wysor, Brian, Riosmena-Rodríguez, Rafael, Salamanca, Enrique Peña- & Verbruggen, Heroen, 2016, DNA-assisted identification of Caulerpa (Caulerpaceae, Chlorophyta) reduces species richness estimates for the Eastern Tropical Pacific, pp. 185-204 in Phytotaxa 252 (3) on page 196, DOI: 10.11646/phytotaxa.252.3.2, http://zenodo.org/record/13676171