Bohmig L 1908 (citation)- description and illustration - from Antarctic. Lohner L 1910 (citation)- comment on type of digestive parenchym in Reisinger E 1926 (citation)- reports from South Pole- German expedition note one before from Belgica expedition - is circumpolar ? Dorjes J 1968 (citation)- lists p 57.
Notes for the valid (accepted) taxonomic name