| SVCK Number: | 460 |
| Genus: | Cosmarium |
| Species: | protractum |
| Class: | Zygnematophyceae |
| Order: | Desmidiales |
| Family: | Desmidiaceae |
| Recommended Medium: | WH |
| Collector: | Krienitz, L. |
| Collection Country: | Germany |
| Collection Locality: | Brandenburg, Germany (Dagowsee) (uncert. approx. 450m) |
| Geo Coordinates WGS84: | N 53° 09′ 06", E 13° 03′ 11″ |
| Date of Collection: | 01.01.1998 |
| Determined by: | Engels, M. |
| Strain used in Publication(s): | Gontcharov and Melkonian 2008 Am J Bot 95, 1079-1095; Gontcharov and Melkonian 2011 Protist 162,253-267 |
| Remark(s): | origin IPM, isolated by Engels, M. |