Richness, systematics, and distribution of molluscs associated with the macroalga Gigartina skottsbergii in the Strait of Magellan, Chile: A biogeographic affinity study Author Rosenfeld, Sebastian Laboratorio de Macroalgas Antarticas y Subantarticas, Universidad de Magallanes, Casilla 113 - D, Punta Arenas, Chile & Instituto de Ecologia y Biodiversidad (IEB), Santiago Author Aldea, Cristian Laboratorio de Ecologia y Medio Ambiente, Instituto de la Patagonia, Universidad de Magallanes & Programa GAIA-Antartica, Universidad de Magallanes cristian.aldea@umag.cl Author Mansilla, Andres Laboratorio de Macroalgas Antarticas y Subantarticas, Universidad de Magallanes, Casilla 113 - D, Punta Arenas, Chile & Instituto de Ecologia y Biodiversidad (IEB), Santiago & Parque Etnobotanico Omora, Sede Puerto Williams, Universidad de Magallanes Author Marambio, Johanna Laboratorio de Macroalgas Antarticas y Subantarticas, Universidad de Magallanes, Casilla 113 - D, Punta Arenas, Chile Author Ojeda, Jaime Laboratorio de Macroalgas Antarticas y Subantarticas, Universidad de Magallanes, Casilla 113 - D, Punta Arenas, Chile & Instituto de Ecologia y Biodiversidad (IEB), Santiago & Parque Etnobotanico Omora, Sede Puerto Williams, Universidad de Magallanes text ZooKeys 2015 2015-08-31 519 49 100 http://dx.doi.org/10.3897/zookeys.519.9676 journal article http://dx.doi.org/10.3897/zookeys.519.9676 1313-2970-519-49 E6F1CD8274AD4DE59806B00AADC4771B FFCEFFC81C5BC028FF86FFA85720FF85 579018 Pareuthria paessleri (Strebel, 1905) Fig. 6C Material examined. 1 spm (7 x 4 mm ). Synonymy. See Powell (1951) . Remarks. This species is similar to the species Pareuthria cerealis but differs in that the last whorl is more globular, and it has spiral stripes in the base of the last whorl ( Cardenas et al. 2008 ). Our examined specimen presented an eroded shell. Distribution. Magellanic: Smyth Channel ( Powell 1951 ); Strait of Magellan ( USNM 2010 ): Punta Santa Maria (this record) and Carlos III Island ( Aldea et al. 2011a ); Ushuaia ( Strebel 1905b ) and Puerto Eugenia ( Strebel 1905b ); Le Maire Strait ( Strebel 1905b ).