- Author:
- Downie,C.
- Year:
- 1973
- Title:
- Observations on the nature of the acritarchs
- Reference:
- Downie,C. (1973) Observations on the nature of the acritarchs Palaeontology Vol. 16 # 2 P. 239- 259
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Acanthodiacrodium | Acanthodiacrodium | Nd | Late Cambrian | Early Ordovician |
| Acanthodiacrodium | Acanthodiacrodium sp | England | Tremadocian | |
| Acanthodiacrodium | Acanthodiacrodium sp | USSR | Tremadocian | |
| Actipilion | Actipilion | Nd | Middle Ordovician | |
| Ammonidium | Ammonidium | Nd | Late Gothlandian | Late Devonian |
| Ammonidium | Ammonidium sp. Down.,1973 sp. nov. | USA | Early Devonian | |
| Anthatractus | Anthatractus | Nd | Middle Gothlandian | Early Devonian |
| Arbusculidium | Arbusculidium | Nd | Early Cambrian | |
| Aremoricanium | Aremoricanium | Nd | Ordovician | |
| Aremoricanium | Aremoricanium sp | USA | Ashgillian | |
| Asketopalla | Asketopalla | Nd | Middle Ordovician | |
| Axisphaeridium | Axisphaeridium | Nd | Middle Ordovician | |
| Bacisphaeridium | Bacisphaeridium | Nd | Late Ordovician | |
| Bacisphaeridium | Bacisphaeridium sp | England | Caradocian | |
| Baiomeniscus | Baiomeniscus | Nd | Middle Gothlandian | |
| Baltisphaeridium | Baltisphaeridium | Nd | Cambrian | Early Gothlandian |
| Buedingiisphaeridium | Buedingiisphaeridium | Nd | Late Gothlandian | Late Devonian |