- 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 |
|---|---|---|---|---|
| Poikilofusa | Poikilofusa sp | England | Tremadocian | |
| Polyancistrodorus | Polyancistrodorus | Nd | Middle Ordovician | |
| Polyedryxium | Polyedryxium | Nd | Late Gothlandian | Late Devonian |
| Polygonium | Polygonium | Nd | Early Cambrian | |
| Priscogalea | Priscogalea | Nd | Middle Cambrian | Early Ordovician |
| Priscotheca | Priscotheca | Nd | Late Cambrian | Ordovician |
| Prismatocystis | Prismatocystis | Nd | Middle Jurassic | Early Cretaceous |
| Pterospermopsis | Pterospermopsis | Nd | Early Gothlandian | Late Tertiary |
| Pterospermopsis | Pterospermopsis sp | USA | Early Devonian | |
| Pulvinosphaeridium | Pulvinosphaeridium | Nd | Late Ordovician | Silurian |
| Quisquilites | Quisquilites | Nd | Middle Devonian | |
| Retisphaeridium | Retisphaeridium | Nd | Early Cambrian | |
| Schizodiacrodium | Schizodiacrodium | Nd | Early Ordovician | |
| Sol | Sol | Nd | Late Gothlandian | |
| Solisphaeridium | Solisphaeridium | Nd | Jurassic | |
| Sphaeromorphitae | Sphaeromorphitae | England | Precambriam | Tertiary |
| Staplinium | Staplinium | Nd | Middle Triassic |