Estación Costera de Investigaciones Marinas (ECIM) beach, Las Cruces, San Antonio Province, Valparaiso Region, Chile, Pacific Ocean (gazetteer estimate -33.5028°, -71.6335°); intertidal zone of exposed rocky shores, on holdfasts of Lessonia spicata, algae turfs of Sphacelaria cirrosa, Corallina officinalis and Ulva rigida, and Perumytilus purpuratus beds