Trachysphaeridium rigidulum
- Citations total:
- 2
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| details | Late Precambrian | Early Cambrian | Finland | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 |
| details | Middle Proterozoic | China(Hopei) | Yan,Y.-Z. Shale-Facies microflora from the Changzhougou Formation (Changcheng System) in Pangjiabu Region, Hebei, China. | 1991 |