- Author:
- Loeblich,A.R.,Jr.;Tappan,H.
- Year:
- 1971
- Title:
- Two new Orthosphaeridium (Acritarcha), from the Middle and Upper Ordovician.
- Reference:
- Loeblich,A.R.,Jr. et al. (1971) Two new Orthosphaeridium (Acritarcha), from the Middle and Upper Ordovician. American Microscopy Society,Transactions Vol. 90 # 2 P. 182- 188
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Orthosphaeridium | Orthosphaeridium chondrodora sp. nov. | Indiana | Late Ordovician | |
| Orthosphaeridium | Orthosphaeridium vibrissiferum | Oklahoma | Middle Ordovician | |
| Orthosphaeridium | Orthosphaeridium vibrissiferum sp. nov. | Oklahoma | Late Llanvirnian |