Catalogue no.:	A-000019
Taxon:	Hannaea arcus (Ehrenb.) R.M.Patrick
Label:	Ceratoneis arcus
Family:	Bacillariophyta
Collector:	I.G. Clason
Exsiccate:	Cleve & Möller, Diatoms 17
Country:	Sweden
Locality:	Skinnskatteberg in Östergötland