- Author:
- Harris,T.M.
- Year:
- 1974
- Title:
- Williamsoniella lignieri.
- Reference:
- Harris,T.M. (1974) Williamsoniella lignieri. Palaeontology Vol. 17 # 1 P. 125- 148
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Williamsoniella | Williamsoniella lignieri | England(Yorkshire) | Early Bajocian | |
| Williamsoniella | Williamsoniella papillosa | England(Yorkshire) | Early Bajocian |