Tetrabrachiophora
- Citations total:
- 3
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| original | Early Oligocene | Poland | Eisenack,A. Microfossils from the Lower Oligocene phosphorites of Samland and concerning the uniformity of Hystrichospheres. | 1954 | |
| details | Nd | Nd | Brito,I.M. The acritarchs | 1967 | |
| details | Nd | Nd | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 |