There are 10 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 3675 | A. Miller | North Wales Rawtheyan Assemblage 4D, Rhwlas Limestone Rawtheyan - Ordovician 5 - United Kingdom | Bassett et al. (1966) |
| 188588 | M. Hopkins | Lower Allt Ddu trilobites Soudleyan - Ordovician 4 - United Kingdom | Whittington (1968) |
| 188589 | M. Hopkins | Upper Allt Ddu trilobites Soudleyan - Ordovician 4 - United Kingdom | Whittington (1968) |
| 188590 | M. Hopkins | Gelli-grîn Calcarous Ash trilobites, lower beds Longvillian - Ordovician 4 - United Kingdom | Whittington (1968) |
| 188591 | M. Hopkins | Gelli-grîn Calcareous Ash trilobites, middle beds Woolstonian - Ordovician 4 - United Kingdom | Whittington (1968) |
| 188592 | M. Hopkins | Gelli-grîn Calcarous Ash trilobites, upper beds Woolstonian - Ordovician 4 - United Kingdom | Whittington (1968) |
| 188593 | M. Hopkins | Glyn Gower trilobites Soudleyan - Ordovician 4 - United Kingdom | Whittington (1968) |
| 188594 | M. Hopkins | Nant Hir Mudstones trilobites Costonian/Harnagian - Ordovician 4 - United Kingdom | Whittington (1968) |
| 188595 | M. Hopkins | Darfel Limestone trilobites Costonian - Ordovician 4 - United Kingdom | Whittington (1968) |
| 188596 | M. Hopkins | Middle Allt Ddu trilobites Soudleyan - Ordovician 4 - United Kingdom | Whittington (1968) |