Fertile sporophylls of Macrocystis pyrifera (L.) C. Ag. were collected in March of 2007 from “Totoralillo Sur” (32°01′ 11″ S; Fig. 1) and transported in wet insolated containers (10±2°C) to the Marine Botany Laboratory at the Universidad Católica del Norte in Coquimbo (29°57′56″ S). The parental sporophytes had a typical morphology of Macrocystis beds of northern Chile, being 2 m long with large and narrow fronds.