| SVCK Number: | 321 |
| Genus: | Cosmocladium |
| Species: | constrictum |
| Class: | Zygnematophyceae |
| Order: | Desmidiales |
| Family: | Desmidiaceae |
| Recommended Medium: | EST |
| Collector: | Mollenhauer, D. & Engels, M. |
| Collection Country: | Germany |
| Collection Locality: | Vogelsberg, Germany (Rothenbachteich) (uncert. approx. 250m) |
| Geo Coordinates WGS84: | N 50° 28' 01", E 9° 20' 28" |
| Date of Collection: | 27.10.1977 |
| Determined by: | Engels, M. |
| Red List Information, UK (Brodie et al., 2007): | critical, threatened with extinction (Cat.1) |
| Non-Identical Isolates: | ACOI: 1678; CCAC: 0217+ASW 07118; NIES: 248 |
| Remark(s): | origin IPM, isolated by Engels, M. |