Ammonidium hydraferum
- Citations total:
- 2
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| details | Frasnian | Belgium | Lister,T.R. The acritarchs and chitinozoa from the Wenlockian and Ludlowvian series of the Ludlovian and Millichope areas, Shrophire. | 1970 | |
| details | Frasnian | Nd | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 |