- Author:
- Grahn,Y.
- Year:
- 1988
- Title:
- Chitinozoan stratigraphy in the Ashgil and Llandovery. (In: A Global Analysis of the Ordovician-Silurian Boundary. L.R.M.Cocks and R.B.Rickards, editors)
- Reference:
- Grahn,Y. (1988) Chitinozoan stratigraphy in the Ashgil and Llandovery. (In: A Global Analysis of the Ordovician-Silurian Boundary. L.R.M.Cocks and R.B.Rickards, editors) British Museum (Natural History) Geology, Bulletin Vol. 43 P. 317- 323
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Pterochitina | Pterochitina deichai | Libya | Middle Llandoverian | Middle Aeronian |
| Sphaerochitina | Sphaerochitina lepta | Worldwide | Late Pushgillian | Rawtheyan |
| Sphaerochitina | Sphaerochitina lepta | Libya | Middle Ashgillian | Late Ashgillian |
| Sphaerochitina | Sphaerochitina lepta | USA(Mid-Continent) | Ashgillian | |
| Sphaerochitina | Sphaerochitina lepta | Oklahoma | Early Ashgillian | |
| Tanuchitina | Tanuchitina anticostiensis | Worldwide | Late Pushgillian | Rawtheyan |
| Tanuchitina | Tanuchitina anticostiensis | Canada(Quebec) | Late Ashgillian | |
| Tanuchitina | Tanuchitina bergstroemi | Worldwide | Late Caradocian | |
| Tanuchitina | Tanuchitina bergstroemi | England | Rawtheyan | |
| Tanuchitina | Tanuchitina bergstroemi | Scandinavia | Hirnantian | |
| Tanuchitina | Tanuchitina bergstroemi | Canada(Quebec) | Hirnantian | |
| Tanuchitina | Tanuchitina bergstroemi | Sweden | Late Caradocian |