Scientific name	Latitude	Longitude	Year	Month	Basis of record	Dataset	Institution code	Collection code	Locality
Rissoella powelli Ponder, 1983	-54.36667	-36.45	1902	5	preserved specimen	Invertebrates Collection of the Swedish Museum of Natural History	NRM	EVmain	Cumberland Bay, outside Grytviken ("ausserhalb der Kochtopfbucht")
Rissoella powelli Ponder, 1983	-60.7167	-45.6333	1977		human observation	SOMBASE – Southern Ocean mollusc database: a tool for biogeographic analysis in diversity and evolution
Rissoella powelli Ponder, 1983	-60.7167	-45.6333			human observation	SOMBASE – Southern Ocean mollusc database: a tool for biogeographic analysis in diversity and evolution
Rissoella powelli Ponder, 1983	-60.5833	-45.5			unknown	SOMBASE	BAS	Barnes et al 2008	South Orkneys
Rissoella powelli Ponder, 1983	-60.7167	-45.6333			unknown	SOMBASE	BAS	SOMBASE	Borge Bay
Rissoella powelli Ponder, 1983	-60.7167	-45.6333			unknown	SOMBASE	BAS	SOMBASE	50m north of Billie Rocks
Rissoella powelli Ponder, 1983	-54.3667	-36.45			unknown	SOMBASE	BAS	SOMBASE	South Georgia